/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:42:16,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:42:16,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:42:16,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:42:16,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:42:16,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:42:16,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:42:16,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:42:16,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:42:16,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:42:16,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:42:16,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:42:16,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:42:16,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:42:16,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:42:16,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:42:16,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:42:16,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:42:16,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:42:16,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:42:16,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:42:16,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:42:16,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:42:16,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:42:16,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:42:16,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:42:16,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:42:16,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:42:16,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:42:16,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:42:16,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:42:16,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:42:16,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:42:16,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:42:16,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:42:16,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:42:16,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:42:16,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:42:16,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:42:16,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:42:16,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:42:16,924 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 [2020-10-15 03:42:16,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:42:16,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:42:16,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:42:16,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:42:16,962 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:42:16,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:42:16,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:42:16,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:42:16,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:42:16,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:42:16,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:42:16,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:42:16,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:42:16,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:42:16,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:42:16,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:42:16,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:42:16,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:42:16,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:42:16,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:42:16,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:42:16,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:42:16,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:42:16,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:42:16,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:42:16,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:42:16,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:42:16,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:42:16,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:42:16,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:42:17,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:42:17,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:42:17,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:42:17,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:42:17,266 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:42:17,267 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-15 03:42:17,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba60c3a20/a5d7fbdf445f4ab699ea4fd0a5b79b3a/FLAGfe97a04f3 [2020-10-15 03:42:17,800 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:42:17,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-15 03:42:17,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba60c3a20/a5d7fbdf445f4ab699ea4fd0a5b79b3a/FLAGfe97a04f3 [2020-10-15 03:42:18,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba60c3a20/a5d7fbdf445f4ab699ea4fd0a5b79b3a [2020-10-15 03:42:18,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:42:18,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:42:18,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:42:18,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:42:18,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:42:18,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@afe831a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18, skipping insertion in model container [2020-10-15 03:42:18,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:42:18,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:42:18,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:42:18,454 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:42:18,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:42:18,666 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:42:18,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18 WrapperNode [2020-10-15 03:42:18,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:42:18,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:42:18,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:42:18,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:42:18,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (1/1) ... [2020-10-15 03:42:18,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:42:18,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:42:18,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:42:18,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:42:18,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (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 [2020-10-15 03:42:18,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:42:18,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:42:18,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:42:18,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:42:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:42:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:42:18,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:42:18,799 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:42:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:42:18,800 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:42:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:42:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:42:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:42:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:42:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:42:19,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:42:19,582 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:42:19,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:42:19 BoogieIcfgContainer [2020-10-15 03:42:19,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:42:19,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:42:19,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:42:19,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:42:19,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:42:18" (1/3) ... [2020-10-15 03:42:19,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac78fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:42:19, skipping insertion in model container [2020-10-15 03:42:19,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:42:18" (2/3) ... [2020-10-15 03:42:19,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dac78fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:42:19, skipping insertion in model container [2020-10-15 03:42:19,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:42:19" (3/3) ... [2020-10-15 03:42:19,598 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-15 03:42:19,609 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:42:19,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:42:19,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:42:19,662 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:42:19,663 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:42:19,663 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:42:19,663 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:42:19,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:42:19,664 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:42:19,664 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:42:19,664 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:42:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-15 03:42:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 03:42:19,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:19,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:42:19,701 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2097319933, now seen corresponding path program 1 times [2020-10-15 03:42:19,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:19,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80935270] [2020-10-15 03:42:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:20,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:20,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:21,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:21,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 03:42:21,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:42:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-15 03:42:21,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:21,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:42:21,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:42:21,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:42:21,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:42:21,942 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-15 03:42:21,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:21,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:21,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:21,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 03:42:21,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:21,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:42:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:21,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:42:21,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:21,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80935270] [2020-10-15 03:42:21,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:21,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:42:21,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033430858] [2020-10-15 03:42:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:42:22,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:42:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:42:22,025 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 6 states. [2020-10-15 03:42:22,255 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:42:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:23,326 INFO L93 Difference]: Finished difference Result 526 states and 845 transitions. [2020-10-15 03:42:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:42:23,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-15 03:42:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:23,346 INFO L225 Difference]: With dead ends: 526 [2020-10-15 03:42:23,347 INFO L226 Difference]: Without dead ends: 442 [2020-10-15 03:42:23,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:42:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-15 03:42:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 260. [2020-10-15 03:42:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-15 03:42:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 386 transitions. [2020-10-15 03:42:23,431 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 386 transitions. Word has length 54 [2020-10-15 03:42:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:23,432 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 386 transitions. [2020-10-15 03:42:23,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:42:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 386 transitions. [2020-10-15 03:42:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:42:23,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:23,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:23,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:42:23,436 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash -926705827, now seen corresponding path program 1 times [2020-10-15 03:42:23,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:23,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687006637] [2020-10-15 03:42:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:24,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:28,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:28,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:42:28,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:42:28,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-15 03:42:28,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:28,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:42:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:42:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 03:42:28,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:28,730 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-15 03:42:28,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:28,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:28,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:28,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:28,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:28,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:42:28,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:28,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:28,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:42:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:42:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:28,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687006637] [2020-10-15 03:42:28,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:28,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:42:28,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328277872] [2020-10-15 03:42:28,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:42:28,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:42:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:42:28,775 INFO L87 Difference]: Start difference. First operand 260 states and 386 transitions. Second operand 6 states. [2020-10-15 03:42:28,964 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:42:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:29,714 INFO L93 Difference]: Finished difference Result 630 states and 960 transitions. [2020-10-15 03:42:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:42:29,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-15 03:42:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:29,719 INFO L225 Difference]: With dead ends: 630 [2020-10-15 03:42:29,719 INFO L226 Difference]: Without dead ends: 566 [2020-10-15 03:42:29,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:42:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-15 03:42:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 413. [2020-10-15 03:42:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-15 03:42:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 624 transitions. [2020-10-15 03:42:29,751 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 624 transitions. Word has length 57 [2020-10-15 03:42:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:29,752 INFO L479 AbstractCegarLoop]: Abstraction has 413 states and 624 transitions. [2020-10-15 03:42:29,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:42:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 624 transitions. [2020-10-15 03:42:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:42:29,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:29,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:29,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:42:29,755 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:29,755 INFO L82 PathProgramCache]: Analyzing trace with hash -559847393, now seen corresponding path program 1 times [2020-10-15 03:42:29,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:29,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647764587] [2020-10-15 03:42:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:29,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:32,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:32,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:42:32,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:42:32,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-15 03:42:32,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:32,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:42:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:42:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 03:42:32,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:32,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:32,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:32,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:32,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:42:32,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:32,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:42:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:42:32,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:32,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647764587] [2020-10-15 03:42:32,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:32,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:42:32,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937046403] [2020-10-15 03:42:32,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:42:32,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:42:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:42:32,459 INFO L87 Difference]: Start difference. First operand 413 states and 624 transitions. Second operand 6 states. [2020-10-15 03:42:32,604 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:42:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:33,422 INFO L93 Difference]: Finished difference Result 799 states and 1219 transitions. [2020-10-15 03:42:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:42:33,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-15 03:42:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:33,430 INFO L225 Difference]: With dead ends: 799 [2020-10-15 03:42:33,430 INFO L226 Difference]: Without dead ends: 675 [2020-10-15 03:42:33,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:42:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-15 03:42:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 498. [2020-10-15 03:42:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-15 03:42:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 756 transitions. [2020-10-15 03:42:33,488 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 756 transitions. Word has length 57 [2020-10-15 03:42:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:33,489 INFO L479 AbstractCegarLoop]: Abstraction has 498 states and 756 transitions. [2020-10-15 03:42:33,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:42:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 756 transitions. [2020-10-15 03:42:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 03:42:33,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:33,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:33,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:42:33,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash 980837471, now seen corresponding path program 1 times [2020-10-15 03:42:33,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:33,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506503197] [2020-10-15 03:42:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:33,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:34,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:36,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:36,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 03:42:36,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:42:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2490 [2020-10-15 03:42:36,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:36,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:42:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:42:36,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 03:42:36,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:36,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:36,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:36,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:36,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:36,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:42:36,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:36,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:42:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:36,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:42:36,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:36,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506503197] [2020-10-15 03:42:36,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:36,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:42:36,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102582744] [2020-10-15 03:42:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:42:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:42:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:42:36,217 INFO L87 Difference]: Start difference. First operand 498 states and 756 transitions. Second operand 6 states. [2020-10-15 03:42:36,357 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:42:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:37,096 INFO L93 Difference]: Finished difference Result 934 states and 1427 transitions. [2020-10-15 03:42:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:42:37,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-15 03:42:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:37,102 INFO L225 Difference]: With dead ends: 934 [2020-10-15 03:42:37,102 INFO L226 Difference]: Without dead ends: 810 [2020-10-15 03:42:37,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:42:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-10-15 03:42:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 589. [2020-10-15 03:42:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-10-15 03:42:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 898 transitions. [2020-10-15 03:42:37,149 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 898 transitions. Word has length 57 [2020-10-15 03:42:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:37,149 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 898 transitions. [2020-10-15 03:42:37,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:42:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 898 transitions. [2020-10-15 03:42:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 03:42:37,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:37,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:37,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:42:37,161 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1929459067, now seen corresponding path program 1 times [2020-10-15 03:42:37,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:37,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717304101] [2020-10-15 03:42:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:37,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:37,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:37,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:38,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:38,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:42,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:42,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 03:42:42,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:42:42,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-15 03:42:42,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:42,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:42:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:42:42,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:42:42,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:42,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:42,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:42,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:42:42,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:42,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:42:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:42:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:42,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717304101] [2020-10-15 03:42:42,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:42,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:42:42,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979173370] [2020-10-15 03:42:42,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:42:42,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:42:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:42:42,411 INFO L87 Difference]: Start difference. First operand 589 states and 898 transitions. Second operand 8 states. [2020-10-15 03:42:42,558 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-15 03:42:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:43,807 INFO L93 Difference]: Finished difference Result 2933 states and 4523 transitions. [2020-10-15 03:42:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:42:43,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-15 03:42:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:43,828 INFO L225 Difference]: With dead ends: 2933 [2020-10-15 03:42:43,828 INFO L226 Difference]: Without dead ends: 2687 [2020-10-15 03:42:43,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:42:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2020-10-15 03:42:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 631. [2020-10-15 03:42:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-15 03:42:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 958 transitions. [2020-10-15 03:42:43,908 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 958 transitions. Word has length 60 [2020-10-15 03:42:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:43,910 INFO L479 AbstractCegarLoop]: Abstraction has 631 states and 958 transitions. [2020-10-15 03:42:43,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:42:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 958 transitions. [2020-10-15 03:42:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 03:42:43,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:43,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:43,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:42:43,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1019361725, now seen corresponding path program 1 times [2020-10-15 03:42:43,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:43,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548257418] [2020-10-15 03:42:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:43,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:44,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:45,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:45,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:47,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:47,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 03:42:47,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:42:47,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3723 [2020-10-15 03:42:47,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:47,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:42:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:42:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 03:42:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:47,912 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-15 03:42:47,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:47,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:47,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:47,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 03:42:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:47,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:42:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:42:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:47,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548257418] [2020-10-15 03:42:47,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:47,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:42:47,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281391886] [2020-10-15 03:42:47,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:42:47,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:42:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:42:47,977 INFO L87 Difference]: Start difference. First operand 631 states and 958 transitions. Second operand 8 states. [2020-10-15 03:42:48,134 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:42:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:49,530 INFO L93 Difference]: Finished difference Result 2778 states and 4272 transitions. [2020-10-15 03:42:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:42:49,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-15 03:42:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:49,543 INFO L225 Difference]: With dead ends: 2778 [2020-10-15 03:42:49,543 INFO L226 Difference]: Without dead ends: 2277 [2020-10-15 03:42:49,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:42:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-10-15 03:42:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 707. [2020-10-15 03:42:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-15 03:42:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1052 transitions. [2020-10-15 03:42:49,636 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1052 transitions. Word has length 60 [2020-10-15 03:42:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:49,637 INFO L479 AbstractCegarLoop]: Abstraction has 707 states and 1052 transitions. [2020-10-15 03:42:49,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:42:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1052 transitions. [2020-10-15 03:42:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-15 03:42:49,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:49,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:49,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:42:49,639 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1548904491, now seen corresponding path program 1 times [2020-10-15 03:42:49,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:49,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430473077] [2020-10-15 03:42:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:49,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:54,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:54,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-15 03:42:54,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:42:54,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 03:42:54,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:54,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:54,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:54,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:54,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:54,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:42:54,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:54,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:42:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:42:54,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:42:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:54,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430473077] [2020-10-15 03:42:54,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:42:54,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:42:54,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915546646] [2020-10-15 03:42:54,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:42:54,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:42:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:42:54,968 INFO L87 Difference]: Start difference. First operand 707 states and 1052 transitions. Second operand 8 states. [2020-10-15 03:42:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:56,377 INFO L93 Difference]: Finished difference Result 2562 states and 3846 transitions. [2020-10-15 03:42:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:42:56,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-15 03:42:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:56,388 INFO L225 Difference]: With dead ends: 2562 [2020-10-15 03:42:56,388 INFO L226 Difference]: Without dead ends: 1977 [2020-10-15 03:42:56,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:42:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2020-10-15 03:42:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 735. [2020-10-15 03:42:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-15 03:42:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1068 transitions. [2020-10-15 03:42:56,475 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1068 transitions. Word has length 61 [2020-10-15 03:42:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:56,475 INFO L479 AbstractCegarLoop]: Abstraction has 735 states and 1068 transitions. [2020-10-15 03:42:56,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:42:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1068 transitions. [2020-10-15 03:42:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 03:42:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:56,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:42:56,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:42:56,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:56,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1898860498, now seen corresponding path program 1 times [2020-10-15 03:42:56,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:56,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747745208] [2020-10-15 03:42:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:56,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:56,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:58,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:58,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:59,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:59,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:01,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:01,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 03:43:01,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:43:01,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:43:01,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:01,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:43:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:43:01,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:43:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:01,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:01,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:01,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 03:43:01,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:01,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:43:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:01,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747745208] [2020-10-15 03:43:01,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:01,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 03:43:01,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441315674] [2020-10-15 03:43:01,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:43:01,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:43:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:43:01,730 INFO L87 Difference]: Start difference. First operand 735 states and 1068 transitions. Second operand 9 states. [2020-10-15 03:43:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:03,530 INFO L93 Difference]: Finished difference Result 3916 states and 5755 transitions. [2020-10-15 03:43:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 03:43:03,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-15 03:43:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:03,546 INFO L225 Difference]: With dead ends: 3916 [2020-10-15 03:43:03,546 INFO L226 Difference]: Without dead ends: 3415 [2020-10-15 03:43:03,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-15 03:43:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2020-10-15 03:43:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 737. [2020-10-15 03:43:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-15 03:43:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1070 transitions. [2020-10-15 03:43:03,652 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1070 transitions. Word has length 62 [2020-10-15 03:43:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:03,652 INFO L479 AbstractCegarLoop]: Abstraction has 737 states and 1070 transitions. [2020-10-15 03:43:03,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:43:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1070 transitions. [2020-10-15 03:43:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 03:43:03,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:03,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:03,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:43:03,655 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1628923327, now seen corresponding path program 1 times [2020-10-15 03:43:03,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:03,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21624492] [2020-10-15 03:43:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:03,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:03,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:05,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:05,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:08,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:08,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:08,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 03:43:08,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-15 03:43:08,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:43:08,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:08,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:43:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:43:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 03:43:08,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:43:09,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:09,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:09,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:43:09,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:09,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:43:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:09,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:43:09,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:09,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21624492] [2020-10-15 03:43:09,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:09,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:43:09,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438615748] [2020-10-15 03:43:09,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:43:09,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:09,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:43:09,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:43:09,044 INFO L87 Difference]: Start difference. First operand 737 states and 1070 transitions. Second operand 8 states. [2020-10-15 03:43:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:11,175 INFO L93 Difference]: Finished difference Result 4686 states and 6871 transitions. [2020-10-15 03:43:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 03:43:11,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-15 03:43:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:11,194 INFO L225 Difference]: With dead ends: 4686 [2020-10-15 03:43:11,194 INFO L226 Difference]: Without dead ends: 4137 [2020-10-15 03:43:11,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:43:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2020-10-15 03:43:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 726. [2020-10-15 03:43:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-10-15 03:43:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1025 transitions. [2020-10-15 03:43:11,325 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1025 transitions. Word has length 62 [2020-10-15 03:43:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:11,325 INFO L479 AbstractCegarLoop]: Abstraction has 726 states and 1025 transitions. [2020-10-15 03:43:11,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:43:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1025 transitions. [2020-10-15 03:43:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-15 03:43:11,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:11,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:11,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:43:11,327 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2028684726, now seen corresponding path program 1 times [2020-10-15 03:43:11,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:11,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227588886] [2020-10-15 03:43:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:11,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:12,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:13,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:16,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:16,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:43:16,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:43:16,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 03:43:16,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:16,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:16,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:16,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:16,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:16,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:43:16,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:16,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:43:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:16,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:43:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:16,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227588886] [2020-10-15 03:43:16,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:16,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:43:16,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479764438] [2020-10-15 03:43:16,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:43:16,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:43:16,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:43:16,689 INFO L87 Difference]: Start difference. First operand 726 states and 1025 transitions. Second operand 8 states. [2020-10-15 03:43:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:18,591 INFO L93 Difference]: Finished difference Result 3437 states and 4926 transitions. [2020-10-15 03:43:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 03:43:18,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-15 03:43:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:18,601 INFO L225 Difference]: With dead ends: 3437 [2020-10-15 03:43:18,602 INFO L226 Difference]: Without dead ends: 2864 [2020-10-15 03:43:18,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:43:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2020-10-15 03:43:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 730. [2020-10-15 03:43:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-10-15 03:43:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1029 transitions. [2020-10-15 03:43:18,730 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1029 transitions. Word has length 63 [2020-10-15 03:43:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:18,730 INFO L479 AbstractCegarLoop]: Abstraction has 730 states and 1029 transitions. [2020-10-15 03:43:18,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:43:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1029 transitions. [2020-10-15 03:43:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 03:43:18,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:18,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:18,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:43:18,733 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -622803128, now seen corresponding path program 1 times [2020-10-15 03:43:18,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:18,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052842158] [2020-10-15 03:43:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:19,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:21,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:22,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:23,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:23,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:23,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 03:43:23,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:43:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:23,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:23,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:23,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:23,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:43:23,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:23,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052842158] [2020-10-15 03:43:23,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:23,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 03:43:23,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68603450] [2020-10-15 03:43:23,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:43:23,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:43:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:43:23,952 INFO L87 Difference]: Start difference. First operand 730 states and 1029 transitions. Second operand 9 states. [2020-10-15 03:43:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:26,155 INFO L93 Difference]: Finished difference Result 3993 states and 5718 transitions. [2020-10-15 03:43:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 03:43:26,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-15 03:43:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:26,167 INFO L225 Difference]: With dead ends: 3993 [2020-10-15 03:43:26,167 INFO L226 Difference]: Without dead ends: 3492 [2020-10-15 03:43:26,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-15 03:43:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2020-10-15 03:43:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 732. [2020-10-15 03:43:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-15 03:43:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1031 transitions. [2020-10-15 03:43:26,303 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1031 transitions. Word has length 64 [2020-10-15 03:43:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:26,303 INFO L479 AbstractCegarLoop]: Abstraction has 732 states and 1031 transitions. [2020-10-15 03:43:26,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:43:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1031 transitions. [2020-10-15 03:43:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 03:43:26,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:26,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:26,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:43:26,306 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:26,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1413071309, now seen corresponding path program 1 times [2020-10-15 03:43:26,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:26,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516467339] [2020-10-15 03:43:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:26,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:26,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:27,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:27,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 03:43:27,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:43:27,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:43:27,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:28,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:28,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:28,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:43:28,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:28,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:43:28,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:28,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516467339] [2020-10-15 03:43:28,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:28,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:43:28,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116961167] [2020-10-15 03:43:28,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:43:28,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:28,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:43:28,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:43:28,265 INFO L87 Difference]: Start difference. First operand 732 states and 1031 transitions. Second operand 10 states. [2020-10-15 03:43:28,417 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-15 03:43:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:30,314 INFO L93 Difference]: Finished difference Result 3328 states and 4822 transitions. [2020-10-15 03:43:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 03:43:30,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-15 03:43:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:30,328 INFO L225 Difference]: With dead ends: 3328 [2020-10-15 03:43:30,329 INFO L226 Difference]: Without dead ends: 3094 [2020-10-15 03:43:30,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:43:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2020-10-15 03:43:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 830. [2020-10-15 03:43:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2020-10-15 03:43:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1165 transitions. [2020-10-15 03:43:30,489 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1165 transitions. Word has length 64 [2020-10-15 03:43:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:30,489 INFO L479 AbstractCegarLoop]: Abstraction has 830 states and 1165 transitions. [2020-10-15 03:43:30,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:43:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1165 transitions. [2020-10-15 03:43:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 03:43:30,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:30,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:30,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:43:30,492 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1513561638, now seen corresponding path program 1 times [2020-10-15 03:43:30,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:30,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13133265] [2020-10-15 03:43:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:32,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:35,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:35,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 03:43:35,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:43:35,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:43:35,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:35,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:43:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:43:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 03:43:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:35,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:43:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:43:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:35,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13133265] [2020-10-15 03:43:35,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:35,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:43:35,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163184433] [2020-10-15 03:43:35,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:43:35,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:43:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:43:35,760 INFO L87 Difference]: Start difference. First operand 830 states and 1165 transitions. Second operand 9 states. [2020-10-15 03:43:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:39,826 INFO L93 Difference]: Finished difference Result 8733 states and 12572 transitions. [2020-10-15 03:43:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 03:43:39,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-15 03:43:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:39,849 INFO L225 Difference]: With dead ends: 8733 [2020-10-15 03:43:39,850 INFO L226 Difference]: Without dead ends: 8166 [2020-10-15 03:43:39,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2020-10-15 03:43:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8166 states. [2020-10-15 03:43:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8166 to 831. [2020-10-15 03:43:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-10-15 03:43:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1166 transitions. [2020-10-15 03:43:40,105 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1166 transitions. Word has length 64 [2020-10-15 03:43:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:40,105 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 1166 transitions. [2020-10-15 03:43:40,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:43:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1166 transitions. [2020-10-15 03:43:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 03:43:40,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:40,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:40,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:43:40,107 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1327092907, now seen corresponding path program 1 times [2020-10-15 03:43:40,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:40,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786559938] [2020-10-15 03:43:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:40,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:42,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:42,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 03:43:42,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:43:42,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-15 03:43:42,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:42,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:42,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:43:42,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:43:42,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 03:43:42,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:42,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:42,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:42,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:42,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:42,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:42,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:43:42,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:42,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:43:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:42,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:43:42,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:42,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786559938] [2020-10-15 03:43:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:43:42,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747728549] [2020-10-15 03:43:42,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:43:42,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:43:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:43:42,820 INFO L87 Difference]: Start difference. First operand 831 states and 1166 transitions. Second operand 10 states. [2020-10-15 03:43:42,982 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 03:43:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:45,400 INFO L93 Difference]: Finished difference Result 3640 states and 5260 transitions. [2020-10-15 03:43:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 03:43:45,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-15 03:43:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:45,408 INFO L225 Difference]: With dead ends: 3640 [2020-10-15 03:43:45,408 INFO L226 Difference]: Without dead ends: 3376 [2020-10-15 03:43:45,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:43:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2020-10-15 03:43:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 963. [2020-10-15 03:43:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2020-10-15 03:43:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1344 transitions. [2020-10-15 03:43:45,671 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1344 transitions. Word has length 64 [2020-10-15 03:43:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:45,671 INFO L479 AbstractCegarLoop]: Abstraction has 963 states and 1344 transitions. [2020-10-15 03:43:45,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:43:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1344 transitions. [2020-10-15 03:43:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 03:43:45,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:45,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:45,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:43:45,678 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1697157225, now seen corresponding path program 1 times [2020-10-15 03:43:45,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:45,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288594355] [2020-10-15 03:43:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:45,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:46,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:46,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:48,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:48,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 03:43:48,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:43:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2329 [2020-10-15 03:43:48,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:48,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:43:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:43:48,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 03:43:48,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:48,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:48,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:43:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:48,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288594355] [2020-10-15 03:43:48,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:48,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:43:48,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106044875] [2020-10-15 03:43:48,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:43:48,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:43:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:43:48,296 INFO L87 Difference]: Start difference. First operand 963 states and 1344 transitions. Second operand 10 states. [2020-10-15 03:43:48,434 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:43:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:43:50,636 INFO L93 Difference]: Finished difference Result 3631 states and 5266 transitions. [2020-10-15 03:43:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:43:50,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-15 03:43:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:43:50,643 INFO L225 Difference]: With dead ends: 3631 [2020-10-15 03:43:50,643 INFO L226 Difference]: Without dead ends: 2875 [2020-10-15 03:43:50,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:43:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2020-10-15 03:43:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1236. [2020-10-15 03:43:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-10-15 03:43:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1730 transitions. [2020-10-15 03:43:51,076 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1730 transitions. Word has length 65 [2020-10-15 03:43:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:43:51,077 INFO L479 AbstractCegarLoop]: Abstraction has 1236 states and 1730 transitions. [2020-10-15 03:43:51,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:43:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1730 transitions. [2020-10-15 03:43:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:43:51,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:43:51,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:43:51,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:43:51,079 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:43:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:43:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1599789656, now seen corresponding path program 1 times [2020-10-15 03:43:51,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:43:51,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255949945] [2020-10-15 03:43:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:43:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:51,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:51,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:51,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:51,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:52,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:52,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:55,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:55,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4751 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 03:43:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:43:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:43:56,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:43:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:43:56,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:43:56,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:43:56,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:43:56,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:43:56,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:43:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:43:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:43:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:43:56,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255949945] [2020-10-15 03:43:56,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:43:56,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:43:56,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758592823] [2020-10-15 03:43:56,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:43:56,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:43:56,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:43:56,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:43:56,212 INFO L87 Difference]: Start difference. First operand 1236 states and 1730 transitions. Second operand 10 states. [2020-10-15 03:43:56,365 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:44:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:00,664 INFO L93 Difference]: Finished difference Result 9736 states and 14296 transitions. [2020-10-15 03:44:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:44:00,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-15 03:44:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:00,679 INFO L225 Difference]: With dead ends: 9736 [2020-10-15 03:44:00,679 INFO L226 Difference]: Without dead ends: 9330 [2020-10-15 03:44:00,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-15 03:44:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2020-10-15 03:44:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 1088. [2020-10-15 03:44:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1088 states. [2020-10-15 03:44:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1533 transitions. [2020-10-15 03:44:01,115 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1533 transitions. Word has length 66 [2020-10-15 03:44:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:01,116 INFO L479 AbstractCegarLoop]: Abstraction has 1088 states and 1533 transitions. [2020-10-15 03:44:01,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:44:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1533 transitions. [2020-10-15 03:44:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 03:44:01,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:01,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:01,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:44:01,118 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2099063966, now seen corresponding path program 1 times [2020-10-15 03:44:01,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:01,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228768920] [2020-10-15 03:44:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:01,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:01,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:02,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1577 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:44:02,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 03:44:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:02,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:02,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:44:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:44:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:02,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228768920] [2020-10-15 03:44:02,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:02,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:44:02,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875788738] [2020-10-15 03:44:02,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:44:02,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:44:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:44:02,870 INFO L87 Difference]: Start difference. First operand 1088 states and 1533 transitions. Second operand 6 states. [2020-10-15 03:44:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:04,071 INFO L93 Difference]: Finished difference Result 2911 states and 4138 transitions. [2020-10-15 03:44:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:44:04,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-15 03:44:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:04,074 INFO L225 Difference]: With dead ends: 2911 [2020-10-15 03:44:04,074 INFO L226 Difference]: Without dead ends: 2025 [2020-10-15 03:44:04,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:44:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2020-10-15 03:44:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1624. [2020-10-15 03:44:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-10-15 03:44:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2251 transitions. [2020-10-15 03:44:04,506 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2251 transitions. Word has length 73 [2020-10-15 03:44:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:04,507 INFO L479 AbstractCegarLoop]: Abstraction has 1624 states and 2251 transitions. [2020-10-15 03:44:04,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:44:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2251 transitions. [2020-10-15 03:44:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 03:44:04,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:04,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:04,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:44:04,510 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1140678219, now seen corresponding path program 1 times [2020-10-15 03:44:04,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:04,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304240976] [2020-10-15 03:44:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:04,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:06,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:44:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:44:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 03:44:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:06,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:06,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:06,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:44:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:06,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304240976] [2020-10-15 03:44:06,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:06,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:44:06,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358098842] [2020-10-15 03:44:06,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:44:06,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:44:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:44:06,533 INFO L87 Difference]: Start difference. First operand 1624 states and 2251 transitions. Second operand 6 states. [2020-10-15 03:44:06,672 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:44:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:07,947 INFO L93 Difference]: Finished difference Result 3424 states and 4888 transitions. [2020-10-15 03:44:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:44:07,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-15 03:44:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:07,950 INFO L225 Difference]: With dead ends: 3424 [2020-10-15 03:44:07,951 INFO L226 Difference]: Without dead ends: 2285 [2020-10-15 03:44:07,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:44:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-10-15 03:44:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-10-15 03:44:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-10-15 03:44:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3229 transitions. [2020-10-15 03:44:08,640 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3229 transitions. Word has length 74 [2020-10-15 03:44:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:08,640 INFO L479 AbstractCegarLoop]: Abstraction has 2283 states and 3229 transitions. [2020-10-15 03:44:08,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:44:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3229 transitions. [2020-10-15 03:44:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 03:44:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:08,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:08,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:44:08,643 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1998228090, now seen corresponding path program 1 times [2020-10-15 03:44:08,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:08,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026308007] [2020-10-15 03:44:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:08,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:08,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:09,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:10,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1498 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:44:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 03:44:10,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:10,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:10,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:10,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:10,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:44:10,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:10,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026308007] [2020-10-15 03:44:10,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:10,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:44:10,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931073932] [2020-10-15 03:44:10,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:44:10,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:44:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:44:10,304 INFO L87 Difference]: Start difference. First operand 2283 states and 3229 transitions. Second operand 6 states. [2020-10-15 03:44:10,442 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:44:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:12,235 INFO L93 Difference]: Finished difference Result 5883 states and 8475 transitions. [2020-10-15 03:44:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:44:12,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-15 03:44:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:12,239 INFO L225 Difference]: With dead ends: 5883 [2020-10-15 03:44:12,239 INFO L226 Difference]: Without dead ends: 3954 [2020-10-15 03:44:12,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:44:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2020-10-15 03:44:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3952. [2020-10-15 03:44:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3952 states. [2020-10-15 03:44:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 5649 transitions. [2020-10-15 03:44:13,397 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 5649 transitions. Word has length 74 [2020-10-15 03:44:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:13,397 INFO L479 AbstractCegarLoop]: Abstraction has 3952 states and 5649 transitions. [2020-10-15 03:44:13,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:44:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 5649 transitions. [2020-10-15 03:44:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 03:44:13,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:13,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:13,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 03:44:13,401 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash -951459159, now seen corresponding path program 1 times [2020-10-15 03:44:13,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:13,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676966974] [2020-10-15 03:44:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:13,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:13,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1522 [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:14,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:44:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:44:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:44:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:15,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:15,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:44:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:15,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:44:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:44:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:15,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676966974] [2020-10-15 03:44:15,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:15,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:44:15,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599717513] [2020-10-15 03:44:15,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:44:15,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:44:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:44:15,106 INFO L87 Difference]: Start difference. First operand 3952 states and 5649 transitions. Second operand 6 states. [2020-10-15 03:44:15,242 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:44:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:18,013 INFO L93 Difference]: Finished difference Result 10679 states and 15511 transitions. [2020-10-15 03:44:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:44:18,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-15 03:44:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:18,023 INFO L225 Difference]: With dead ends: 10679 [2020-10-15 03:44:18,023 INFO L226 Difference]: Without dead ends: 7115 [2020-10-15 03:44:18,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:44:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2020-10-15 03:44:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 7113. [2020-10-15 03:44:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7113 states. [2020-10-15 03:44:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 10231 transitions. [2020-10-15 03:44:20,166 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 10231 transitions. Word has length 74 [2020-10-15 03:44:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:20,166 INFO L479 AbstractCegarLoop]: Abstraction has 7113 states and 10231 transitions. [2020-10-15 03:44:20,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:44:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 10231 transitions. [2020-10-15 03:44:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 03:44:20,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:20,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:20,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 03:44:20,170 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -371631891, now seen corresponding path program 1 times [2020-10-15 03:44:20,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:20,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241438977] [2020-10-15 03:44:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:20,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:20,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:20,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:25,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:25,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 03:44:25,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:44:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-15 03:44:25,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:25,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:44:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:44:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 03:44:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:25,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:25,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:25,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:44:25,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:25,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:44:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:44:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:25,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241438977] [2020-10-15 03:44:25,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:25,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:44:25,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416656740] [2020-10-15 03:44:25,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:44:25,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:44:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:44:25,501 INFO L87 Difference]: Start difference. First operand 7113 states and 10231 transitions. Second operand 9 states. [2020-10-15 03:44:25,661 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 03:44:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:31,907 INFO L93 Difference]: Finished difference Result 17464 states and 25111 transitions. [2020-10-15 03:44:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:44:31,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-15 03:44:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:31,922 INFO L225 Difference]: With dead ends: 17464 [2020-10-15 03:44:31,923 INFO L226 Difference]: Without dead ends: 14727 [2020-10-15 03:44:31,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 03:44:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14727 states. [2020-10-15 03:44:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14727 to 7113. [2020-10-15 03:44:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7113 states. [2020-10-15 03:44:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 10225 transitions. [2020-10-15 03:44:34,186 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 10225 transitions. Word has length 75 [2020-10-15 03:44:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:34,186 INFO L479 AbstractCegarLoop]: Abstraction has 7113 states and 10225 transitions. [2020-10-15 03:44:34,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:44:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 10225 transitions. [2020-10-15 03:44:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 03:44:34,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:34,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:34,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 03:44:34,190 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 747549005, now seen corresponding path program 1 times [2020-10-15 03:44:34,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:34,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642648786] [2020-10-15 03:44:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:34,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:34,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:38,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:38,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 03:44:38,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4704 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 03:44:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:39,057 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-15 03:44:39,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:39,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:39,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:44:39,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:39,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642648786] [2020-10-15 03:44:39,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:39,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:44:39,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568741596] [2020-10-15 03:44:39,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:44:39,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:44:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:44:39,214 INFO L87 Difference]: Start difference. First operand 7113 states and 10225 transitions. Second operand 9 states. [2020-10-15 03:44:39,390 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 03:44:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:44:51,225 INFO L93 Difference]: Finished difference Result 34004 states and 49238 transitions. [2020-10-15 03:44:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 03:44:51,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-15 03:44:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:44:51,261 INFO L225 Difference]: With dead ends: 34004 [2020-10-15 03:44:51,261 INFO L226 Difference]: Without dead ends: 29928 [2020-10-15 03:44:51,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 03:44:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29928 states. [2020-10-15 03:44:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29928 to 7180. [2020-10-15 03:44:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7180 states. [2020-10-15 03:44:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 10305 transitions. [2020-10-15 03:44:53,846 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 10305 transitions. Word has length 75 [2020-10-15 03:44:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:44:53,847 INFO L479 AbstractCegarLoop]: Abstraction has 7180 states and 10305 transitions. [2020-10-15 03:44:53,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:44:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 10305 transitions. [2020-10-15 03:44:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 03:44:53,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:44:53,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:44:53,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 03:44:53,851 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:44:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:44:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2007217747, now seen corresponding path program 1 times [2020-10-15 03:44:53,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:44:53,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706812584] [2020-10-15 03:44:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:44:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:53,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:53,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:54,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:58,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 03:44:58,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:44:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:44:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:44:59,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:44:59,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:44:59,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:44:59,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:44:59,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:44:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:44:59,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706812584] [2020-10-15 03:44:59,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:44:59,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:44:59,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359991444] [2020-10-15 03:44:59,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:44:59,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:44:59,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:44:59,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:44:59,164 INFO L87 Difference]: Start difference. First operand 7180 states and 10305 transitions. Second operand 9 states. [2020-10-15 03:44:59,323 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 03:45:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:45:10,234 INFO L93 Difference]: Finished difference Result 30736 states and 44312 transitions. [2020-10-15 03:45:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 03:45:10,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-15 03:45:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:45:10,260 INFO L225 Difference]: With dead ends: 30736 [2020-10-15 03:45:10,261 INFO L226 Difference]: Without dead ends: 24270 [2020-10-15 03:45:10,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 03:45:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24270 states. [2020-10-15 03:45:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24270 to 7131. [2020-10-15 03:45:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7131 states. [2020-10-15 03:45:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 10233 transitions. [2020-10-15 03:45:12,828 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 10233 transitions. Word has length 75 [2020-10-15 03:45:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:45:12,828 INFO L479 AbstractCegarLoop]: Abstraction has 7131 states and 10233 transitions. [2020-10-15 03:45:12,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:45:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 10233 transitions. [2020-10-15 03:45:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 03:45:12,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:45:12,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:45:12,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 03:45:12,832 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:45:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:45:12,832 INFO L82 PathProgramCache]: Analyzing trace with hash -856661698, now seen corresponding path program 1 times [2020-10-15 03:45:12,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:45:12,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8470930] [2020-10-15 03:45:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:45:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:45:12,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:12,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:12,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:13,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:45:13,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 03:45:13,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:45:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-15 03:45:13,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:45:13,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:45:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:45:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-15 03:45:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:45:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:45:13,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:45:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:45:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:45:13,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:45:13,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:45:13,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:45:13,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:45:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:45:13,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8470930] [2020-10-15 03:45:13,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:45:13,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:45:13,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382895376] [2020-10-15 03:45:13,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:45:13,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:45:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:45:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:45:13,465 INFO L87 Difference]: Start difference. First operand 7131 states and 10233 transitions. Second operand 4 states. [2020-10-15 03:45:13,597 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-15 03:45:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:45:18,794 INFO L93 Difference]: Finished difference Result 19195 states and 27767 transitions. [2020-10-15 03:45:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:45:18,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-15 03:45:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:45:18,809 INFO L225 Difference]: With dead ends: 19195 [2020-10-15 03:45:18,810 INFO L226 Difference]: Without dead ends: 12931 [2020-10-15 03:45:18,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:45:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12931 states. [2020-10-15 03:45:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12931 to 12269. [2020-10-15 03:45:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12269 states. [2020-10-15 03:45:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12269 states to 12269 states and 17641 transitions. [2020-10-15 03:45:23,182 INFO L78 Accepts]: Start accepts. Automaton has 12269 states and 17641 transitions. Word has length 76 [2020-10-15 03:45:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:45:23,183 INFO L479 AbstractCegarLoop]: Abstraction has 12269 states and 17641 transitions. [2020-10-15 03:45:23,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:45:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 12269 states and 17641 transitions. [2020-10-15 03:45:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 03:45:23,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:45:23,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:45:23,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 03:45:23,186 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:45:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:45:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1698899758, now seen corresponding path program 1 times [2020-10-15 03:45:23,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:45:23,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967917439] [2020-10-15 03:45:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:45:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:45:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:23,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:23,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:25,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:45:25,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 03:45:25,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 03:45:25,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:45:25,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:45:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:45:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:45:25,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:45:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:45:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:45:25,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:45:25,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:45:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:45:25,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967917439] [2020-10-15 03:45:25,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:45:25,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-15 03:45:25,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776120475] [2020-10-15 03:45:25,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 03:45:25,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:45:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 03:45:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:45:25,555 INFO L87 Difference]: Start difference. First operand 12269 states and 17641 transitions. Second operand 11 states. [2020-10-15 03:45:25,730 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 03:46:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:46:07,650 INFO L93 Difference]: Finished difference Result 114753 states and 166257 transitions. [2020-10-15 03:46:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 03:46:07,650 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-15 03:46:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:46:07,818 INFO L225 Difference]: With dead ends: 114753 [2020-10-15 03:46:07,818 INFO L226 Difference]: Without dead ends: 103351 [2020-10-15 03:46:07,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 03:46:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103351 states. [2020-10-15 03:46:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103351 to 13409. [2020-10-15 03:46:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13409 states. [2020-10-15 03:46:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 19247 transitions. [2020-10-15 03:46:15,205 INFO L78 Accepts]: Start accepts. Automaton has 13409 states and 19247 transitions. Word has length 77 [2020-10-15 03:46:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:46:15,205 INFO L479 AbstractCegarLoop]: Abstraction has 13409 states and 19247 transitions. [2020-10-15 03:46:15,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 03:46:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13409 states and 19247 transitions. [2020-10-15 03:46:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 03:46:15,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:46:15,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-10-15 03:46:15,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 03:46:15,210 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:46:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:46:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2139002404, now seen corresponding path program 1 times [2020-10-15 03:46:15,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:46:15,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048340307] [2020-10-15 03:46:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:46:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:46:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:46:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:46:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:46:15,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:46:15,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 03:46:15,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:46:15,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-15 03:46:15,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:46:15,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:46:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:46:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-15 03:46:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 03:46:15,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0