/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=NARROWEST --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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:11:18,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:11:18,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:11:18,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:11:18,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:11:18,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:11:18,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:11:18,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:11:18,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:11:18,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:11:18,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:11:18,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:11:18,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:11:18,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:11:18,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:11:18,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:11:18,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:11:18,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:11:18,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:11:18,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:11:18,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:11:18,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:11:18,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:11:18,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:11:18,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:11:18,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:11:18,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:11:18,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:11:18,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:11:18,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:11:18,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:11:18,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:11:18,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:11:18,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:11:18,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:11:18,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:11:18,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:11:18,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:11:18,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:11:18,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:11:18,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:11:18,206 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 [2020-10-13 14:11:18,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:11:18,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:11:18,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:11:18,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:11:18,249 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:11:18,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:11:18,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:11:18,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:11:18,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:11:18,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:11:18,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:11:18,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:11:18,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:11:18,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:11:18,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:11:18,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:11:18,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:11:18,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:11:18,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:11:18,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:11:18,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:11:18,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:11:18,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:11:18,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:11:18,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:11:18,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:11:18,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:11:18,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:11:18,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:11:18,255 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:11:18,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:11:18,587 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:11:18,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:11:18,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:11:18,598 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:11:18,599 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:11:18,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f091a84a5/4cc6ea89ec0f4eb88fb0d794ae1cac06/FLAGe6f75c29a [2020-10-13 14:11:19,106 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:11:19,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:11:19,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f091a84a5/4cc6ea89ec0f4eb88fb0d794ae1cac06/FLAGe6f75c29a [2020-10-13 14:11:19,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f091a84a5/4cc6ea89ec0f4eb88fb0d794ae1cac06 [2020-10-13 14:11:19,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:11:19,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:11:19,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:11:19,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:11:19,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:11:19,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4a5394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19, skipping insertion in model container [2020-10-13 14:11:19,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:11:19,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:11:19,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:11:19,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:11:19,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:11:19,940 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:11:19,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19 WrapperNode [2020-10-13 14:11:19,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:11:19,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:11:19,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:11:19,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:11:19,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (1/1) ... [2020-10-13 14:11:19,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:11:19,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:11:19,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:11:19,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:11:19,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (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 [2020-10-13 14:11:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:11:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:11:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:11:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:11:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:11:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:11:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:11:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:11:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:11:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:11:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:11:20,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:11:20,640 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:11:20,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:11:20 BoogieIcfgContainer [2020-10-13 14:11:20,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:11:20,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:11:20,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:11:20,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:11:20,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:11:19" (1/3) ... [2020-10-13 14:11:20,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f058ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:11:20, skipping insertion in model container [2020-10-13 14:11:20,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:11:19" (2/3) ... [2020-10-13 14:11:20,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f058ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:11:20, skipping insertion in model container [2020-10-13 14:11:20,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:11:20" (3/3) ... [2020-10-13 14:11:20,662 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:11:20,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:11:20,686 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:11:20,701 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:11:20,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:11:20,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:11:20,734 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:11:20,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:11:20,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:11:20,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:11:20,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:11:20,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:11:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-10-13 14:11:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 14:11:20,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:20,764 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] [2020-10-13 14:11:20,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 542345027, now seen corresponding path program 1 times [2020-10-13 14:11:20,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:20,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214301072] [2020-10-13 14:11:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:21,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:24,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:24,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 14:11:24,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:11:24,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3106 [2020-10-13 14:11:24,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:11:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:11:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:11:24,470 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:24,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:24,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:24,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:24,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:24,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:24,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:11:24,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:24,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:24,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:24,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:24,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:11:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:24,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214301072] [2020-10-13 14:11:24,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:24,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:24,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672907297] [2020-10-13 14:11:24,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:24,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:24,566 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-10-13 14:11:24,765 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:11:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:25,302 INFO L93 Difference]: Finished difference Result 184 states and 293 transitions. [2020-10-13 14:11:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:11:25,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-13 14:11:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:25,317 INFO L225 Difference]: With dead ends: 184 [2020-10-13 14:11:25,318 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 14:11:25,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:11:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 14:11:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-13 14:11:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 14:11:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2020-10-13 14:11:25,385 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 51 [2020-10-13 14:11:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:25,386 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2020-10-13 14:11:25,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2020-10-13 14:11:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:11:25,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:25,388 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] [2020-10-13 14:11:25,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:11:25,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:25,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2107395660, now seen corresponding path program 1 times [2020-10-13 14:11:25,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:25,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986814206] [2020-10-13 14:11:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:25,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:26,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:26,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:11:26,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:11:26,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-13 14:11:26,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:11:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:11:26,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:26,670 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:26,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:26,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:26,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:26,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:26,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:11:26,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:26,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:26,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986814206] [2020-10-13 14:11:26,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:26,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:26,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528605094] [2020-10-13 14:11:26,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:26,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:26,715 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand 4 states. [2020-10-13 14:11:26,890 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:11:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:27,260 INFO L93 Difference]: Finished difference Result 284 states and 433 transitions. [2020-10-13 14:11:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:11:27,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:11:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:27,263 INFO L225 Difference]: With dead ends: 284 [2020-10-13 14:11:27,264 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 14:11:27,265 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 [2020-10-13 14:11:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 14:11:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-13 14:11:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 14:11:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 287 transitions. [2020-10-13 14:11:27,287 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 287 transitions. Word has length 52 [2020-10-13 14:11:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:27,288 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 287 transitions. [2020-10-13 14:11:27,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 287 transitions. [2020-10-13 14:11:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:11:27,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:27,290 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] [2020-10-13 14:11:27,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:11:27,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:27,291 INFO L82 PathProgramCache]: Analyzing trace with hash 844287665, now seen corresponding path program 1 times [2020-10-13 14:11:27,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:27,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780791369] [2020-10-13 14:11:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:27,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:27,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:27,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:11:27,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:11:27,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-13 14:11:27,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:11:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:11:27,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:28,126 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:28,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:28,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:28,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:28,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:28,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:11:28,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:28,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:28,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780791369] [2020-10-13 14:11:28,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:28,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:28,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084880229] [2020-10-13 14:11:28,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:28,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:28,160 INFO L87 Difference]: Start difference. First operand 192 states and 287 transitions. Second operand 4 states. [2020-10-13 14:11:28,346 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:11:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:28,714 INFO L93 Difference]: Finished difference Result 484 states and 749 transitions. [2020-10-13 14:11:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:11:28,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:11:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:28,717 INFO L225 Difference]: With dead ends: 484 [2020-10-13 14:11:28,717 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 14:11:28,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:11:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 14:11:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2020-10-13 14:11:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-13 14:11:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 487 transitions. [2020-10-13 14:11:28,745 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 487 transitions. Word has length 53 [2020-10-13 14:11:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:28,746 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 487 transitions. [2020-10-13 14:11:28,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 487 transitions. [2020-10-13 14:11:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:11:28,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:28,748 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] [2020-10-13 14:11:28,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:11:28,748 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash 337531448, now seen corresponding path program 1 times [2020-10-13 14:11:28,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:28,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060541573] [2020-10-13 14:11:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:29,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:29,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:11:29,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:11:29,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-13 14:11:29,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:11:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:11:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:30,106 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:30,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:30,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:30,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:30,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:30,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:30,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:11:30,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:30,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:11:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:30,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060541573] [2020-10-13 14:11:30,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:30,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:30,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257070205] [2020-10-13 14:11:30,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:30,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:30,164 INFO L87 Difference]: Start difference. First operand 320 states and 487 transitions. Second operand 4 states. [2020-10-13 14:11:30,323 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:11:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:30,790 INFO L93 Difference]: Finished difference Result 836 states and 1297 transitions. [2020-10-13 14:11:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:11:30,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:11:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:30,795 INFO L225 Difference]: With dead ends: 836 [2020-10-13 14:11:30,796 INFO L226 Difference]: Without dead ends: 546 [2020-10-13 14:11:30,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:11:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-13 14:11:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-10-13 14:11:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-10-13 14:11:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 831 transitions. [2020-10-13 14:11:30,834 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 831 transitions. Word has length 54 [2020-10-13 14:11:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:30,834 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 831 transitions. [2020-10-13 14:11:30,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 831 transitions. [2020-10-13 14:11:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:11:30,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:30,836 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] [2020-10-13 14:11:30,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:11:30,837 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1377694483, now seen corresponding path program 1 times [2020-10-13 14:11:30,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:30,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100187639] [2020-10-13 14:11:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:34,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:34,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:11:34,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:11:34,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3616 [2020-10-13 14:11:34,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:34,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:11:34,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:11:34,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:11:34,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:34,742 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:34,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:34,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:34,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:11:34,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:34,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:34,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:34,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100187639] [2020-10-13 14:11:34,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:34,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:11:34,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721947717] [2020-10-13 14:11:34,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:11:34,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:11:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:11:34,786 INFO L87 Difference]: Start difference. First operand 544 states and 831 transitions. Second operand 7 states. [2020-10-13 14:11:35,028 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:11:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:36,345 INFO L93 Difference]: Finished difference Result 4632 states and 7191 transitions. [2020-10-13 14:11:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:11:36,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:11:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:36,382 INFO L225 Difference]: With dead ends: 4632 [2020-10-13 14:11:36,383 INFO L226 Difference]: Without dead ends: 4118 [2020-10-13 14:11:36,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:11:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-10-13 14:11:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 1552. [2020-10-13 14:11:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2020-10-13 14:11:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2391 transitions. [2020-10-13 14:11:36,656 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2391 transitions. Word has length 55 [2020-10-13 14:11:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:36,657 INFO L479 AbstractCegarLoop]: Abstraction has 1552 states and 2391 transitions. [2020-10-13 14:11:36,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:11:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2391 transitions. [2020-10-13 14:11:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:11:36,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:36,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:36,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:11:36,665 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1643404808, now seen corresponding path program 1 times [2020-10-13 14:11:36,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:36,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712943581] [2020-10-13 14:11:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:36,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:37,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:37,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:11:37,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:11:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-13 14:11:37,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:37,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:11:37,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:11:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:11:37,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:37,569 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:37,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:37,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:37,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:37,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:37,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:37,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:11:37,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:37,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:37,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:11:37,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:37,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712943581] [2020-10-13 14:11:37,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:37,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:11:37,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055464808] [2020-10-13 14:11:37,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:11:37,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:11:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:11:37,612 INFO L87 Difference]: Start difference. First operand 1552 states and 2391 transitions. Second operand 6 states. [2020-10-13 14:11:37,765 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:11:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:38,319 INFO L93 Difference]: Finished difference Result 3572 states and 5513 transitions. [2020-10-13 14:11:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:11:38,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:11:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:38,332 INFO L225 Difference]: With dead ends: 3572 [2020-10-13 14:11:38,332 INFO L226 Difference]: Without dead ends: 2554 [2020-10-13 14:11:38,335 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 [2020-10-13 14:11:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2020-10-13 14:11:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2048. [2020-10-13 14:11:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2020-10-13 14:11:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3135 transitions. [2020-10-13 14:11:38,522 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3135 transitions. Word has length 55 [2020-10-13 14:11:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:38,523 INFO L479 AbstractCegarLoop]: Abstraction has 2048 states and 3135 transitions. [2020-10-13 14:11:38,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:11:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3135 transitions. [2020-10-13 14:11:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:11:38,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:38,525 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] [2020-10-13 14:11:38,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:11:38,525 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash -69335112, now seen corresponding path program 1 times [2020-10-13 14:11:38,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:38,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172348] [2020-10-13 14:11:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:38,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:39,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:39,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:11:39,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:11:39,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-13 14:11:39,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:39,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:11:39,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:11:39,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:11:39,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:39,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:39,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:39,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:39,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:11:39,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:39,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:39,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172348] [2020-10-13 14:11:39,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:39,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:11:39,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014660879] [2020-10-13 14:11:39,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:11:39,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:39,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:11:39,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:11:39,551 INFO L87 Difference]: Start difference. First operand 2048 states and 3135 transitions. Second operand 7 states. [2020-10-13 14:11:39,715 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-13 14:11:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:41,390 INFO L93 Difference]: Finished difference Result 18192 states and 27975 transitions. [2020-10-13 14:11:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:11:41,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:11:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:41,483 INFO L225 Difference]: With dead ends: 18192 [2020-10-13 14:11:41,487 INFO L226 Difference]: Without dead ends: 16174 [2020-10-13 14:11:41,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:11:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2020-10-13 14:11:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 4064. [2020-10-13 14:11:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-13 14:11:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 6111 transitions. [2020-10-13 14:11:41,980 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 6111 transitions. Word has length 55 [2020-10-13 14:11:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:41,981 INFO L479 AbstractCegarLoop]: Abstraction has 4064 states and 6111 transitions. [2020-10-13 14:11:41,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:11:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 6111 transitions. [2020-10-13 14:11:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:11:41,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:41,982 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] [2020-10-13 14:11:41,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:11:41,983 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1215290674, now seen corresponding path program 1 times [2020-10-13 14:11:41,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:41,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414099219] [2020-10-13 14:11:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:42,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:42,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:11:42,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:11:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-13 14:11:42,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:11:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:11:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:11:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:42,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:42,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:42,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:42,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:42,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:42,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:11:42,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:42,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:42,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:42,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414099219] [2020-10-13 14:11:42,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:42,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:11:42,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247514299] [2020-10-13 14:11:42,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:11:42,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:11:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:11:42,946 INFO L87 Difference]: Start difference. First operand 4064 states and 6111 transitions. Second operand 7 states. [2020-10-13 14:11:43,117 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:11:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:44,841 INFO L93 Difference]: Finished difference Result 20208 states and 30439 transitions. [2020-10-13 14:11:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:11:44,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:11:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:44,890 INFO L225 Difference]: With dead ends: 20208 [2020-10-13 14:11:44,890 INFO L226 Difference]: Without dead ends: 16174 [2020-10-13 14:11:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:11:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2020-10-13 14:11:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 4064. [2020-10-13 14:11:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-13 14:11:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 6047 transitions. [2020-10-13 14:11:45,427 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 6047 transitions. Word has length 57 [2020-10-13 14:11:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:45,427 INFO L479 AbstractCegarLoop]: Abstraction has 4064 states and 6047 transitions. [2020-10-13 14:11:45,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:11:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 6047 transitions. [2020-10-13 14:11:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:11:45,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:45,429 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] [2020-10-13 14:11:45,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:11:45,429 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1195241331, now seen corresponding path program 1 times [2020-10-13 14:11:45,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:45,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905137607] [2020-10-13 14:11:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:45,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:45,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:45,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:45,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:11:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:11:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-13 14:11:45,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:11:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:11:45,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:46,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:46,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:46,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:46,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:11:46,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:46,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:46,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905137607] [2020-10-13 14:11:46,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:46,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:46,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023955956] [2020-10-13 14:11:46,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:46,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:46,126 INFO L87 Difference]: Start difference. First operand 4064 states and 6047 transitions. Second operand 4 states. [2020-10-13 14:11:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:46,900 INFO L93 Difference]: Finished difference Result 10244 states and 15201 transitions. [2020-10-13 14:11:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:11:46,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:11:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:46,921 INFO L225 Difference]: With dead ends: 10244 [2020-10-13 14:11:46,921 INFO L226 Difference]: Without dead ends: 6210 [2020-10-13 14:11:46,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2020-10-13 14:11:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 6208. [2020-10-13 14:11:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6208 states. [2020-10-13 14:11:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 8991 transitions. [2020-10-13 14:11:47,525 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 8991 transitions. Word has length 57 [2020-10-13 14:11:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:47,526 INFO L479 AbstractCegarLoop]: Abstraction has 6208 states and 8991 transitions. [2020-10-13 14:11:47,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 8991 transitions. [2020-10-13 14:11:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:11:47,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:47,527 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] [2020-10-13 14:11:47,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:11:47,527 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -982604156, now seen corresponding path program 1 times [2020-10-13 14:11:47,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:47,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585723679] [2020-10-13 14:11:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:47,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:11:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:11:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-13 14:11:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:11:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:11:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:11:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:47,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:47,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:47,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:11:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:47,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:47,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585723679] [2020-10-13 14:11:47,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:47,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:11:47,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514164891] [2020-10-13 14:11:47,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:11:47,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:11:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:11:47,996 INFO L87 Difference]: Start difference. First operand 6208 states and 8991 transitions. Second operand 5 states. [2020-10-13 14:11:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:49,106 INFO L93 Difference]: Finished difference Result 9926 states and 14317 transitions. [2020-10-13 14:11:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:11:49,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:11:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:49,129 INFO L225 Difference]: With dead ends: 9926 [2020-10-13 14:11:49,129 INFO L226 Difference]: Without dead ends: 9924 [2020-10-13 14:11:49,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:11:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2020-10-13 14:11:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 6336. [2020-10-13 14:11:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6336 states. [2020-10-13 14:11:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6336 states to 6336 states and 9055 transitions. [2020-10-13 14:11:49,753 INFO L78 Accepts]: Start accepts. Automaton has 6336 states and 9055 transitions. Word has length 58 [2020-10-13 14:11:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:49,753 INFO L479 AbstractCegarLoop]: Abstraction has 6336 states and 9055 transitions. [2020-10-13 14:11:49,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:11:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6336 states and 9055 transitions. [2020-10-13 14:11:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:11:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:49,754 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, 1] [2020-10-13 14:11:49,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:11:49,755 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1592604672, now seen corresponding path program 1 times [2020-10-13 14:11:49,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:49,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860041976] [2020-10-13 14:11:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:49,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:50,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:50,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:11:50,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:11:50,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-13 14:11:50,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:11:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:11:50,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:11:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:50,317 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:11:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:50,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:50,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:50,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:50,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:11:50,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:50,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:11:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:50,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860041976] [2020-10-13 14:11:50,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:11:50,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:11:50,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606624002] [2020-10-13 14:11:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:11:50,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:11:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:11:50,351 INFO L87 Difference]: Start difference. First operand 6336 states and 9055 transitions. Second operand 4 states. [2020-10-13 14:11:50,483 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 14:11:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:11:51,361 INFO L93 Difference]: Finished difference Result 14566 states and 20899 transitions. [2020-10-13 14:11:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:11:51,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-13 14:11:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:11:51,373 INFO L225 Difference]: With dead ends: 14566 [2020-10-13 14:11:51,374 INFO L226 Difference]: Without dead ends: 8260 [2020-10-13 14:11:51,386 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 [2020-10-13 14:11:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2020-10-13 14:11:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 8258. [2020-10-13 14:11:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8258 states. [2020-10-13 14:11:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8258 states to 8258 states and 11777 transitions. [2020-10-13 14:11:51,975 INFO L78 Accepts]: Start accepts. Automaton has 8258 states and 11777 transitions. Word has length 58 [2020-10-13 14:11:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:11:51,976 INFO L479 AbstractCegarLoop]: Abstraction has 8258 states and 11777 transitions. [2020-10-13 14:11:51,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:11:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8258 states and 11777 transitions. [2020-10-13 14:11:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:11:51,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:11:51,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:11:51,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:11:51,980 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:11:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:11:51,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1818301593, now seen corresponding path program 1 times [2020-10-13 14:11:51,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:11:51,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22926555] [2020-10-13 14:11:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:11:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:53,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:53,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:53,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:56,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:57,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:11:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:11:57,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:11:57,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:57,255 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 21 [2020-10-13 14:11:57,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:11:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:11:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:11:57,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:11:57,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:11:57,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:11:57,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:11:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:11:57,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22926555] [2020-10-13 14:11:57,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:11:57,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 14:11:57,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026390245] [2020-10-13 14:11:57,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:11:57,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:11:57,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:11:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:11:57,437 INFO L87 Difference]: Start difference. First operand 8258 states and 11777 transitions. Second operand 11 states. [2020-10-13 14:12:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:01,126 INFO L93 Difference]: Finished difference Result 22250 states and 31277 transitions. [2020-10-13 14:12:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 14:12:01,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-10-13 14:12:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:01,141 INFO L225 Difference]: With dead ends: 22250 [2020-10-13 14:12:01,141 INFO L226 Difference]: Without dead ends: 14024 [2020-10-13 14:12:01,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 14:12:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14024 states. [2020-10-13 14:12:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14024 to 8290. [2020-10-13 14:12:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8290 states. [2020-10-13 14:12:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 11769 transitions. [2020-10-13 14:12:01,847 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 11769 transitions. Word has length 80 [2020-10-13 14:12:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:01,847 INFO L479 AbstractCegarLoop]: Abstraction has 8290 states and 11769 transitions. [2020-10-13 14:12:01,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:12:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 11769 transitions. [2020-10-13 14:12:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:12:01,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:01,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:01,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:12:01,851 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash 466582131, now seen corresponding path program 1 times [2020-10-13 14:12:01,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:01,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474587425] [2020-10-13 14:12:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:01,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:01,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:02,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:02,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:06,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:12:06,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:12:06,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:12:06,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:07,042 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:12:07,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:07,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:07,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:07,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:07,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:12:07,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:07,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:12:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:12:07,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:12:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:12:07,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474587425] [2020-10-13 14:12:07,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:12:07,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:12:07,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739494015] [2020-10-13 14:12:07,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:12:07,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:12:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:12:07,114 INFO L87 Difference]: Start difference. First operand 8290 states and 11769 transitions. Second operand 6 states. [2020-10-13 14:12:07,304 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:12:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:08,719 INFO L93 Difference]: Finished difference Result 16569 states and 23532 transitions. [2020-10-13 14:12:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:12:08,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-13 14:12:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:08,729 INFO L225 Difference]: With dead ends: 16569 [2020-10-13 14:12:08,729 INFO L226 Difference]: Without dead ends: 8311 [2020-10-13 14:12:08,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:12:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2020-10-13 14:12:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8290. [2020-10-13 14:12:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8290 states. [2020-10-13 14:12:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 11769 transitions. [2020-10-13 14:12:09,530 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 11769 transitions. Word has length 80 [2020-10-13 14:12:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:09,530 INFO L479 AbstractCegarLoop]: Abstraction has 8290 states and 11769 transitions. [2020-10-13 14:12:09,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:12:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 11769 transitions. [2020-10-13 14:12:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:12:09,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:09,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:09,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:12:09,534 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash -96970718, now seen corresponding path program 1 times [2020-10-13 14:12:09,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:09,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715451498] [2020-10-13 14:12:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:09,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:09,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:10,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:14,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:14,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:12:14,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:12:14,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:12:14,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:12:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:12:14,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:12:14,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:14,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:14,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:14,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:14,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:14,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:14,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:15,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715451498] [2020-10-13 14:12:15,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:15,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:12:15,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942908672] [2020-10-13 14:12:15,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:12:15,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:12:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:12:15,015 INFO L87 Difference]: Start difference. First operand 8290 states and 11769 transitions. Second operand 12 states. [2020-10-13 14:12:15,201 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:12:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:25,707 INFO L93 Difference]: Finished difference Result 69546 states and 96427 transitions. [2020-10-13 14:12:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 14:12:25,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-13 14:12:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:25,782 INFO L225 Difference]: With dead ends: 69546 [2020-10-13 14:12:25,783 INFO L226 Difference]: Without dead ends: 61288 [2020-10-13 14:12:25,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1015, Invalid=5147, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 14:12:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61288 states. [2020-10-13 14:12:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61288 to 24642. [2020-10-13 14:12:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24642 states. [2020-10-13 14:12:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24642 states to 24642 states and 34545 transitions. [2020-10-13 14:12:28,463 INFO L78 Accepts]: Start accepts. Automaton has 24642 states and 34545 transitions. Word has length 80 [2020-10-13 14:12:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:28,463 INFO L479 AbstractCegarLoop]: Abstraction has 24642 states and 34545 transitions. [2020-10-13 14:12:28,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:12:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24642 states and 34545 transitions. [2020-10-13 14:12:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:12:28,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:28,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:28,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:12:28,468 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2107054290, now seen corresponding path program 1 times [2020-10-13 14:12:28,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:28,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553189918] [2020-10-13 14:12:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:28,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:28,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:30,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:33,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:12:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:33,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:33,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:12:33,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:12:33,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553189918] [2020-10-13 14:12:33,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:12:33,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:12:33,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236724113] [2020-10-13 14:12:33,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:12:33,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:12:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:12:33,804 INFO L87 Difference]: Start difference. First operand 24642 states and 34545 transitions. Second operand 9 states. [2020-10-13 14:12:33,961 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:12:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:40,282 INFO L93 Difference]: Finished difference Result 69006 states and 96108 transitions. [2020-10-13 14:12:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:12:40,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-13 14:12:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:40,335 INFO L225 Difference]: With dead ends: 69006 [2020-10-13 14:12:40,335 INFO L226 Difference]: Without dead ends: 48800 [2020-10-13 14:12:40,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:12:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48800 states. [2020-10-13 14:12:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48800 to 36686. [2020-10-13 14:12:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36686 states. [2020-10-13 14:12:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36686 states to 36686 states and 51261 transitions. [2020-10-13 14:12:44,326 INFO L78 Accepts]: Start accepts. Automaton has 36686 states and 51261 transitions. Word has length 80 [2020-10-13 14:12:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:44,326 INFO L479 AbstractCegarLoop]: Abstraction has 36686 states and 51261 transitions. [2020-10-13 14:12:44,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:12:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 36686 states and 51261 transitions. [2020-10-13 14:12:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:12:44,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:44,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:44,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:12:44,330 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash 919220797, now seen corresponding path program 1 times [2020-10-13 14:12:44,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:44,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517799967] [2020-10-13 14:12:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:44,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:44,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:44,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:44,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:44,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:45,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:45,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5552 [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:12:49,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:12:49,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:12:49,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:50,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:12:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:50,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:50,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:12:50,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:12:50,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:12:50,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:12:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:12:50,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517799967] [2020-10-13 14:12:50,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:12:50,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:12:50,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985554681] [2020-10-13 14:12:50,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:12:50,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:12:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:12:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:12:50,052 INFO L87 Difference]: Start difference. First operand 36686 states and 51261 transitions. Second operand 6 states. [2020-10-13 14:12:50,188 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:12:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:12:54,285 INFO L93 Difference]: Finished difference Result 71029 states and 99399 transitions. [2020-10-13 14:12:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:12:54,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-13 14:12:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:12:54,322 INFO L225 Difference]: With dead ends: 71029 [2020-10-13 14:12:54,322 INFO L226 Difference]: Without dead ends: 34375 [2020-10-13 14:12:54,347 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 [2020-10-13 14:12:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34375 states. [2020-10-13 14:12:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34375 to 34372. [2020-10-13 14:12:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34372 states. [2020-10-13 14:12:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34372 states to 34372 states and 47975 transitions. [2020-10-13 14:12:58,284 INFO L78 Accepts]: Start accepts. Automaton has 34372 states and 47975 transitions. Word has length 80 [2020-10-13 14:12:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:12:58,284 INFO L479 AbstractCegarLoop]: Abstraction has 34372 states and 47975 transitions. [2020-10-13 14:12:58,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:12:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34372 states and 47975 transitions. [2020-10-13 14:12:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:12:58,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:12:58,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:12:58,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:12:58,289 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:12:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:12:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1881575313, now seen corresponding path program 1 times [2020-10-13 14:12:58,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:12:58,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444532538] [2020-10-13 14:12:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:12:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:12:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:12:58,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:00,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:01,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:02,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:03,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:13:03,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:13:03,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:13:03,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:13:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:13:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:13:03,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:03,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:03,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:03,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:03,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:03,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:03,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:03,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:03,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444532538] [2020-10-13 14:13:03,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:13:03,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:13:03,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46262931] [2020-10-13 14:13:03,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:13:03,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:03,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:13:03,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:03,455 INFO L87 Difference]: Start difference. First operand 34372 states and 47975 transitions. Second operand 4 states. [2020-10-13 14:13:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:07,801 INFO L93 Difference]: Finished difference Result 64883 states and 90713 transitions. [2020-10-13 14:13:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:13:07,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:13:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:07,834 INFO L225 Difference]: With dead ends: 64883 [2020-10-13 14:13:07,834 INFO L226 Difference]: Without dead ends: 30543 [2020-10-13 14:13:07,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:13:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2020-10-13 14:13:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 29621. [2020-10-13 14:13:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29621 states. [2020-10-13 14:13:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29621 states to 29621 states and 41087 transitions. [2020-10-13 14:13:11,395 INFO L78 Accepts]: Start accepts. Automaton has 29621 states and 41087 transitions. Word has length 81 [2020-10-13 14:13:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:11,395 INFO L479 AbstractCegarLoop]: Abstraction has 29621 states and 41087 transitions. [2020-10-13 14:13:11,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:13:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29621 states and 41087 transitions. [2020-10-13 14:13:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:13:11,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:11,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:11,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:13:11,398 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1371062552, now seen corresponding path program 1 times [2020-10-13 14:13:11,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:11,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588285780] [2020-10-13 14:13:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:11,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:13:16,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:13:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:13:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:13:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:13:16,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:13:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:16,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:16,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:16,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:16,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:16,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:13:16,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:16,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:16,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:16,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588285780] [2020-10-13 14:13:16,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:16,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:13:16,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890934366] [2020-10-13 14:13:16,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:13:16,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:13:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:13:16,729 INFO L87 Difference]: Start difference. First operand 29621 states and 41087 transitions. Second operand 10 states. [2020-10-13 14:13:16,862 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:13:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:21,483 INFO L93 Difference]: Finished difference Result 56587 states and 78345 transitions. [2020-10-13 14:13:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:13:21,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-13 14:13:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:21,511 INFO L225 Difference]: With dead ends: 56587 [2020-10-13 14:13:21,511 INFO L226 Difference]: Without dead ends: 27047 [2020-10-13 14:13:21,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:13:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27047 states. [2020-10-13 14:13:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27047 to 17580. [2020-10-13 14:13:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17580 states. [2020-10-13 14:13:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17580 states to 17580 states and 24583 transitions. [2020-10-13 14:13:23,733 INFO L78 Accepts]: Start accepts. Automaton has 17580 states and 24583 transitions. Word has length 81 [2020-10-13 14:13:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:23,734 INFO L479 AbstractCegarLoop]: Abstraction has 17580 states and 24583 transitions. [2020-10-13 14:13:23,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:13:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17580 states and 24583 transitions. [2020-10-13 14:13:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:13:23,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:23,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:23,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:13:23,737 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1817156049, now seen corresponding path program 1 times [2020-10-13 14:13:23,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:23,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754008113] [2020-10-13 14:13:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:23,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:24,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:26,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:28,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:28,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:13:28,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:13:28,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:13:28,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:29,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:29,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:29,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:29,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:13:29,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:29,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754008113] [2020-10-13 14:13:29,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:29,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:13:29,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918396734] [2020-10-13 14:13:29,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:13:29,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:29,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:13:29,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:13:29,092 INFO L87 Difference]: Start difference. First operand 17580 states and 24583 transitions. Second operand 13 states. [2020-10-13 14:13:29,270 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:13:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:34,308 INFO L93 Difference]: Finished difference Result 45072 states and 62338 transitions. [2020-10-13 14:13:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 14:13:34,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2020-10-13 14:13:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:34,338 INFO L225 Difference]: With dead ends: 45072 [2020-10-13 14:13:34,338 INFO L226 Difference]: Without dead ends: 27550 [2020-10-13 14:13:34,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-13 14:13:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27550 states. [2020-10-13 14:13:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27550 to 17613. [2020-10-13 14:13:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17613 states. [2020-10-13 14:13:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17613 states to 17613 states and 24621 transitions. [2020-10-13 14:13:36,661 INFO L78 Accepts]: Start accepts. Automaton has 17613 states and 24621 transitions. Word has length 81 [2020-10-13 14:13:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:36,661 INFO L479 AbstractCegarLoop]: Abstraction has 17613 states and 24621 transitions. [2020-10-13 14:13:36,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:13:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 17613 states and 24621 transitions. [2020-10-13 14:13:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:13:36,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:36,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:36,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:13:36,664 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1444630155, now seen corresponding path program 1 times [2020-10-13 14:13:36,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:36,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913246653] [2020-10-13 14:13:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:36,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:37,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:38,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:39,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:40,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:41,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:41,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:13:41,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:13:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:41,966 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 27 [2020-10-13 14:13:42,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:13:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:42,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:13:42,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:13:42,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:13:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:13:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:13:42,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913246653] [2020-10-13 14:13:42,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:13:42,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:13:42,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042322322] [2020-10-13 14:13:42,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:13:42,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:13:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:13:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:13:42,170 INFO L87 Difference]: Start difference. First operand 17613 states and 24621 transitions. Second operand 12 states. [2020-10-13 14:13:42,629 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2020-10-13 14:13:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:13:53,077 INFO L93 Difference]: Finished difference Result 68326 states and 94067 transitions. [2020-10-13 14:13:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 14:13:53,078 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-13 14:13:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:13:53,140 INFO L225 Difference]: With dead ends: 68326 [2020-10-13 14:13:53,141 INFO L226 Difference]: Without dead ends: 50804 [2020-10-13 14:13:53,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 14:13:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50804 states. [2020-10-13 14:13:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50804 to 27832. [2020-10-13 14:13:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27832 states. [2020-10-13 14:13:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27832 states to 27832 states and 38867 transitions. [2020-10-13 14:13:57,338 INFO L78 Accepts]: Start accepts. Automaton has 27832 states and 38867 transitions. Word has length 81 [2020-10-13 14:13:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:13:57,338 INFO L479 AbstractCegarLoop]: Abstraction has 27832 states and 38867 transitions. [2020-10-13 14:13:57,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:13:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 27832 states and 38867 transitions. [2020-10-13 14:13:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:13:57,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:13:57,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:13:57,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:13:57,341 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:13:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:13:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1981810642, now seen corresponding path program 1 times [2020-10-13 14:13:57,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:13:57,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565573454] [2020-10-13 14:13:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:13:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:13:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:57,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:58,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:13:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:02,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:14:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:14:02,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:02,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:02,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:02,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:14:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565573454] [2020-10-13 14:14:02,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:02,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:02,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20812879] [2020-10-13 14:14:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:02,486 INFO L87 Difference]: Start difference. First operand 27832 states and 38867 transitions. Second operand 4 states. [2020-10-13 14:14:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:06,300 INFO L93 Difference]: Finished difference Result 53958 states and 75504 transitions. [2020-10-13 14:14:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:14:06,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-13 14:14:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:06,328 INFO L225 Difference]: With dead ends: 53958 [2020-10-13 14:14:06,328 INFO L226 Difference]: Without dead ends: 26215 [2020-10-13 14:14:06,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26215 states. [2020-10-13 14:14:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26215 to 26215. [2020-10-13 14:14:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26215 states. [2020-10-13 14:14:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 36461 transitions. [2020-10-13 14:14:09,892 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 36461 transitions. Word has length 82 [2020-10-13 14:14:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:09,892 INFO L479 AbstractCegarLoop]: Abstraction has 26215 states and 36461 transitions. [2020-10-13 14:14:09,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 36461 transitions. [2020-10-13 14:14:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:14:09,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:09,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:09,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:14:09,894 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:09,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1403156433, now seen corresponding path program 1 times [2020-10-13 14:14:09,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:09,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256667686] [2020-10-13 14:14:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:09,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:09,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:14,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:14,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:14,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:14:14,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:14:14,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:14:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:14:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:14:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:15,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:15,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:15,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:15,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256667686] [2020-10-13 14:14:15,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:15,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:14:15,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562612706] [2020-10-13 14:14:15,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:14:15,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:14:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:14:15,183 INFO L87 Difference]: Start difference. First operand 26215 states and 36461 transitions. Second operand 9 states. [2020-10-13 14:14:15,329 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:14:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:22,016 INFO L93 Difference]: Finished difference Result 66293 states and 91366 transitions. [2020-10-13 14:14:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 14:14:22,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:14:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:22,061 INFO L225 Difference]: With dead ends: 66293 [2020-10-13 14:14:22,062 INFO L226 Difference]: Without dead ends: 40167 [2020-10-13 14:14:22,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-13 14:14:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40167 states. [2020-10-13 14:14:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40167 to 26220. [2020-10-13 14:14:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26220 states. [2020-10-13 14:14:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26220 states to 26220 states and 36467 transitions. [2020-10-13 14:14:25,888 INFO L78 Accepts]: Start accepts. Automaton has 26220 states and 36467 transitions. Word has length 82 [2020-10-13 14:14:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:25,888 INFO L479 AbstractCegarLoop]: Abstraction has 26220 states and 36467 transitions. [2020-10-13 14:14:25,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:14:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 26220 states and 36467 transitions. [2020-10-13 14:14:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:14:25,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:25,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:25,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:14:25,891 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash -898137521, now seen corresponding path program 1 times [2020-10-13 14:14:25,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:25,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462026608] [2020-10-13 14:14:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:25,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:29,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:14:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:14:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:31,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:31,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:31,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:31,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:31,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462026608] [2020-10-13 14:14:31,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:31,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:14:31,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872286316] [2020-10-13 14:14:31,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:14:31,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:14:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:14:31,276 INFO L87 Difference]: Start difference. First operand 26220 states and 36467 transitions. Second operand 12 states. [2020-10-13 14:14:31,770 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2020-10-13 14:14:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:52,066 INFO L93 Difference]: Finished difference Result 132782 states and 181353 transitions. [2020-10-13 14:14:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 14:14:52,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-13 14:14:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:52,189 INFO L225 Difference]: With dead ends: 132782 [2020-10-13 14:14:52,189 INFO L226 Difference]: Without dead ends: 106656 [2020-10-13 14:14:52,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=481, Invalid=2381, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 14:14:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106656 states. [2020-10-13 14:15:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106656 to 57274. [2020-10-13 14:15:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57274 states. [2020-10-13 14:15:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57274 states to 57274 states and 79849 transitions. [2020-10-13 14:15:02,777 INFO L78 Accepts]: Start accepts. Automaton has 57274 states and 79849 transitions. Word has length 82 [2020-10-13 14:15:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:02,778 INFO L479 AbstractCegarLoop]: Abstraction has 57274 states and 79849 transitions. [2020-10-13 14:15:02,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:15:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 57274 states and 79849 transitions. [2020-10-13 14:15:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:15:02,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:02,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:02,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:15:02,781 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash -874392299, now seen corresponding path program 1 times [2020-10-13 14:15:02,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:02,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168816429] [2020-10-13 14:15:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:03,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:07,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:07,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:15:07,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:15:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:08,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:08,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:08,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168816429] [2020-10-13 14:15:08,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:08,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:15:08,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309200826] [2020-10-13 14:15:08,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:15:08,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:15:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:15:08,212 INFO L87 Difference]: Start difference. First operand 57274 states and 79849 transitions. Second operand 13 states. [2020-10-13 14:15:08,559 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 126