/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_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:11:22,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:11:22,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:11:22,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:11:22,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:11:22,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:11:22,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:11:22,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:11:22,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:11:22,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:11:22,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:11:22,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:11:22,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:11:22,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:11:22,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:11:22,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:11:22,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:11:22,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:11:22,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:11:22,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:11:22,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:11:22,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:11:22,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:11:22,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:11:22,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:11:22,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:11:22,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:11:22,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:11:22,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:11:22,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:11:22,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:11:22,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:11:22,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:11:22,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:11:22,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:11:22,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:11:22,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:11:22,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:11:22,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:11:22,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:11:22,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:11:22,381 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 15:11:22,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:11:22,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:11:22,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:11:22,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:11:22,405 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:11:22,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:11:22,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:11:22,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:11:22,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:11:22,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:11:22,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:11:22,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:11:22,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:11:22,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:11:22,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:11:22,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:11:22,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:11:22,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:11:22,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:11:22,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:11:22,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:11:22,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:11:22,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:11:22,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:11:22,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:11:22,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:11:22,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:11:22,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:11:22,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:11:22,409 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 15:11:22,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:11:22,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:11:22,749 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:11:22,751 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:11:22,753 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:11:22,754 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:11:22,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcbb014f/d33ff6e766044f2ab4b8f848b6d64f96/FLAGa9360878f [2020-10-13 15:11:23,508 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:11:23,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:11:23,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcbb014f/d33ff6e766044f2ab4b8f848b6d64f96/FLAGa9360878f [2020-10-13 15:11:23,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbcbb014f/d33ff6e766044f2ab4b8f848b6d64f96 [2020-10-13 15:11:23,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:11:23,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:11:23,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:11:23,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:11:23,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:11:23,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:11:23" (1/1) ... [2020-10-13 15:11:23,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d48d131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:23, skipping insertion in model container [2020-10-13 15:11:23,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:11:23" (1/1) ... [2020-10-13 15:11:23,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:11:23,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:11:25,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:11:25,163 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:11:26,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:11:26,233 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:11:26,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26 WrapperNode [2020-10-13 15:11:26,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:11:26,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:11:26,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:11:26,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:11:26,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (1/1) ... [2020-10-13 15:11:26,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:11:26,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:11:26,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:11:26,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:11:26,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (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 15:11:26,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:11:26,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:11:26,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:11:26,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:11:26,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:11:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:11:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:11:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:11:26,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:11:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:11:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:11:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:11:26,573 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:11:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:11:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:11:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:11:26,574 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 15:11:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:11:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:11:26,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:11:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:11:26,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:11:30,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:11:30,924 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:11:30,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:11:30 BoogieIcfgContainer [2020-10-13 15:11:30,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:11:30,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:11:30,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:11:30,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:11:30,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:11:23" (1/3) ... [2020-10-13 15:11:30,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0842d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:11:30, skipping insertion in model container [2020-10-13 15:11:30,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:11:26" (2/3) ... [2020-10-13 15:11:30,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0842d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:11:30, skipping insertion in model container [2020-10-13 15:11:30,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:11:30" (3/3) ... [2020-10-13 15:11:30,950 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:11:30,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:11:30,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:11:30,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:11:31,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:11:31,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:11:31,043 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:11:31,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:11:31,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:11:31,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:11:31,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:11:31,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:11:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states. [2020-10-13 15:11:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:11:31,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:31,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:31,127 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash 517770824, now seen corresponding path program 1 times [2020-10-13 15:11:31,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:31,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798729321] [2020-10-13 15:11:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:32,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:33,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:33,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:34,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:34,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:36,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:36,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:36,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:11:36,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:11:36,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-13 15:11:36,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:11:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-13 15:11:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:11:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:11:38,164 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:11:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:38,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:38,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:38,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:38,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:38,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 15:11:38,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:38,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:38,492 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 15:11:38,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798729321] [2020-10-13 15:11:38,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:38,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:11:38,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743824887] [2020-10-13 15:11:38,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:11:38,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:38,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:11:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:38,524 INFO L87 Difference]: Start difference. First operand 1549 states. Second operand 4 states. [2020-10-13 15:11:39,668 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:11:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:54,849 INFO L93 Difference]: Finished difference Result 3151 states and 5497 transitions. [2020-10-13 15:11:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:11:54,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:11:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:54,890 INFO L225 Difference]: With dead ends: 3151 [2020-10-13 15:11:54,891 INFO L226 Difference]: Without dead ends: 2174 [2020-10-13 15:11:54,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:11:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2020-10-13 15:11:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2172. [2020-10-13 15:11:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2172 states. [2020-10-13 15:11:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3628 transitions. [2020-10-13 15:11:55,096 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3628 transitions. Word has length 396 [2020-10-13 15:11:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:55,098 INFO L479 AbstractCegarLoop]: Abstraction has 2172 states and 3628 transitions. [2020-10-13 15:11:55,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:11:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3628 transitions. [2020-10-13 15:11:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:11:55,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:55,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:55,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:11:55,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash 251891029, now seen corresponding path program 1 times [2020-10-13 15:11:55,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:55,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344475891] [2020-10-13 15:11:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:57,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:58,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:58,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:59,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:00,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:00,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:12:00,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:12:00,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 15:12:00,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:12:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-13 15:12:00,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 15:12:00,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:12:01,756 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:12:01,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:01,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:01,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:01,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:01,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 15:12:01,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:12:02,125 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 15:12:02,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344475891] [2020-10-13 15:12:02,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:02,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:12:02,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829198740] [2020-10-13 15:12:02,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:12:02,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:02,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:12:02,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:02,133 INFO L87 Difference]: Start difference. First operand 2172 states and 3628 transitions. Second operand 4 states. [2020-10-13 15:12:02,934 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:12:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:16,568 INFO L93 Difference]: Finished difference Result 4814 states and 7956 transitions. [2020-10-13 15:12:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:16,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:12:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:16,589 INFO L225 Difference]: With dead ends: 4814 [2020-10-13 15:12:16,589 INFO L226 Difference]: Without dead ends: 3250 [2020-10-13 15:12:16,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-10-13 15:12:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3248. [2020-10-13 15:12:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2020-10-13 15:12:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5381 transitions. [2020-10-13 15:12:16,722 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5381 transitions. Word has length 396 [2020-10-13 15:12:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:16,724 INFO L479 AbstractCegarLoop]: Abstraction has 3248 states and 5381 transitions. [2020-10-13 15:12:16,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5381 transitions. [2020-10-13 15:12:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:12:16,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:16,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:16,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:12:16,738 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash 153682145, now seen corresponding path program 1 times [2020-10-13 15:12:16,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:16,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400180690] [2020-10-13 15:12:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:20,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:20,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:20,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:22,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:22,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:12:22,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:12:22,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-13 15:12:22,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:12:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-13 15:12:22,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:12:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:22,900 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:12:22,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:22,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:22,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:22,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:22,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 15:12:22,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:22,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:12:23,134 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 15:12:23,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400180690] [2020-10-13 15:12:23,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:23,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:12:23,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694833341] [2020-10-13 15:12:23,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:12:23,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:23,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:12:23,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:23,138 INFO L87 Difference]: Start difference. First operand 3248 states and 5381 transitions. Second operand 4 states. [2020-10-13 15:12:23,981 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:12:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:36,585 INFO L93 Difference]: Finished difference Result 7458 states and 12245 transitions. [2020-10-13 15:12:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:36,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:12:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:36,610 INFO L225 Difference]: With dead ends: 7458 [2020-10-13 15:12:36,611 INFO L226 Difference]: Without dead ends: 4884 [2020-10-13 15:12:36,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2020-10-13 15:12:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4882. [2020-10-13 15:12:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4882 states. [2020-10-13 15:12:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 8018 transitions. [2020-10-13 15:12:36,798 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 8018 transitions. Word has length 396 [2020-10-13 15:12:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:36,799 INFO L479 AbstractCegarLoop]: Abstraction has 4882 states and 8018 transitions. [2020-10-13 15:12:36,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 8018 transitions. [2020-10-13 15:12:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:12:36,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:36,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:36,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:12:36,819 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1155467413, now seen corresponding path program 1 times [2020-10-13 15:12:36,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:36,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904819446] [2020-10-13 15:12:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:37,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:38,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:40,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:42,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:42,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:12:42,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:12:42,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 15:12:42,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:12:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-13 15:12:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 15:12:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:42,880 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:12:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:42,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:42,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:42,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:42,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:42,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 15:12:42,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:42,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:42,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:42,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:43,046 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 15:12:43,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904819446] [2020-10-13 15:12:43,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:43,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:12:43,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254805471] [2020-10-13 15:12:43,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:12:43,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:12:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:43,049 INFO L87 Difference]: Start difference. First operand 4882 states and 8018 transitions. Second operand 4 states. [2020-10-13 15:12:43,852 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-10-13 15:12:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:55,119 INFO L93 Difference]: Finished difference Result 11894 states and 19383 transitions. [2020-10-13 15:12:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:55,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:12:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:55,155 INFO L225 Difference]: With dead ends: 11894 [2020-10-13 15:12:55,155 INFO L226 Difference]: Without dead ends: 7714 [2020-10-13 15:12:55,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2020-10-13 15:12:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7712. [2020-10-13 15:12:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7712 states. [2020-10-13 15:12:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 12559 transitions. [2020-10-13 15:12:55,417 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 12559 transitions. Word has length 396 [2020-10-13 15:12:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:55,418 INFO L479 AbstractCegarLoop]: Abstraction has 7712 states and 12559 transitions. [2020-10-13 15:12:55,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 12559 transitions. [2020-10-13 15:12:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:12:55,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:55,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:55,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:12:55,437 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1093074036, now seen corresponding path program 1 times [2020-10-13 15:12:55,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:55,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982157361] [2020-10-13 15:12:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:56,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:56,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:56,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:00,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:13:00,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:13:00,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:01,709 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:01,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:01,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:01,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:01,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:13:01,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:01,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:01,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:01,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:01,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:01,863 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 15:13:01,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982157361] [2020-10-13 15:13:01,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:01,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:01,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682595654] [2020-10-13 15:13:01,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:01,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:01,866 INFO L87 Difference]: Start difference. First operand 7712 states and 12559 transitions. Second operand 4 states. [2020-10-13 15:13:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:13,474 INFO L93 Difference]: Finished difference Result 20260 states and 32856 transitions. [2020-10-13 15:13:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:13:13,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:13:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:13,523 INFO L225 Difference]: With dead ends: 20260 [2020-10-13 15:13:13,523 INFO L226 Difference]: Without dead ends: 13426 [2020-10-13 15:13:13,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13426 states. [2020-10-13 15:13:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13426 to 12840. [2020-10-13 15:13:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12840 states. [2020-10-13 15:13:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 20678 transitions. [2020-10-13 15:13:14,040 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 20678 transitions. Word has length 396 [2020-10-13 15:13:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:14,041 INFO L479 AbstractCegarLoop]: Abstraction has 12840 states and 20678 transitions. [2020-10-13 15:13:14,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 20678 transitions. [2020-10-13 15:13:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:13:14,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:14,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:14,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:13:14,071 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash 530268326, now seen corresponding path program 1 times [2020-10-13 15:13:14,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:14,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645681358] [2020-10-13 15:13:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:14,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:14,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:16,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:19,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:19,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:13:19,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:13:19,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 15:13:19,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-13 15:13:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:13:19,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:20,097 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:20,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:20,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:20,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:20,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:13:20,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:20,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:20,262 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 15:13:20,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645681358] [2020-10-13 15:13:20,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:20,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113237882] [2020-10-13 15:13:20,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:20,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:20,265 INFO L87 Difference]: Start difference. First operand 12840 states and 20678 transitions. Second operand 4 states. [2020-10-13 15:13:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:30,033 INFO L93 Difference]: Finished difference Result 19948 states and 32384 transitions. [2020-10-13 15:13:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:13:30,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:13:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:30,053 INFO L225 Difference]: With dead ends: 19948 [2020-10-13 15:13:30,053 INFO L226 Difference]: Without dead ends: 8786 [2020-10-13 15:13:30,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2020-10-13 15:13:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 8784. [2020-10-13 15:13:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8784 states. [2020-10-13 15:13:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 14308 transitions. [2020-10-13 15:13:30,386 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 14308 transitions. Word has length 396 [2020-10-13 15:13:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:30,386 INFO L479 AbstractCegarLoop]: Abstraction has 8784 states and 14308 transitions. [2020-10-13 15:13:30,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 14308 transitions. [2020-10-13 15:13:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:13:30,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:30,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:30,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:13:30,403 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1403354198, now seen corresponding path program 1 times [2020-10-13 15:13:30,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:30,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122323662] [2020-10-13 15:13:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:30,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:32,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:32,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:32,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:32,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:35,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:35,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:13:35,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:13:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:13:35,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-13 15:13:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:13:35,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:36,390 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:36,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:36,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:36,547 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 15:13:36,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122323662] [2020-10-13 15:13:36,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:36,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:36,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385211838] [2020-10-13 15:13:36,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:36,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:36,550 INFO L87 Difference]: Start difference. First operand 8784 states and 14308 transitions. Second operand 4 states. [2020-10-13 15:13:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:46,098 INFO L93 Difference]: Finished difference Result 11804 states and 19290 transitions. [2020-10-13 15:13:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:13:46,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:13:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:46,110 INFO L225 Difference]: With dead ends: 11804 [2020-10-13 15:13:46,110 INFO L226 Difference]: Without dead ends: 4858 [2020-10-13 15:13:46,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2020-10-13 15:13:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4856. [2020-10-13 15:13:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-10-13 15:13:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7920 transitions. [2020-10-13 15:13:46,334 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7920 transitions. Word has length 396 [2020-10-13 15:13:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:46,335 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 7920 transitions. [2020-10-13 15:13:46,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:13:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7920 transitions. [2020-10-13 15:13:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:13:46,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:46,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:46,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:13:46,352 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1712039743, now seen corresponding path program 1 times [2020-10-13 15:13:46,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:46,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693510563] [2020-10-13 15:13:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:47,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:47,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:48,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:51,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 275 [2020-10-13 15:13:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:13:51,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:52,536 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:13:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:52,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:52,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:52,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 15:13:52,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:52,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:52,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:52,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:52,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:52,714 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 15:13:52,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693510563] [2020-10-13 15:13:52,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:52,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:52,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616340492] [2020-10-13 15:13:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:52,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:52,717 INFO L87 Difference]: Start difference. First operand 4856 states and 7920 transitions. Second operand 4 states. [2020-10-13 15:13:53,556 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-10-13 15:14:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:04,316 INFO L93 Difference]: Finished difference Result 8412 states and 13718 transitions. [2020-10-13 15:14:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:14:04,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:14:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:04,327 INFO L225 Difference]: With dead ends: 8412 [2020-10-13 15:14:04,327 INFO L226 Difference]: Without dead ends: 4858 [2020-10-13 15:14:04,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:14:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2020-10-13 15:14:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4856. [2020-10-13 15:14:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-10-13 15:14:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7902 transitions. [2020-10-13 15:14:04,536 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7902 transitions. Word has length 396 [2020-10-13 15:14:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:04,537 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 7902 transitions. [2020-10-13 15:14:04,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7902 transitions. [2020-10-13 15:14:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:14:04,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:04,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:14:04,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:14:04,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -60413590, now seen corresponding path program 1 times [2020-10-13 15:14:04,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:04,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822611672] [2020-10-13 15:14:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:05,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:09,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-13 15:14:09,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 15:14:09,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:10,600 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:10,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:10,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:10,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:10,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:10,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:10,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:14:10,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:10,724 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 15:14:10,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822611672] [2020-10-13 15:14:10,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:10,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:10,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637086403] [2020-10-13 15:14:10,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:10,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:10,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:10,727 INFO L87 Difference]: Start difference. First operand 4856 states and 7902 transitions. Second operand 4 states. [2020-10-13 15:14:11,522 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-10-13 15:14:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:22,651 INFO L93 Difference]: Finished difference Result 7680 states and 12632 transitions. [2020-10-13 15:14:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:14:22,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:14:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:22,713 INFO L225 Difference]: With dead ends: 7680 [2020-10-13 15:14:22,713 INFO L226 Difference]: Without dead ends: 5710 [2020-10-13 15:14:22,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:14:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2020-10-13 15:14:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 5704. [2020-10-13 15:14:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5704 states. [2020-10-13 15:14:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 9314 transitions. [2020-10-13 15:14:22,929 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 9314 transitions. Word has length 396 [2020-10-13 15:14:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:22,930 INFO L479 AbstractCegarLoop]: Abstraction has 5704 states and 9314 transitions. [2020-10-13 15:14:22,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 9314 transitions. [2020-10-13 15:14:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-13 15:14:22,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:22,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:14:22,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:14:22,940 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1294684839, now seen corresponding path program 1 times [2020-10-13 15:14:22,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:22,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564570341] [2020-10-13 15:14:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:23,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:23,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:23,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:28,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:28,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 402 [2020-10-13 15:14:28,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:14:28,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:29,021 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:29,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:29,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:29,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:29,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:29,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:29,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 15:14:29,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:29,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:29,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:29,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:29,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:29,187 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 15:14:29,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564570341] [2020-10-13 15:14:29,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:29,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:29,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360716367] [2020-10-13 15:14:29,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:29,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:29,190 INFO L87 Difference]: Start difference. First operand 5704 states and 9314 transitions. Second operand 4 states. [2020-10-13 15:14:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:38,808 INFO L93 Difference]: Finished difference Result 7500 states and 12280 transitions. [2020-10-13 15:14:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:14:38,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 396 [2020-10-13 15:14:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:38,814 INFO L225 Difference]: With dead ends: 7500 [2020-10-13 15:14:38,814 INFO L226 Difference]: Without dead ends: 3306 [2020-10-13 15:14:38,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-10-13 15:14:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2940. [2020-10-13 15:14:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2940 states. [2020-10-13 15:14:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 4798 transitions. [2020-10-13 15:14:38,951 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 4798 transitions. Word has length 396 [2020-10-13 15:14:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:38,952 INFO L479 AbstractCegarLoop]: Abstraction has 2940 states and 4798 transitions. [2020-10-13 15:14:38,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 4798 transitions. [2020-10-13 15:14:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-13 15:14:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:38,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:14:38,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:14:38,959 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash -485229077, now seen corresponding path program 1 times [2020-10-13 15:14:38,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:38,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875682351] [2020-10-13 15:14:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:40,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:40,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:40,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:40,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:44,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:44,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 407 [2020-10-13 15:14:44,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:14:44,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 15:14:44,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:14:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-13 15:14:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-13 15:14:44,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:45,006 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:14:45,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:14:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:45,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:14:45,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:14:45,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:14:45,201 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 15:14:45,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875682351] [2020-10-13 15:14:45,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:14:45,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:14:45,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309117681] [2020-10-13 15:14:45,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:14:45,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:14:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:14:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:14:45,204 INFO L87 Difference]: Start difference. First operand 2940 states and 4798 transitions. Second operand 4 states. [2020-10-13 15:14:45,991 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-10-13 15:14:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:14:55,136 INFO L93 Difference]: Finished difference Result 5040 states and 8266 transitions. [2020-10-13 15:14:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:14:55,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 401 [2020-10-13 15:14:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:14:55,141 INFO L225 Difference]: With dead ends: 5040 [2020-10-13 15:14:55,141 INFO L226 Difference]: Without dead ends: 4054 [2020-10-13 15:14:55,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:14:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2020-10-13 15:14:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4052. [2020-10-13 15:14:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4052 states. [2020-10-13 15:14:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 6608 transitions. [2020-10-13 15:14:55,290 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 6608 transitions. Word has length 401 [2020-10-13 15:14:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:14:55,291 INFO L479 AbstractCegarLoop]: Abstraction has 4052 states and 6608 transitions. [2020-10-13 15:14:55,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:14:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 6608 transitions. [2020-10-13 15:14:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-13 15:14:55,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:14:55,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:14:55,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:14:55,295 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:14:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:14:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1455731194, now seen corresponding path program 1 times [2020-10-13 15:14:55,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:14:55,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295913987] [2020-10-13 15:14:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:14:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:14:55,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:55,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:56,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:57,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:57,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:14:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:15:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-13 15:15:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-13 15:15:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:01,283 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2020-10-13 15:15:01,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:15:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:15:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:15:01,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:15:01,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:15:01,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:15:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 15:15:01,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:15:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:15:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:15:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:15:01,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:15:01,458 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 15:15:01,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295913987] [2020-10-13 15:15:01,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:15:01,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:15:01,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732654129] [2020-10-13 15:15:01,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:15:01,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:15:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:15:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:15:01,460 INFO L87 Difference]: Start difference. First operand 4052 states and 6608 transitions. Second operand 4 states. [2020-10-13 15:15:02,240 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 397