/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_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:06:06,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:06:06,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:06:06,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:06:06,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:06:06,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:06:06,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:06:06,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:06:06,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:06:06,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:06:06,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:06:06,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:06:06,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:06:06,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:06:06,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:06:06,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:06:06,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:06:06,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:06:06,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:06:06,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:06:06,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:06:06,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:06:06,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:06:06,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:06:06,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:06:06,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:06:06,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:06:06,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:06:06,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:06:06,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:06:06,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:06:06,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:06:06,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:06:06,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:06:06,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:06:06,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:06:06,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:06:06,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:06:06,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:06:06,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:06:06,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:06:06,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:06:06,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:06:06,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:06:06,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:06:06,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:06:06,503 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:06:06,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:06:06,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:06:06,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:06:06,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:06:06,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:06:06,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:06:06,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:06:06,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:06:06,506 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:06:06,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:06:06,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:06:06,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:06:06,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:06:06,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:06:06,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:06:06,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:06:06,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:06:06,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:06:06,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:06:06,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:06:06,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:06:06,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:06:06,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:06:06,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:06:06,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:06:06,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:06:06,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:06:06,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:06:06,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:06:06,828 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:06:06,829 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:06:06,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28be0f642/93ecdfd7c39f45339ac53fad0bb3847f/FLAG9940192b2 [2020-10-13 14:06:07,531 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:06:07,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:06:07,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28be0f642/93ecdfd7c39f45339ac53fad0bb3847f/FLAG9940192b2 [2020-10-13 14:06:07,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28be0f642/93ecdfd7c39f45339ac53fad0bb3847f [2020-10-13 14:06:07,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:06:07,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:06:07,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:06:07,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:06:07,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:06:07,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:06:07" (1/1) ... [2020-10-13 14:06:07,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c20ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:07, skipping insertion in model container [2020-10-13 14:06:07,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:06:07" (1/1) ... [2020-10-13 14:06:07,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:06:07,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:06:09,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:06:09,249 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:06:10,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:06:10,298 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:06:10,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10 WrapperNode [2020-10-13 14:06:10,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:06:10,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:06:10,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:06:10,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:06:10,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... [2020-10-13 14:06:10,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:06:10,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:06:10,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:06:10,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:06:10,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:06:10,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:06:10,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:06:10,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:06:10,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:06:10,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:06:10,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:06:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:06:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:06:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:06:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:06:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:06:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:06:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:06:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:06:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:06:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:06:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:06:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:06:10,639 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:06:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:06:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:06:10,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:06:14,960 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:06:14,960 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:06:14,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:06:14 BoogieIcfgContainer [2020-10-13 14:06:14,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:06:14,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:06:14,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:06:14,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:06:14,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:06:07" (1/3) ... [2020-10-13 14:06:14,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d721674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:06:14, skipping insertion in model container [2020-10-13 14:06:14,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:06:10" (2/3) ... [2020-10-13 14:06:14,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d721674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:06:14, skipping insertion in model container [2020-10-13 14:06:14,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:06:14" (3/3) ... [2020-10-13 14:06:14,984 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:06:14,996 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:06:15,006 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:06:15,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:06:15,056 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:06:15,056 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:06:15,056 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:06:15,056 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:06:15,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:06:15,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:06:15,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:06:15,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:06:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states. [2020-10-13 14:06:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-13 14:06:15,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:15,135 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] [2020-10-13 14:06:15,135 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash -713366920, now seen corresponding path program 1 times [2020-10-13 14:06:15,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:15,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777501037] [2020-10-13 14:06:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:17,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:18,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:21,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:21,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-13 14:06:21,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:06:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 14:06:21,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-13 14:06:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 14:06:21,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:06:22,620 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:06:22,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:22,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:22,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:22,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:22,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 14:06:22,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:22,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:22,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:22,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:22,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:22,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777501037] [2020-10-13 14:06:22,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:22,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:22,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255027322] [2020-10-13 14:06:22,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:22,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:22,925 INFO L87 Difference]: Start difference. First operand 1439 states. Second operand 4 states. [2020-10-13 14:06:23,840 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-13 14:06:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:35,915 INFO L93 Difference]: Finished difference Result 2885 states and 5050 transitions. [2020-10-13 14:06:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:35,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 360 [2020-10-13 14:06:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:35,970 INFO L225 Difference]: With dead ends: 2885 [2020-10-13 14:06:35,970 INFO L226 Difference]: Without dead ends: 2009 [2020-10-13 14:06:35,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:06:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-10-13 14:06:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 2007. [2020-10-13 14:06:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2007 states. [2020-10-13 14:06:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3353 transitions. [2020-10-13 14:06:36,169 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3353 transitions. Word has length 360 [2020-10-13 14:06:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:36,173 INFO L479 AbstractCegarLoop]: Abstraction has 2007 states and 3353 transitions. [2020-10-13 14:06:36,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3353 transitions. [2020-10-13 14:06:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-13 14:06:36,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:36,192 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] [2020-10-13 14:06:36,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:06:36,193 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -141270056, now seen corresponding path program 1 times [2020-10-13 14:06:36,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:36,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961001075] [2020-10-13 14:06:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:37,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:41,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:41,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-10-13 14:06:41,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:06:41,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 14:06:41,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:41,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-13 14:06:41,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:06:41,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:06:42,803 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:06:42,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:06:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:42,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:42,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:06:42,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:06:42,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 14:06:42,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:42,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:06:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:06:42,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:06:42,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:06:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:06:43,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961001075] [2020-10-13 14:06:43,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:06:43,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:06:43,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082230493] [2020-10-13 14:06:43,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:06:43,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:06:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:06:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:06:43,092 INFO L87 Difference]: Start difference. First operand 2007 states and 3353 transitions. Second operand 4 states. [2020-10-13 14:06:43,919 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-13 14:06:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:06:54,563 INFO L93 Difference]: Finished difference Result 4414 states and 7290 transitions. [2020-10-13 14:06:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:06:54,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 362 [2020-10-13 14:06:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:06:54,582 INFO L225 Difference]: With dead ends: 4414 [2020-10-13 14:06:54,582 INFO L226 Difference]: Without dead ends: 3001 [2020-10-13 14:06:54,587 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 14:06:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2020-10-13 14:06:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2999. [2020-10-13 14:06:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2999 states. [2020-10-13 14:06:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4968 transitions. [2020-10-13 14:06:54,703 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4968 transitions. Word has length 362 [2020-10-13 14:06:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:06:54,705 INFO L479 AbstractCegarLoop]: Abstraction has 2999 states and 4968 transitions. [2020-10-13 14:06:54,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:06:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4968 transitions. [2020-10-13 14:06:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-13 14:06:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:06:54,717 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] [2020-10-13 14:06:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:06:54,718 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:06:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:06:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2017020874, now seen corresponding path program 1 times [2020-10-13 14:06:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:06:54,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535765719] [2020-10-13 14:06:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:06:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:06:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:55,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:56,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:56,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:06:59,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:06:59,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-13 14:06:59,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:06:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 14:06:59,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:06:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:06:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-13 14:06:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:06:59,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:01,001 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:07:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:01,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:01,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:01,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:07:01,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:07:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:01,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535765719] [2020-10-13 14:07:01,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:01,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:01,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839928161] [2020-10-13 14:07:01,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:01,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:01,197 INFO L87 Difference]: Start difference. First operand 2999 states and 4968 transitions. Second operand 4 states. [2020-10-13 14:07:02,083 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-13 14:07:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:11,704 INFO L93 Difference]: Finished difference Result 7054 states and 11582 transitions. [2020-10-13 14:07:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:11,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 364 [2020-10-13 14:07:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:11,727 INFO L225 Difference]: With dead ends: 7054 [2020-10-13 14:07:11,728 INFO L226 Difference]: Without dead ends: 4672 [2020-10-13 14:07:11,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:07:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2020-10-13 14:07:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4670. [2020-10-13 14:07:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4670 states. [2020-10-13 14:07:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 7674 transitions. [2020-10-13 14:07:11,911 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 7674 transitions. Word has length 364 [2020-10-13 14:07:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:11,912 INFO L479 AbstractCegarLoop]: Abstraction has 4670 states and 7674 transitions. [2020-10-13 14:07:11,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 7674 transitions. [2020-10-13 14:07:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-13 14:07:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:11,934 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] [2020-10-13 14:07:11,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:07:11,936 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -528454664, now seen corresponding path program 1 times [2020-10-13 14:07:11,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:11,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754401207] [2020-10-13 14:07:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:12,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:13,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:14,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:14,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:15,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:16,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:16,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:17,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:17,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-13 14:07:17,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 14:07:17,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-13 14:07:17,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-13 14:07:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:07:17,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:18,063 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:07:18,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:18,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:18,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:18,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:18,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754401207] [2020-10-13 14:07:18,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:18,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:18,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378534289] [2020-10-13 14:07:18,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:18,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:18,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:18,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:18,255 INFO L87 Difference]: Start difference. First operand 4670 states and 7674 transitions. Second operand 4 states. [2020-10-13 14:07:19,096 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-13 14:07:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:28,498 INFO L93 Difference]: Finished difference Result 11409 states and 18611 transitions. [2020-10-13 14:07:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:28,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 366 [2020-10-13 14:07:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:28,529 INFO L225 Difference]: With dead ends: 11409 [2020-10-13 14:07:28,530 INFO L226 Difference]: Without dead ends: 7379 [2020-10-13 14:07:28,541 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 14:07:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2020-10-13 14:07:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7377. [2020-10-13 14:07:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7377 states. [2020-10-13 14:07:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7377 states to 7377 states and 12020 transitions. [2020-10-13 14:07:28,809 INFO L78 Accepts]: Start accepts. Automaton has 7377 states and 12020 transitions. Word has length 366 [2020-10-13 14:07:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:28,810 INFO L479 AbstractCegarLoop]: Abstraction has 7377 states and 12020 transitions. [2020-10-13 14:07:28,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7377 states and 12020 transitions. [2020-10-13 14:07:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-13 14:07:28,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:28,828 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] [2020-10-13 14:07:28,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:07:28,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1546155164, now seen corresponding path program 1 times [2020-10-13 14:07:28,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:28,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146284859] [2020-10-13 14:07:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:29,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:30,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:32,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:34,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-13 14:07:34,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:07:34,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 14:07:34,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-13 14:07:34,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:07:34,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:07:34,937 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:07:34,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:34,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:34,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:35,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146284859] [2020-10-13 14:07:35,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:35,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:35,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493195148] [2020-10-13 14:07:35,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:35,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:35,080 INFO L87 Difference]: Start difference. First operand 7377 states and 12020 transitions. Second operand 4 states. [2020-10-13 14:07:35,926 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-10-13 14:07:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:07:45,846 INFO L93 Difference]: Finished difference Result 18228 states and 29488 transitions. [2020-10-13 14:07:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:07:45,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2020-10-13 14:07:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:07:45,888 INFO L225 Difference]: With dead ends: 18228 [2020-10-13 14:07:45,888 INFO L226 Difference]: Without dead ends: 11514 [2020-10-13 14:07:45,902 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 14:07:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11514 states. [2020-10-13 14:07:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11514 to 11512. [2020-10-13 14:07:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11512 states. [2020-10-13 14:07:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 18562 transitions. [2020-10-13 14:07:46,300 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 18562 transitions. Word has length 368 [2020-10-13 14:07:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:07:46,301 INFO L479 AbstractCegarLoop]: Abstraction has 11512 states and 18562 transitions. [2020-10-13 14:07:46,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:07:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 18562 transitions. [2020-10-13 14:07:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-13 14:07:46,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:07:46,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:07:46,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:07:46,328 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:07:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:07:46,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1031683944, now seen corresponding path program 1 times [2020-10-13 14:07:46,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:07:46,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933601565] [2020-10-13 14:07:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:07:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:48,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:49,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:51,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:51,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 376 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 230 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-13 14:07:51,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:52,421 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:07:52,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:07:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:07:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:07:52,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:07:52,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:07:52,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:07:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:07:52,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:07:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:07:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:07:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:07:52,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:07:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:07:52,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933601565] [2020-10-13 14:07:52,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:07:52,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:07:52,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070538447] [2020-10-13 14:07:52,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:07:52,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:07:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:07:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:07:52,615 INFO L87 Difference]: Start difference. First operand 11512 states and 18562 transitions. Second operand 4 states. [2020-10-13 14:07:53,482 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-10-13 14:08:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:03,834 INFO L93 Difference]: Finished difference Result 19693 states and 32252 transitions. [2020-10-13 14:08:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:08:03,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2020-10-13 14:08:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:03,869 INFO L225 Difference]: With dead ends: 19693 [2020-10-13 14:08:03,870 INFO L226 Difference]: Without dead ends: 16283 [2020-10-13 14:08:03,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:08:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2020-10-13 14:08:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 16281. [2020-10-13 14:08:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16281 states. [2020-10-13 14:08:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16281 states to 16281 states and 26410 transitions. [2020-10-13 14:08:04,403 INFO L78 Accepts]: Start accepts. Automaton has 16281 states and 26410 transitions. Word has length 370 [2020-10-13 14:08:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:04,403 INFO L479 AbstractCegarLoop]: Abstraction has 16281 states and 26410 transitions. [2020-10-13 14:08:04,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:08:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16281 states and 26410 transitions. [2020-10-13 14:08:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 14:08:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:04,425 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] [2020-10-13 14:08:04,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:08:04,426 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 946190870, now seen corresponding path program 1 times [2020-10-13 14:08:04,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:04,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664121490] [2020-10-13 14:08:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:05,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:06,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:07,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:09,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:09,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-13 14:08:09,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:08:09,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 14:08:09,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:09,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:08:09,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:08:09,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-13 14:08:09,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:10,529 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:08:10,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:10,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:10,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:10,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:10,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:10,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664121490] [2020-10-13 14:08:10,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:10,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:10,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058278434] [2020-10-13 14:08:10,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:08:10,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:10,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:08:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:08:10,738 INFO L87 Difference]: Start difference. First operand 16281 states and 26410 transitions. Second operand 5 states. [2020-10-13 14:08:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:27,101 INFO L93 Difference]: Finished difference Result 48472 states and 78633 transitions. [2020-10-13 14:08:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:08:27,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 371 [2020-10-13 14:08:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:27,153 INFO L225 Difference]: With dead ends: 48472 [2020-10-13 14:08:27,154 INFO L226 Difference]: Without dead ends: 32208 [2020-10-13 14:08:27,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32208 states. [2020-10-13 14:08:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32208 to 32206. [2020-10-13 14:08:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32206 states. [2020-10-13 14:08:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32206 states to 32206 states and 52097 transitions. [2020-10-13 14:08:28,357 INFO L78 Accepts]: Start accepts. Automaton has 32206 states and 52097 transitions. Word has length 371 [2020-10-13 14:08:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:28,358 INFO L479 AbstractCegarLoop]: Abstraction has 32206 states and 52097 transitions. [2020-10-13 14:08:28,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:08:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32206 states and 52097 transitions. [2020-10-13 14:08:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-13 14:08:28,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:28,392 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] [2020-10-13 14:08:28,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:08:28,392 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash -577465735, now seen corresponding path program 1 times [2020-10-13 14:08:28,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:28,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790174979] [2020-10-13 14:08:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:28,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:28,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:29,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:29,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:31,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:31,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:31,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:33,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:08:33,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:08:33,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-13 14:08:33,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:34,628 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:08:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:08:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:34,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:34,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:08:34,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:08:34,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:08:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 14:08:34,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:08:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:08:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:08:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:08:34,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:08:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:08:34,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790174979] [2020-10-13 14:08:34,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:08:34,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:08:34,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929406060] [2020-10-13 14:08:34,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:08:34,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:08:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:08:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:08:34,862 INFO L87 Difference]: Start difference. First operand 32206 states and 52097 transitions. Second operand 5 states. [2020-10-13 14:08:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:08:54,575 INFO L93 Difference]: Finished difference Result 95832 states and 155010 transitions. [2020-10-13 14:08:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:08:54,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 373 [2020-10-13 14:08:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:08:54,675 INFO L225 Difference]: With dead ends: 95832 [2020-10-13 14:08:54,676 INFO L226 Difference]: Without dead ends: 63708 [2020-10-13 14:08:54,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:08:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63708 states. [2020-10-13 14:08:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63708 to 63706. [2020-10-13 14:08:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63706 states. [2020-10-13 14:08:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63706 states to 63706 states and 102747 transitions. [2020-10-13 14:08:59,553 INFO L78 Accepts]: Start accepts. Automaton has 63706 states and 102747 transitions. Word has length 373 [2020-10-13 14:08:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:08:59,553 INFO L479 AbstractCegarLoop]: Abstraction has 63706 states and 102747 transitions. [2020-10-13 14:08:59,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:08:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 63706 states and 102747 transitions. [2020-10-13 14:08:59,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-13 14:08:59,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:08:59,598 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] [2020-10-13 14:08:59,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:08:59,598 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:08:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:08:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1732297205, now seen corresponding path program 1 times [2020-10-13 14:08:59,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:08:59,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975855312] [2020-10-13 14:08:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:08:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:08:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:08:59,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:01,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:01,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:02,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:03,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:04,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:04,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 383 [2020-10-13 14:09:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:09:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 14:09:04,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:09:04,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:09:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-13 14:09:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:05,709 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:09:05,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:05,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:05,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:05,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:05,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:05,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975855312] [2020-10-13 14:09:05,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:05,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:09:05,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985212986] [2020-10-13 14:09:05,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:09:05,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:09:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:09:05,916 INFO L87 Difference]: Start difference. First operand 63706 states and 102747 transitions. Second operand 5 states. [2020-10-13 14:09:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:09:28,796 INFO L93 Difference]: Finished difference Result 189638 states and 305829 transitions. [2020-10-13 14:09:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:09:28,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 377 [2020-10-13 14:09:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:09:28,981 INFO L225 Difference]: With dead ends: 189638 [2020-10-13 14:09:28,982 INFO L226 Difference]: Without dead ends: 125968 [2020-10-13 14:09:29,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:09:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125968 states. [2020-10-13 14:09:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125968 to 125966. [2020-10-13 14:09:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125966 states. [2020-10-13 14:09:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125966 states to 125966 states and 202487 transitions. [2020-10-13 14:09:38,580 INFO L78 Accepts]: Start accepts. Automaton has 125966 states and 202487 transitions. Word has length 377 [2020-10-13 14:09:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:09:38,581 INFO L479 AbstractCegarLoop]: Abstraction has 125966 states and 202487 transitions. [2020-10-13 14:09:38,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:09:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 125966 states and 202487 transitions. [2020-10-13 14:09:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-13 14:09:38,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:09:38,690 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] [2020-10-13 14:09:38,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:09:38,691 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:09:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:09:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash -157362385, now seen corresponding path program 1 times [2020-10-13 14:09:38,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:09:38,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583256160] [2020-10-13 14:09:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:09:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:38,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:40,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:43,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:43,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-13 14:09:43,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:09:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 14:09:43,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:09:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:09:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:09:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:44,767 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-10-13 14:09:44,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:09:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:09:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:09:44,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:09:44,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:09:44,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:09:44,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:09:44,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:09:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:09:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:09:44,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:09:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:09:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:09:44,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583256160] [2020-10-13 14:09:44,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:09:44,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:09:44,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888789896] [2020-10-13 14:09:44,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:09:44,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:09:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:09:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:09:44,874 INFO L87 Difference]: Start difference. First operand 125966 states and 202487 transitions. Second operand 4 states.