/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:13:57,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:13:57,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:13:57,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:13:57,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:13:57,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:13:57,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:13:57,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:13:57,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:13:57,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:13:57,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:13:57,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:13:57,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:13:57,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:13:57,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:13:57,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:13:57,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:13:57,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:13:57,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:13:57,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:13:57,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:13:57,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:13:57,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:13:57,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:13:57,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:13:57,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:13:57,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:13:57,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:13:57,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:13:57,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:13:57,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:13:57,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:13:57,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:13:57,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:13:57,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:13:57,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:13:57,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:13:57,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:13:57,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:13:57,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:13:57,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:13:57,501 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 14:13:57,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:13:57,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:13:57,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:13:57,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:13:57,530 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:13:57,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:13:57,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:13:57,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:13:57,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:13:57,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:13:57,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:13:57,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:13:57,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:13:57,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:13:57,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:13:57,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:13:57,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:13:57,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:13:57,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:13:57,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:13:57,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:13:57,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:13:57,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:13:57,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:13:57,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:13:57,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:13:57,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:13:57,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:13:57,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:13:57,537 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 14:13:57,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:13:57,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:13:57,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:13:57,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:13:57,849 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:13:57,850 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:13:57,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4394a89f/48baa9ad66a74d7998b6bb5db303b8f5/FLAG43f01837b [2020-10-13 14:13:58,471 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:13:58,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:13:58,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4394a89f/48baa9ad66a74d7998b6bb5db303b8f5/FLAG43f01837b [2020-10-13 14:13:58,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4394a89f/48baa9ad66a74d7998b6bb5db303b8f5 [2020-10-13 14:13:58,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:13:58,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:13:58,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:13:58,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:13:58,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:13:58,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:13:58" (1/1) ... [2020-10-13 14:13:58,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:58, skipping insertion in model container [2020-10-13 14:13:58,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:13:58" (1/1) ... [2020-10-13 14:13:58,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:13:58,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:13:59,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:13:59,217 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:13:59,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:13:59,399 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:13:59,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59 WrapperNode [2020-10-13 14:13:59,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:13:59,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:13:59,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:13:59,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:13:59,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (1/1) ... [2020-10-13 14:13:59,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:13:59,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:13:59,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:13:59,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:13:59,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (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 14:13:59,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:13:59,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:13:59,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:13:59,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:13:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:13:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:13:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:13:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:13:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:13:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:13:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:14:00,166 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:14:00,166 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:14:00,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:14:00 BoogieIcfgContainer [2020-10-13 14:14:00,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:14:00,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:14:00,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:14:00,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:14:00,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:13:58" (1/3) ... [2020-10-13 14:14:00,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a8064d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:14:00, skipping insertion in model container [2020-10-13 14:14:00,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:13:59" (2/3) ... [2020-10-13 14:14:00,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a8064d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:14:00, skipping insertion in model container [2020-10-13 14:14:00,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:14:00" (3/3) ... [2020-10-13 14:14:00,181 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:14:00,192 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:14:00,199 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:14:00,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:14:00,235 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:14:00,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:14:00,235 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:14:00,235 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:14:00,236 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:14:00,236 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:14:00,236 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:14:00,236 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:14:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-10-13 14:14:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 14:14:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:00,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:00,269 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:00,274 INFO L82 PathProgramCache]: Analyzing trace with hash 542345027, now seen corresponding path program 1 times [2020-10-13 14:14:00,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:00,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215439152] [2020-10-13 14:14:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:03,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 14:14:03,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:14:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2944 [2020-10-13 14:14:03,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:14:03,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:14:03,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:14:03,789 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:03,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:03,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:03,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:03,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:03,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:14:03,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:03,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:03,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:03,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:03,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:03,832 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 14:14:03,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215439152] [2020-10-13 14:14:03,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:03,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:03,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188851500] [2020-10-13 14:14:03,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:03,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:03,862 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-10-13 14:14:04,090 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:14:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:04,630 INFO L93 Difference]: Finished difference Result 184 states and 293 transitions. [2020-10-13 14:14:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:04,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-13 14:14:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:04,651 INFO L225 Difference]: With dead ends: 184 [2020-10-13 14:14:04,651 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 14:14:04,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 14:14:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-10-13 14:14:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 14:14:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2020-10-13 14:14:04,727 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 51 [2020-10-13 14:14:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:04,728 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2020-10-13 14:14:04,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2020-10-13 14:14:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:14:04,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:04,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:04,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:14:04,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2107395660, now seen corresponding path program 1 times [2020-10-13 14:14:04,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:04,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77077708] [2020-10-13 14:14:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:04,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:06,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:06,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:14:06,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:14:06,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-13 14:14:06,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:14:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:14:06,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:06,427 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:06,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:06,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:06,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:06,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:14:06,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:06,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:06,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:06,460 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 14:14:06,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77077708] [2020-10-13 14:14:06,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:06,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:06,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104423904] [2020-10-13 14:14:06,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:06,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:06,465 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand 4 states. [2020-10-13 14:14:06,620 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:14:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:07,049 INFO L93 Difference]: Finished difference Result 284 states and 433 transitions. [2020-10-13 14:14:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:07,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:14:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:07,053 INFO L225 Difference]: With dead ends: 284 [2020-10-13 14:14:07,054 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 14:14:07,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 14:14:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-13 14:14:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 14:14:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 287 transitions. [2020-10-13 14:14:07,078 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 287 transitions. Word has length 52 [2020-10-13 14:14:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:07,079 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 287 transitions. [2020-10-13 14:14:07,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 287 transitions. [2020-10-13 14:14:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:14:07,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:07,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:07,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:14:07,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash 844287665, now seen corresponding path program 1 times [2020-10-13 14:14:07,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:07,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076470397] [2020-10-13 14:14:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:07,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:07,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:14:07,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:14:07,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-13 14:14:07,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:14:07,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:14:07,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:07,929 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:07,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:07,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:07,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:07,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:07,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:07,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:14:07,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:07,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:07,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:14:07,967 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 14:14:07,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076470397] [2020-10-13 14:14:07,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:07,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:07,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669848515] [2020-10-13 14:14:07,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:07,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:07,972 INFO L87 Difference]: Start difference. First operand 192 states and 287 transitions. Second operand 4 states. [2020-10-13 14:14:08,122 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:14:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:08,493 INFO L93 Difference]: Finished difference Result 484 states and 749 transitions. [2020-10-13 14:14:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:08,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:14:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:08,497 INFO L225 Difference]: With dead ends: 484 [2020-10-13 14:14:08,497 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 14:14:08,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 14:14:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2020-10-13 14:14:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-13 14:14:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 487 transitions. [2020-10-13 14:14:08,527 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 487 transitions. Word has length 53 [2020-10-13 14:14:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:08,527 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 487 transitions. [2020-10-13 14:14:08,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 487 transitions. [2020-10-13 14:14:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:14:08,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:08,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:08,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:14:08,530 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 337531448, now seen corresponding path program 1 times [2020-10-13 14:14:08,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:08,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084880229] [2020-10-13 14:14:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:08,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:08,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:08,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:09,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:09,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:14:09,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:14:09,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-13 14:14:09,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 14:14:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:14:09,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:10,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:10,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:10,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:10,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:14:10,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:10,059 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 14:14:10,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084880229] [2020-10-13 14:14:10,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:10,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:10,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219911121] [2020-10-13 14:14:10,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:10,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:10,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:10,062 INFO L87 Difference]: Start difference. First operand 320 states and 487 transitions. Second operand 4 states. [2020-10-13 14:14:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:10,513 INFO L93 Difference]: Finished difference Result 836 states and 1297 transitions. [2020-10-13 14:14:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:10,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:14:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:10,518 INFO L225 Difference]: With dead ends: 836 [2020-10-13 14:14:10,518 INFO L226 Difference]: Without dead ends: 546 [2020-10-13 14:14:10,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-13 14:14:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-10-13 14:14:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-10-13 14:14:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 831 transitions. [2020-10-13 14:14:10,552 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 831 transitions. Word has length 54 [2020-10-13 14:14:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:10,552 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 831 transitions. [2020-10-13 14:14:10,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 831 transitions. [2020-10-13 14:14:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:10,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:10,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:10,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:14:10,555 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1377694483, now seen corresponding path program 1 times [2020-10-13 14:14:10,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:10,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434679936] [2020-10-13 14:14:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:14,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:14,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:14:14,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:14:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4106 [2020-10-13 14:14:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:14:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:14:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:14,883 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:14,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:14,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:14,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:14:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:14,918 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 14:14:14,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434679936] [2020-10-13 14:14:14,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:14,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:14:14,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918777490] [2020-10-13 14:14:14,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:14:14,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:14:14,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:14:14,923 INFO L87 Difference]: Start difference. First operand 544 states and 831 transitions. Second operand 7 states. [2020-10-13 14:14:15,120 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 14:14:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:15,985 INFO L93 Difference]: Finished difference Result 4632 states and 7191 transitions. [2020-10-13 14:14:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:14:15,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:14:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:16,042 INFO L225 Difference]: With dead ends: 4632 [2020-10-13 14:14:16,042 INFO L226 Difference]: Without dead ends: 4118 [2020-10-13 14:14:16,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:14:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-10-13 14:14:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 1552. [2020-10-13 14:14:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1552 states. [2020-10-13 14:14:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2391 transitions. [2020-10-13 14:14:16,169 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2391 transitions. Word has length 55 [2020-10-13 14:14:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:16,170 INFO L479 AbstractCegarLoop]: Abstraction has 1552 states and 2391 transitions. [2020-10-13 14:14:16,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:14:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2391 transitions. [2020-10-13 14:14:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:16,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:16,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:16,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:14:16,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1643404808, now seen corresponding path program 1 times [2020-10-13 14:14:16,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:16,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668078697] [2020-10-13 14:14:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:16,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:17,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:14:17,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:14:17,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 14:14:17,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:14:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:14:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:14:17,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:17,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:17,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:17,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:17,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:17,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:14:17,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:17,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:17,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:14:17,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:14:17,250 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 14:14:17,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668078697] [2020-10-13 14:14:17,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:17,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:14:17,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656738858] [2020-10-13 14:14:17,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:14:17,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:14:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:14:17,253 INFO L87 Difference]: Start difference. First operand 1552 states and 2391 transitions. Second operand 6 states. [2020-10-13 14:14:17,398 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:14:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:17,959 INFO L93 Difference]: Finished difference Result 3572 states and 5513 transitions. [2020-10-13 14:14:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:14:17,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-13 14:14:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:17,975 INFO L225 Difference]: With dead ends: 3572 [2020-10-13 14:14:17,975 INFO L226 Difference]: Without dead ends: 2554 [2020-10-13 14:14:17,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:14:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2020-10-13 14:14:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2048. [2020-10-13 14:14:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2020-10-13 14:14:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3135 transitions. [2020-10-13 14:14:18,188 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3135 transitions. Word has length 55 [2020-10-13 14:14:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:18,188 INFO L479 AbstractCegarLoop]: Abstraction has 2048 states and 3135 transitions. [2020-10-13 14:14:18,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:14:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3135 transitions. [2020-10-13 14:14:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:14:18,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:18,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:18,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:14:18,198 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -69335112, now seen corresponding path program 1 times [2020-10-13 14:14:18,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:18,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820235558] [2020-10-13 14:14:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:18,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:18,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:14:18,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:14:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-13 14:14:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:14:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:14:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:14:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:19,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:19,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:19,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:19,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:19,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:14:19,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:19,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:19,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:19,151 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 14:14:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820235558] [2020-10-13 14:14:19,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:19,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:14:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306014819] [2020-10-13 14:14:19,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:14:19,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:14:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:14:19,154 INFO L87 Difference]: Start difference. First operand 2048 states and 3135 transitions. Second operand 7 states. [2020-10-13 14:14:19,302 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-13 14:14:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:20,968 INFO L93 Difference]: Finished difference Result 18192 states and 27975 transitions. [2020-10-13 14:14:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:14:20,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:14:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:21,073 INFO L225 Difference]: With dead ends: 18192 [2020-10-13 14:14:21,074 INFO L226 Difference]: Without dead ends: 16174 [2020-10-13 14:14:21,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:14:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2020-10-13 14:14:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 4064. [2020-10-13 14:14:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-13 14:14:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 6111 transitions. [2020-10-13 14:14:21,707 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 6111 transitions. Word has length 55 [2020-10-13 14:14:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:21,708 INFO L479 AbstractCegarLoop]: Abstraction has 4064 states and 6111 transitions. [2020-10-13 14:14:21,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:14:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 6111 transitions. [2020-10-13 14:14:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:14:21,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:21,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:21,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:14:21,712 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1215290674, now seen corresponding path program 1 times [2020-10-13 14:14:21,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:21,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145638040] [2020-10-13 14:14:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:22,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:22,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:14:22,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:14:22,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-13 14:14:22,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:22,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:14:22,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 14:14:22,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:14:22,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:22,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:22,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:14:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:22,667 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 14:14:22,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145638040] [2020-10-13 14:14:22,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:22,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:14:22,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418552995] [2020-10-13 14:14:22,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:14:22,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:14:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:14:22,675 INFO L87 Difference]: Start difference. First operand 4064 states and 6111 transitions. Second operand 7 states. [2020-10-13 14:14:22,843 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:14:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:24,498 INFO L93 Difference]: Finished difference Result 20208 states and 30439 transitions. [2020-10-13 14:14:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:14:24,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:14:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:24,557 INFO L225 Difference]: With dead ends: 20208 [2020-10-13 14:14:24,557 INFO L226 Difference]: Without dead ends: 16174 [2020-10-13 14:14:24,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:14:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2020-10-13 14:14:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 4064. [2020-10-13 14:14:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4064 states. [2020-10-13 14:14:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4064 states to 4064 states and 6047 transitions. [2020-10-13 14:14:25,102 INFO L78 Accepts]: Start accepts. Automaton has 4064 states and 6047 transitions. Word has length 57 [2020-10-13 14:14:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:25,103 INFO L479 AbstractCegarLoop]: Abstraction has 4064 states and 6047 transitions. [2020-10-13 14:14:25,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:14:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4064 states and 6047 transitions. [2020-10-13 14:14:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:14:25,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:25,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:25,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:14:25,105 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1195241331, now seen corresponding path program 1 times [2020-10-13 14:14:25,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:25,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162121577] [2020-10-13 14:14:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:25,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:14:25,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:14:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 14:14:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:14:25,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:14:25,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:25,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:25,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:25,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:14:25,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:25,800 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 14:14:25,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162121577] [2020-10-13 14:14:25,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:25,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:25,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552683700] [2020-10-13 14:14:25,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:25,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:25,805 INFO L87 Difference]: Start difference. First operand 4064 states and 6047 transitions. Second operand 4 states. [2020-10-13 14:14:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:26,707 INFO L93 Difference]: Finished difference Result 10244 states and 15201 transitions. [2020-10-13 14:14:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:14:26,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:14:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:26,725 INFO L225 Difference]: With dead ends: 10244 [2020-10-13 14:14:26,726 INFO L226 Difference]: Without dead ends: 6210 [2020-10-13 14:14:26,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2020-10-13 14:14:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 6208. [2020-10-13 14:14:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6208 states. [2020-10-13 14:14:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 8991 transitions. [2020-10-13 14:14:27,292 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 8991 transitions. Word has length 57 [2020-10-13 14:14:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:27,293 INFO L479 AbstractCegarLoop]: Abstraction has 6208 states and 8991 transitions. [2020-10-13 14:14:27,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 8991 transitions. [2020-10-13 14:14:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:14:27,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:27,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:27,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:14:27,294 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -982604156, now seen corresponding path program 1 times [2020-10-13 14:14:27,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:27,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766536557] [2020-10-13 14:14:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:27,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:14:27,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:14:27,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 14:14:27,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:14:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:14:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:14:27,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:27,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:14:27,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:27,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:27,881 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 14:14:27,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766536557] [2020-10-13 14:14:27,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:27,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:14:27,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463705974] [2020-10-13 14:14:27,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:14:27,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:14:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:27,884 INFO L87 Difference]: Start difference. First operand 6208 states and 8991 transitions. Second operand 5 states. [2020-10-13 14:14:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:28,904 INFO L93 Difference]: Finished difference Result 9926 states and 14317 transitions. [2020-10-13 14:14:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:14:28,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:14:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:28,926 INFO L225 Difference]: With dead ends: 9926 [2020-10-13 14:14:28,926 INFO L226 Difference]: Without dead ends: 9924 [2020-10-13 14:14:28,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:14:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2020-10-13 14:14:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 6336. [2020-10-13 14:14:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6336 states. [2020-10-13 14:14:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6336 states to 6336 states and 9055 transitions. [2020-10-13 14:14:29,620 INFO L78 Accepts]: Start accepts. Automaton has 6336 states and 9055 transitions. Word has length 58 [2020-10-13 14:14:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:29,621 INFO L479 AbstractCegarLoop]: Abstraction has 6336 states and 9055 transitions. [2020-10-13 14:14:29,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:14:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6336 states and 9055 transitions. [2020-10-13 14:14:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:14:29,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:29,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:29,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:14:29,622 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1592604672, now seen corresponding path program 1 times [2020-10-13 14:14:29,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:29,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923572090] [2020-10-13 14:14:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:29,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:29,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:29,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:14:29,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:14:29,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-13 14:14:29,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:29,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:29,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:14:29,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:14:29,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:30,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:30,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:30,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:30,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:30,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:14:30,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:30,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:30,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:30,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:30,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:30,129 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 14:14:30,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923572090] [2020-10-13 14:14:30,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:30,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:14:30,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838139099] [2020-10-13 14:14:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:14:30,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:14:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:14:30,133 INFO L87 Difference]: Start difference. First operand 6336 states and 9055 transitions. Second operand 4 states. [2020-10-13 14:14:30,280 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-13 14:14:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:31,254 INFO L93 Difference]: Finished difference Result 14566 states and 20899 transitions. [2020-10-13 14:14:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:14:31,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-13 14:14:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:31,268 INFO L225 Difference]: With dead ends: 14566 [2020-10-13 14:14:31,269 INFO L226 Difference]: Without dead ends: 8260 [2020-10-13 14:14:31,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:14:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2020-10-13 14:14:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 8258. [2020-10-13 14:14:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8258 states. [2020-10-13 14:14:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8258 states to 8258 states and 11777 transitions. [2020-10-13 14:14:31,903 INFO L78 Accepts]: Start accepts. Automaton has 8258 states and 11777 transitions. Word has length 58 [2020-10-13 14:14:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:31,903 INFO L479 AbstractCegarLoop]: Abstraction has 8258 states and 11777 transitions. [2020-10-13 14:14:31,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:14:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8258 states and 11777 transitions. [2020-10-13 14:14:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:14:31,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:31,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:31,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:14:31,909 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1818301593, now seen corresponding path program 1 times [2020-10-13 14:14:31,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:31,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783541516] [2020-10-13 14:14:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:33,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:33,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:14:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:14:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 14:14:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:14:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:14:36,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:14:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:37,404 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:37,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:37,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:37,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:37,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:14:37,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:37,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:37,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:37,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:37,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:37,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783541516] [2020-10-13 14:14:37,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:37,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 14:14:37,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238848876] [2020-10-13 14:14:37,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:14:37,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:14:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:14:37,447 INFO L87 Difference]: Start difference. First operand 8258 states and 11777 transitions. Second operand 11 states. [2020-10-13 14:14:37,694 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:14:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:41,420 INFO L93 Difference]: Finished difference Result 22250 states and 31277 transitions. [2020-10-13 14:14:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 14:14:41,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-10-13 14:14:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:41,443 INFO L225 Difference]: With dead ends: 22250 [2020-10-13 14:14:41,444 INFO L226 Difference]: Without dead ends: 14024 [2020-10-13 14:14:41,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 14:14:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14024 states. [2020-10-13 14:14:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14024 to 8290. [2020-10-13 14:14:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8290 states. [2020-10-13 14:14:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 11769 transitions. [2020-10-13 14:14:42,211 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 11769 transitions. Word has length 80 [2020-10-13 14:14:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:42,211 INFO L479 AbstractCegarLoop]: Abstraction has 8290 states and 11769 transitions. [2020-10-13 14:14:42,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:14:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 11769 transitions. [2020-10-13 14:14:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:14:42,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:42,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:42,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:14:42,215 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash 466582131, now seen corresponding path program 1 times [2020-10-13 14:14:42,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:42,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587802249] [2020-10-13 14:14:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:42,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:42,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:47,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:47,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:14:47,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:14:47,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:14:47,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:47,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:14:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:14:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:14:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:47,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:47,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:47,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:47,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:14:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:14:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:14:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 14:14:47,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587802249] [2020-10-13 14:14:47,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:14:47,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:14:47,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146039946] [2020-10-13 14:14:47,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:14:47,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:14:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:14:47,448 INFO L87 Difference]: Start difference. First operand 8290 states and 11769 transitions. Second operand 6 states. [2020-10-13 14:14:47,608 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:14:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:48,623 INFO L93 Difference]: Finished difference Result 16569 states and 23532 transitions. [2020-10-13 14:14:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:14:48,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-13 14:14:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:48,635 INFO L225 Difference]: With dead ends: 16569 [2020-10-13 14:14:48,635 INFO L226 Difference]: Without dead ends: 8311 [2020-10-13 14:14:48,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:14:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2020-10-13 14:14:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8290. [2020-10-13 14:14:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8290 states. [2020-10-13 14:14:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 11769 transitions. [2020-10-13 14:14:49,466 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 11769 transitions. Word has length 80 [2020-10-13 14:14:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:49,466 INFO L479 AbstractCegarLoop]: Abstraction has 8290 states and 11769 transitions. [2020-10-13 14:14:49,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:14:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 11769 transitions. [2020-10-13 14:14:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:14:49,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:49,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:49,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:14:49,470 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash -96970718, now seen corresponding path program 1 times [2020-10-13 14:14:49,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:49,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736707834] [2020-10-13 14:14:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:52,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:52,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:54,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:54,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:14:54,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:14:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:14:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:14:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:14:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:14:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:14:54,947 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:14:54,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:14:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:54,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:14:54,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:14:54,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:14:54,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:14:54,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:14:54,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:14:54,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:14:54,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:14:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:14:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:14:55,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736707834] [2020-10-13 14:14:55,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:14:55,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 14:14:55,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561597923] [2020-10-13 14:14:55,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:14:55,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:14:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:14:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:14:55,032 INFO L87 Difference]: Start difference. First operand 8290 states and 11769 transitions. Second operand 10 states. [2020-10-13 14:14:55,216 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:14:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:14:58,211 INFO L93 Difference]: Finished difference Result 23580 states and 33156 transitions. [2020-10-13 14:14:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 14:14:58,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-13 14:14:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:14:58,229 INFO L225 Difference]: With dead ends: 23580 [2020-10-13 14:14:58,229 INFO L226 Difference]: Without dead ends: 17226 [2020-10-13 14:14:58,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:14:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2020-10-13 14:14:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 12402. [2020-10-13 14:14:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12402 states. [2020-10-13 14:14:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12402 states to 12402 states and 17569 transitions. [2020-10-13 14:14:59,869 INFO L78 Accepts]: Start accepts. Automaton has 12402 states and 17569 transitions. Word has length 80 [2020-10-13 14:14:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:14:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 12402 states and 17569 transitions. [2020-10-13 14:14:59,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 14:14:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 12402 states and 17569 transitions. [2020-10-13 14:14:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:14:59,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:14:59,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:14:59,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:14:59,872 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:14:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:14:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2107054290, now seen corresponding path program 1 times [2020-10-13 14:14:59,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:14:59,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631676597] [2020-10-13 14:14:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:14:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:14:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:14:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:01,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:04,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:04,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:15:04,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:15:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:15:04,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:15:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:15:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:15:04,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:05,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:05,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:05,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:05,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:05,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:05,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:05,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631676597] [2020-10-13 14:15:05,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:05,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:15:05,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79554906] [2020-10-13 14:15:05,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:15:05,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:15:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:15:05,231 INFO L87 Difference]: Start difference. First operand 12402 states and 17569 transitions. Second operand 9 states. [2020-10-13 14:15:05,402 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:15:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:08,744 INFO L93 Difference]: Finished difference Result 26661 states and 37505 transitions. [2020-10-13 14:15:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:15:08,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-13 14:15:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:08,763 INFO L225 Difference]: With dead ends: 26661 [2020-10-13 14:15:08,763 INFO L226 Difference]: Without dead ends: 17147 [2020-10-13 14:15:08,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-10-13 14:15:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17147 states. [2020-10-13 14:15:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17147 to 12402. [2020-10-13 14:15:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12402 states. [2020-10-13 14:15:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12402 states to 12402 states and 17553 transitions. [2020-10-13 14:15:10,170 INFO L78 Accepts]: Start accepts. Automaton has 12402 states and 17553 transitions. Word has length 80 [2020-10-13 14:15:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:10,170 INFO L479 AbstractCegarLoop]: Abstraction has 12402 states and 17553 transitions. [2020-10-13 14:15:10,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:15:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 12402 states and 17553 transitions. [2020-10-13 14:15:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:15:10,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:10,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:10,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:15:10,172 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1881575313, now seen corresponding path program 1 times [2020-10-13 14:15:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:10,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516300969] [2020-10-13 14:15:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:10,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:10,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:12,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:14,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:15,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:15,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:15:15,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:15:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:15:15,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:15:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:15:15,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:15:15,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:15,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:15,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:15,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:15:15,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:15,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:15,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516300969] [2020-10-13 14:15:15,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:15:15,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:15:15,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688106002] [2020-10-13 14:15:15,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:15:15,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:15:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:15,346 INFO L87 Difference]: Start difference. First operand 12402 states and 17553 transitions. Second operand 4 states. [2020-10-13 14:15:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:16,663 INFO L93 Difference]: Finished difference Result 21948 states and 31087 transitions. [2020-10-13 14:15:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:15:16,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:15:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:16,675 INFO L225 Difference]: With dead ends: 21948 [2020-10-13 14:15:16,675 INFO L226 Difference]: Without dead ends: 9578 [2020-10-13 14:15:16,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:15:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9578 states. [2020-10-13 14:15:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9578 to 9284. [2020-10-13 14:15:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9284 states. [2020-10-13 14:15:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9284 states to 9284 states and 13032 transitions. [2020-10-13 14:15:17,831 INFO L78 Accepts]: Start accepts. Automaton has 9284 states and 13032 transitions. Word has length 81 [2020-10-13 14:15:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:17,831 INFO L479 AbstractCegarLoop]: Abstraction has 9284 states and 13032 transitions. [2020-10-13 14:15:17,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:15:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9284 states and 13032 transitions. [2020-10-13 14:15:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:15:17,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:17,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:17,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:15:17,833 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1817156049, now seen corresponding path program 1 times [2020-10-13 14:15:17,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:17,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541181661] [2020-10-13 14:15:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:17,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:17,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:18,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:19,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:19,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:20,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:22,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:22,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:22,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:15:22,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:23,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:23,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:23,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:23,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:23,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:15:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:23,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541181661] [2020-10-13 14:15:23,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:23,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 14:15:23,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019643460] [2020-10-13 14:15:23,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:15:23,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:23,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:15:23,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:15:23,197 INFO L87 Difference]: Start difference. First operand 9284 states and 13032 transitions. Second operand 13 states. [2020-10-13 14:15:23,373 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:15:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:15:33,471 INFO L93 Difference]: Finished difference Result 65471 states and 90541 transitions. [2020-10-13 14:15:33,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 14:15:33,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2020-10-13 14:15:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:15:33,534 INFO L225 Difference]: With dead ends: 65471 [2020-10-13 14:15:33,535 INFO L226 Difference]: Without dead ends: 56245 [2020-10-13 14:15:33,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 14:15:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56245 states. [2020-10-13 14:15:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56245 to 29747. [2020-10-13 14:15:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29747 states. [2020-10-13 14:15:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29747 states to 29747 states and 41273 transitions. [2020-10-13 14:15:38,338 INFO L78 Accepts]: Start accepts. Automaton has 29747 states and 41273 transitions. Word has length 81 [2020-10-13 14:15:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:15:38,338 INFO L479 AbstractCegarLoop]: Abstraction has 29747 states and 41273 transitions. [2020-10-13 14:15:38,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:15:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29747 states and 41273 transitions. [2020-10-13 14:15:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:15:38,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:15:38,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:15:38,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:15:38,343 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:15:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:15:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1444630155, now seen corresponding path program 1 times [2020-10-13 14:15:38,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:15:38,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675658058] [2020-10-13 14:15:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:15:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:38,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:39,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:40,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:41,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:42,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:15:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:15:43,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:15:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:43,688 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 26 [2020-10-13 14:15:43,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:15:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:15:43,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:15:43,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:15:43,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:15:43,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:15:43,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:15:43,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:15:43,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:15:43,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:15:43,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:15:43,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:15:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:15:43,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675658058] [2020-10-13 14:15:43,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:15:43,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:15:43,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520347394] [2020-10-13 14:15:43,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:15:43,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:15:43,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:15:43,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:15:43,899 INFO L87 Difference]: Start difference. First operand 29747 states and 41273 transitions. Second operand 12 states. [2020-10-13 14:15:44,378 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-10-13 14:15:54,491 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-13 14:16:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:04,496 INFO L93 Difference]: Finished difference Result 132077 states and 180168 transitions. [2020-10-13 14:16:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 14:16:04,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-13 14:16:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:04,624 INFO L225 Difference]: With dead ends: 132077 [2020-10-13 14:16:04,625 INFO L226 Difference]: Without dead ends: 102435 [2020-10-13 14:16:04,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=550, Invalid=2642, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 14:16:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102435 states. [2020-10-13 14:16:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102435 to 54368. [2020-10-13 14:16:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54368 states. [2020-10-13 14:16:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54368 states to 54368 states and 75473 transitions. [2020-10-13 14:16:12,318 INFO L78 Accepts]: Start accepts. Automaton has 54368 states and 75473 transitions. Word has length 81 [2020-10-13 14:16:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:12,319 INFO L479 AbstractCegarLoop]: Abstraction has 54368 states and 75473 transitions. [2020-10-13 14:16:12,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:16:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 54368 states and 75473 transitions. [2020-10-13 14:16:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:16:12,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:12,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:16:12,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:16:12,324 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1040645354, now seen corresponding path program 1 times [2020-10-13 14:16:12,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:12,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484088014] [2020-10-13 14:16:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:12,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:12,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:13,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:13,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:15,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:15,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:16,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:17,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:17,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:16:17,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:16:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:16:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:16:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:16:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:16:17,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:16:17,512 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 14:16:17,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:17,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:17,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:17,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:17,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:16:17,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:16:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:16:17,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:16:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:16:17,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484088014] [2020-10-13 14:16:17,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:16:17,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:16:17,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174424213] [2020-10-13 14:16:17,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:16:17,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:16:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:16:17,565 INFO L87 Difference]: Start difference. First operand 54368 states and 75473 transitions. Second operand 6 states. [2020-10-13 14:16:18,447 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-13 14:16:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:24,093 INFO L93 Difference]: Finished difference Result 92006 states and 127671 transitions. [2020-10-13 14:16:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:16:24,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-13 14:16:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:24,140 INFO L225 Difference]: With dead ends: 92006 [2020-10-13 14:16:24,140 INFO L226 Difference]: Without dead ends: 37753 [2020-10-13 14:16:24,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:16:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37753 states. [2020-10-13 14:16:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37753 to 37753. [2020-10-13 14:16:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37753 states. [2020-10-13 14:16:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37753 states to 37753 states and 51988 transitions. [2020-10-13 14:16:29,627 INFO L78 Accepts]: Start accepts. Automaton has 37753 states and 51988 transitions. Word has length 81 [2020-10-13 14:16:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:29,627 INFO L479 AbstractCegarLoop]: Abstraction has 37753 states and 51988 transitions. [2020-10-13 14:16:29,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:16:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37753 states and 51988 transitions. [2020-10-13 14:16:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:16:29,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:29,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:16:29,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:16:29,630 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1981810642, now seen corresponding path program 1 times [2020-10-13 14:16:29,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:29,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391004101] [2020-10-13 14:16:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:30,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:30,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:34,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:34,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 14:16:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:34,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:34,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:34,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:34,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:34,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 14:16:34,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391004101] [2020-10-13 14:16:34,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:16:34,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:16:34,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153359340] [2020-10-13 14:16:34,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:16:34,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:16:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:16:34,783 INFO L87 Difference]: Start difference. First operand 37753 states and 51988 transitions. Second operand 4 states. [2020-10-13 14:16:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:16:41,106 INFO L93 Difference]: Finished difference Result 73203 states and 101011 transitions. [2020-10-13 14:16:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:16:41,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-13 14:16:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:16:41,146 INFO L225 Difference]: With dead ends: 73203 [2020-10-13 14:16:41,147 INFO L226 Difference]: Without dead ends: 35529 [2020-10-13 14:16:41,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:16:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35529 states. [2020-10-13 14:16:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35529 to 35529. [2020-10-13 14:16:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35529 states. [2020-10-13 14:16:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 48675 transitions. [2020-10-13 14:16:46,061 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 48675 transitions. Word has length 82 [2020-10-13 14:16:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:16:46,061 INFO L479 AbstractCegarLoop]: Abstraction has 35529 states and 48675 transitions. [2020-10-13 14:16:46,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:16:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 48675 transitions. [2020-10-13 14:16:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:16:46,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:16:46,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:16:46,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:16:46,064 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:16:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:16:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1403156433, now seen corresponding path program 1 times [2020-10-13 14:16:46,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:16:46,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027090445] [2020-10-13 14:16:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:16:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:46,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:46,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:46,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:46,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:51,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:16:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:16:51,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:16:51,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:16:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:16:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:16:51,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:16:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:16:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:16:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:16:51,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027090445] [2020-10-13 14:16:51,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:16:51,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:16:51,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695712772] [2020-10-13 14:16:51,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:16:51,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:16:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:16:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:16:51,375 INFO L87 Difference]: Start difference. First operand 35529 states and 48675 transitions. Second operand 9 states. [2020-10-13 14:16:51,541 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:17:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:17:04,583 INFO L93 Difference]: Finished difference Result 106613 states and 145811 transitions. [2020-10-13 14:17:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 14:17:04,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-10-13 14:17:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:17:04,676 INFO L225 Difference]: With dead ends: 106613 [2020-10-13 14:17:04,676 INFO L226 Difference]: Without dead ends: 71163 [2020-10-13 14:17:04,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:17:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71163 states. [2020-10-13 14:17:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71163 to 36741. [2020-10-13 14:17:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36741 states. [2020-10-13 14:17:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36741 states to 36741 states and 50385 transitions. [2020-10-13 14:17:10,840 INFO L78 Accepts]: Start accepts. Automaton has 36741 states and 50385 transitions. Word has length 82 [2020-10-13 14:17:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:17:10,840 INFO L479 AbstractCegarLoop]: Abstraction has 36741 states and 50385 transitions. [2020-10-13 14:17:10,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:17:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 36741 states and 50385 transitions. [2020-10-13 14:17:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:17:10,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:17:10,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:17:10,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:17:10,842 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:17:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:17:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash -898137521, now seen corresponding path program 1 times [2020-10-13 14:17:10,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:17:10,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990550618] [2020-10-13 14:17:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:17:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:10,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:10,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:11,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:15,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:15,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:17:15,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:17:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:16,167 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2020-10-13 14:17:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:17:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:17:16,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:17:16,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:17:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:17:16,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:17:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:17:16,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990550618] [2020-10-13 14:17:16,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:17:16,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 14:17:16,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770129675] [2020-10-13 14:17:16,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:17:16,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:17:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:17:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:17:16,367 INFO L87 Difference]: Start difference. First operand 36741 states and 50385 transitions. Second operand 12 states. [2020-10-13 14:17:16,561 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127