/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:52:26,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:52:26,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:52:26,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:52:26,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:52:26,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:52:26,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:52:26,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:52:26,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:52:26,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:52:26,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:52:26,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:52:26,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:52:26,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:52:26,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:52:26,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:52:26,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:52:26,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:52:26,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:52:26,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:52:26,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:52:26,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:52:26,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:52:26,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:52:26,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:52:26,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:52:26,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:52:26,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:52:26,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:52:26,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:52:26,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:52:26,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:52:26,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:52:26,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:52:26,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:52:26,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:52:26,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:52:26,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:52:26,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:52:26,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:52:26,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:52:26,477 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 [2020-10-27 23:52:26,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:52:26,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:52:26,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:52:26,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:52:26,540 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:52:26,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:52:26,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:52:26,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:52:26,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:52:26,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:52:26,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:52:26,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:52:26,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:52:26,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:52:26,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:52:26,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:52:26,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:52:26,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:52:26,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:52:26,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:52:26,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:52:26,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:52:26,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:52:26,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:52:26,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:52:26,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:52:26,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:52:26,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:52:26,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:52:26,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:52:26,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:52:26,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:52:26,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:52:26,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:52:26,975 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:52:26,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:52:27,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0112240/95d7fd003eac4725ac3f0236b5d8baf7/FLAG412bf009b [2020-10-27 23:52:27,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:52:27,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:52:27,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0112240/95d7fd003eac4725ac3f0236b5d8baf7/FLAG412bf009b [2020-10-27 23:52:27,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a0112240/95d7fd003eac4725ac3f0236b5d8baf7 [2020-10-27 23:52:27,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:52:27,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:52:27,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:52:27,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:52:27,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:52:28,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:52:27" (1/1) ... [2020-10-27 23:52:28,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf944b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28, skipping insertion in model container [2020-10-27 23:52:28,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:52:27" (1/1) ... [2020-10-27 23:52:28,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:52:28,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:52:28,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:52:28,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:52:28,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:52:28,509 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:52:28,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28 WrapperNode [2020-10-27 23:52:28,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:52:28,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:52:28,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:52:28,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:52:28,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (1/1) ... [2020-10-27 23:52:28,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:52:28,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:52:28,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:52:28,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:52:28,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (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 [2020-10-27 23:52:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:52:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:52:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:52:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:52:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:52:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:52:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:52:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:52:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:52:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:52:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:52:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:52:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:52:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:52:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:52:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:52:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:52:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:52:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:52:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:52:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:52:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:52:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:52:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:52:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:52:28,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:52:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:52:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:52:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:52:29,463 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:52:29,463 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:52:29,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:52:29 BoogieIcfgContainer [2020-10-27 23:52:29,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:52:29,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:52:29,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:52:29,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:52:29,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:52:27" (1/3) ... [2020-10-27 23:52:29,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9cd2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:52:29, skipping insertion in model container [2020-10-27 23:52:29,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:52:28" (2/3) ... [2020-10-27 23:52:29,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9cd2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:52:29, skipping insertion in model container [2020-10-27 23:52:29,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:52:29" (3/3) ... [2020-10-27 23:52:29,474 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-27 23:52:29,487 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:52:29,493 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:52:29,506 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:52:29,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:52:29,535 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:52:29,535 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:52:29,536 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:52:29,536 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:52:29,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:52:29,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:52:29,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:52:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-10-27 23:52:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 23:52:29,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:29,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:29,569 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1924019343, now seen corresponding path program 1 times [2020-10-27 23:52:29,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:29,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030146156] [2020-10-27 23:52:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:30,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:30,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:31,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:33,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:34,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:34,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 23:52:34,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:52:34,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 23:52:34,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:52:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 23:52:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:52:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:52:35,372 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:52:35,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:35,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:35,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:35,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:35,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 23:52:35,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:35,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:35,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:35,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:35,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030146156] [2020-10-27 23:52:35,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:35,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:52:35,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539525168] [2020-10-27 23:52:35,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:52:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:35,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:52:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:52:35,515 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2020-10-27 23:52:35,885 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:52:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:36,556 INFO L93 Difference]: Finished difference Result 267 states and 431 transitions. [2020-10-27 23:52:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:52:36,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-27 23:52:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:36,571 INFO L225 Difference]: With dead ends: 267 [2020-10-27 23:52:36,571 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 23:52:36,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:52:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 23:52:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-27 23:52:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 23:52:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 255 transitions. [2020-10-27 23:52:36,646 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 255 transitions. Word has length 77 [2020-10-27 23:52:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:36,647 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 255 transitions. [2020-10-27 23:52:36,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:52:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 255 transitions. [2020-10-27 23:52:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 23:52:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:36,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:52:36,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1166381261, now seen corresponding path program 1 times [2020-10-27 23:52:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:36,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527050581] [2020-10-27 23:52:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:36,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:36,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:41,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:41,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 23:52:41,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:52:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:52:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:52:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:52:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:52:41,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:42,042 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:52:42,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:42,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:42,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:42,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:42,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:52:42,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:42,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527050581] [2020-10-27 23:52:42,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:42,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:52:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654585604] [2020-10-27 23:52:42,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:52:42,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:52:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:52:42,124 INFO L87 Difference]: Start difference. First operand 178 states and 255 transitions. Second operand 4 states. [2020-10-27 23:52:42,381 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:52:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:42,915 INFO L93 Difference]: Finished difference Result 424 states and 645 transitions. [2020-10-27 23:52:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:52:42,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-27 23:52:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:42,920 INFO L225 Difference]: With dead ends: 424 [2020-10-27 23:52:42,920 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 23:52:42,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:52:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 23:52:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2020-10-27 23:52:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 23:52:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 433 transitions. [2020-10-27 23:52:42,983 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 433 transitions. Word has length 78 [2020-10-27 23:52:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:42,984 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 433 transitions. [2020-10-27 23:52:42,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:52:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 433 transitions. [2020-10-27 23:52:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 23:52:42,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:42,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:42,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:52:42,991 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 147552819, now seen corresponding path program 1 times [2020-10-27 23:52:42,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:42,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34525979] [2020-10-27 23:52:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:43,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:43,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:43,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:43,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:48,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 23:52:48,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:52:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:52:48,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:52:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:52:48,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:52:48,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:48,335 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:52:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:48,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:48,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:48,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34525979] [2020-10-27 23:52:48,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:48,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:52:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828992828] [2020-10-27 23:52:48,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:52:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:52:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:52:48,384 INFO L87 Difference]: Start difference. First operand 290 states and 433 transitions. Second operand 4 states. [2020-10-27 23:52:48,660 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:52:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:49,238 INFO L93 Difference]: Finished difference Result 744 states and 1153 transitions. [2020-10-27 23:52:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:52:49,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 23:52:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:49,249 INFO L225 Difference]: With dead ends: 744 [2020-10-27 23:52:49,249 INFO L226 Difference]: Without dead ends: 501 [2020-10-27 23:52:49,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:52:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-27 23:52:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 498. [2020-10-27 23:52:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 23:52:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 761 transitions. [2020-10-27 23:52:49,297 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 761 transitions. Word has length 79 [2020-10-27 23:52:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:49,298 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 761 transitions. [2020-10-27 23:52:49,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:52:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 761 transitions. [2020-10-27 23:52:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 23:52:49,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:49,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:49,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:52:49,300 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1632028069, now seen corresponding path program 1 times [2020-10-27 23:52:49,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:49,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590018532] [2020-10-27 23:52:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:54,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:54,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 23:52:54,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:52:54,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:52:54,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:52:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:52:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:52:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:52:54,593 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:52:54,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:52:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:54,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:52:54,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:52:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:52:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:52:54,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:52:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:52:54,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590018532] [2020-10-27 23:52:54,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:52:54,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:52:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118453001] [2020-10-27 23:52:54,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:52:54,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:52:54,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:52:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:52:54,666 INFO L87 Difference]: Start difference. First operand 498 states and 761 transitions. Second operand 4 states. [2020-10-27 23:52:54,932 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:52:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:52:55,545 INFO L93 Difference]: Finished difference Result 1336 states and 2085 transitions. [2020-10-27 23:52:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:52:55,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 23:52:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:52:55,554 INFO L225 Difference]: With dead ends: 1336 [2020-10-27 23:52:55,554 INFO L226 Difference]: Without dead ends: 885 [2020-10-27 23:52:55,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:52:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-10-27 23:52:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 882. [2020-10-27 23:52:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-10-27 23:52:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1361 transitions. [2020-10-27 23:52:55,626 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1361 transitions. Word has length 80 [2020-10-27 23:52:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:52:55,628 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1361 transitions. [2020-10-27 23:52:55,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:52:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1361 transitions. [2020-10-27 23:52:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:52:55,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:52:55,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:52:55,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:52:55,635 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:52:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:52:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash -729803187, now seen corresponding path program 1 times [2020-10-27 23:52:55,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:52:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237373315] [2020-10-27 23:52:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:52:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:52:55,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:55,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:55,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:52:58,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:00,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:00,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:53:00,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 23:53:00,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:00,957 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:00,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:00,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237373315] [2020-10-27 23:53:01,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:01,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:53:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267367801] [2020-10-27 23:53:01,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:53:01,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:53:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:53:01,021 INFO L87 Difference]: Start difference. First operand 882 states and 1361 transitions. Second operand 7 states. [2020-10-27 23:53:01,276 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:01,908 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:53:02,151 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:02,683 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:53:02,916 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:53:03,393 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:53:03,600 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:04,037 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:53:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:04,126 INFO L93 Difference]: Finished difference Result 7538 states and 11825 transitions. [2020-10-27 23:53:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:53:04,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-27 23:53:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:04,166 INFO L225 Difference]: With dead ends: 7538 [2020-10-27 23:53:04,166 INFO L226 Difference]: Without dead ends: 6703 [2020-10-27 23:53:04,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:53:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2020-10-27 23:53:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 2530. [2020-10-27 23:53:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2530 states. [2020-10-27 23:53:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3945 transitions. [2020-10-27 23:53:04,383 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3945 transitions. Word has length 81 [2020-10-27 23:53:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:04,385 INFO L481 AbstractCegarLoop]: Abstraction has 2530 states and 3945 transitions. [2020-10-27 23:53:04,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:53:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3945 transitions. [2020-10-27 23:53:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 23:53:04,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:04,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:04,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:53:04,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1998174862, now seen corresponding path program 1 times [2020-10-27 23:53:04,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:04,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935480901] [2020-10-27 23:53:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:04,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:04,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:04,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:05,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:07,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 23:53:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:53:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2632 [2020-10-27 23:53:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:53:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:53:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:53:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:07,303 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:07,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:07,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:07,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935480901] [2020-10-27 23:53:07,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:07,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:53:07,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60434237] [2020-10-27 23:53:07,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:53:07,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:53:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:53:07,347 INFO L87 Difference]: Start difference. First operand 2530 states and 3945 transitions. Second operand 4 states. [2020-10-27 23:53:07,587 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:08,337 INFO L93 Difference]: Finished difference Result 7112 states and 11117 transitions. [2020-10-27 23:53:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:53:08,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 23:53:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:08,362 INFO L225 Difference]: With dead ends: 7112 [2020-10-27 23:53:08,362 INFO L226 Difference]: Without dead ends: 4629 [2020-10-27 23:53:08,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:53:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2020-10-27 23:53:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4626. [2020-10-27 23:53:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4626 states. [2020-10-27 23:53:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7169 transitions. [2020-10-27 23:53:08,637 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7169 transitions. Word has length 81 [2020-10-27 23:53:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:08,638 INFO L481 AbstractCegarLoop]: Abstraction has 4626 states and 7169 transitions. [2020-10-27 23:53:08,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:53:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7169 transitions. [2020-10-27 23:53:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 23:53:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:08,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:08,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:53:08,639 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1541958448, now seen corresponding path program 1 times [2020-10-27 23:53:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:08,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528793514] [2020-10-27 23:53:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:08,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:10,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:53:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:53:10,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:10,333 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:10,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:10,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:10,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:10,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:10,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:10,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528793514] [2020-10-27 23:53:10,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:10,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:53:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250210765] [2020-10-27 23:53:10,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:53:10,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:53:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:53:10,372 INFO L87 Difference]: Start difference. First operand 4626 states and 7169 transitions. Second operand 4 states. [2020-10-27 23:53:10,629 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:11,638 INFO L93 Difference]: Finished difference Result 13016 states and 20165 transitions. [2020-10-27 23:53:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:53:11,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 23:53:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:11,681 INFO L225 Difference]: With dead ends: 13016 [2020-10-27 23:53:11,681 INFO L226 Difference]: Without dead ends: 8437 [2020-10-27 23:53:11,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:53:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8437 states. [2020-10-27 23:53:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8437 to 8434. [2020-10-27 23:53:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8434 states. [2020-10-27 23:53:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 12945 transitions. [2020-10-27 23:53:12,279 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 12945 transitions. Word has length 82 [2020-10-27 23:53:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:12,280 INFO L481 AbstractCegarLoop]: Abstraction has 8434 states and 12945 transitions. [2020-10-27 23:53:12,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:53:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 12945 transitions. [2020-10-27 23:53:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:53:12,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:12,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:12,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:53:12,281 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash 587287780, now seen corresponding path program 1 times [2020-10-27 23:53:12,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:12,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120676383] [2020-10-27 23:53:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:15,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:15,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:53:15,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:53:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3088 [2020-10-27 23:53:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:53:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:53:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 23:53:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:15,663 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:15,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:15,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:15,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:15,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:15,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120676383] [2020-10-27 23:53:15,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:15,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:53:15,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551169917] [2020-10-27 23:53:15,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:53:15,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:53:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:53:15,703 INFO L87 Difference]: Start difference. First operand 8434 states and 12945 transitions. Second operand 7 states. [2020-10-27 23:53:15,962 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:16,573 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:53:16,819 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:17,624 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:53:17,854 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:53:19,373 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:19,622 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:53:20,415 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:53:20,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:20,569 INFO L93 Difference]: Finished difference Result 58649 states and 90037 transitions. [2020-10-27 23:53:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:53:20,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:53:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:20,723 INFO L225 Difference]: With dead ends: 58649 [2020-10-27 23:53:20,724 INFO L226 Difference]: Without dead ends: 53046 [2020-10-27 23:53:20,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:53:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53046 states. [2020-10-27 23:53:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53046 to 16737. [2020-10-27 23:53:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16737 states. [2020-10-27 23:53:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16737 states to 16737 states and 25573 transitions. [2020-10-27 23:53:22,226 INFO L78 Accepts]: Start accepts. Automaton has 16737 states and 25573 transitions. Word has length 83 [2020-10-27 23:53:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:22,227 INFO L481 AbstractCegarLoop]: Abstraction has 16737 states and 25573 transitions. [2020-10-27 23:53:22,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:53:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16737 states and 25573 transitions. [2020-10-27 23:53:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:53:22,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:22,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:22,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:53:22,228 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -580885852, now seen corresponding path program 1 times [2020-10-27 23:53:22,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:22,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772986289] [2020-10-27 23:53:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:25,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3013 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:53:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:53:25,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:25,527 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:25,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:25,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:25,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:25,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:25,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772986289] [2020-10-27 23:53:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:25,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:53:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019045068] [2020-10-27 23:53:25,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:53:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:53:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:53:25,585 INFO L87 Difference]: Start difference. First operand 16737 states and 25573 transitions. Second operand 7 states. [2020-10-27 23:53:25,854 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:26,446 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:53:26,688 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:27,463 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:53:27,699 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 23:53:29,216 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:29,448 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:53:30,298 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:53:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:30,660 INFO L93 Difference]: Finished difference Result 67780 states and 103426 transitions. [2020-10-27 23:53:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:53:30,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-27 23:53:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:30,786 INFO L225 Difference]: With dead ends: 67780 [2020-10-27 23:53:30,787 INFO L226 Difference]: Without dead ends: 56641 [2020-10-27 23:53:30,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:53:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56641 states. [2020-10-27 23:53:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56641 to 22273. [2020-10-27 23:53:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22273 states. [2020-10-27 23:53:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22273 states to 22273 states and 34053 transitions. [2020-10-27 23:53:32,551 INFO L78 Accepts]: Start accepts. Automaton has 22273 states and 34053 transitions. Word has length 83 [2020-10-27 23:53:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:32,552 INFO L481 AbstractCegarLoop]: Abstraction has 22273 states and 34053 transitions. [2020-10-27 23:53:32,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:53:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 22273 states and 34053 transitions. [2020-10-27 23:53:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 23:53:32,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:32,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:32,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:53:32,553 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1849257527, now seen corresponding path program 1 times [2020-10-27 23:53:32,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:32,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131464776] [2020-10-27 23:53:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:32,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:33,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 23:53:33,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:33,749 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:53:33,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:53:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:53:33,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:53:33,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:53:33,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:53:33,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:53:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:53:33,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131464776] [2020-10-27 23:53:33,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:53:33,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:53:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170184483] [2020-10-27 23:53:33,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:53:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:53:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:53:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:53:33,790 INFO L87 Difference]: Start difference. First operand 22273 states and 34053 transitions. Second operand 9 states. [2020-10-27 23:53:34,082 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:53:36,195 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:53:36,450 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:36,734 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:53:36,994 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:53:37,251 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:53:38,274 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:53:38,574 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:53:38,882 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:53:39,211 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 23:53:39,525 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:53:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:53:52,755 INFO L93 Difference]: Finished difference Result 288805 states and 441885 transitions. [2020-10-27 23:53:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:53:52,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-27 23:53:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:53:53,551 INFO L225 Difference]: With dead ends: 288805 [2020-10-27 23:53:53,551 INFO L226 Difference]: Without dead ends: 266594 [2020-10-27 23:53:53,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:53:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266594 states. [2020-10-27 23:53:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266594 to 44481. [2020-10-27 23:53:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44481 states. [2020-10-27 23:53:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44481 states to 44481 states and 67013 transitions. [2020-10-27 23:53:59,650 INFO L78 Accepts]: Start accepts. Automaton has 44481 states and 67013 transitions. Word has length 83 [2020-10-27 23:53:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:53:59,650 INFO L481 AbstractCegarLoop]: Abstraction has 44481 states and 67013 transitions. [2020-10-27 23:53:59,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:53:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 44481 states and 67013 transitions. [2020-10-27 23:53:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:53:59,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:53:59,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:53:59,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:53:59,652 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:53:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:53:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash -945849426, now seen corresponding path program 1 times [2020-10-27 23:53:59,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:53:59,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439482838] [2020-10-27 23:53:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:53:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:53:59,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:53:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:00,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:54:00,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:54:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-27 23:54:00,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:54:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:54:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:54:00,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:00,675 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:00,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:00,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:00,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:00,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439482838] [2020-10-27 23:54:00,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:00,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:54:00,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485394881] [2020-10-27 23:54:00,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:54:00,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:54:00,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:54:00,716 INFO L87 Difference]: Start difference. First operand 44481 states and 67013 transitions. Second operand 5 states. [2020-10-27 23:54:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:08,416 INFO L93 Difference]: Finished difference Result 90948 states and 136007 transitions. [2020-10-27 23:54:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:54:08,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-27 23:54:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:08,508 INFO L225 Difference]: With dead ends: 90948 [2020-10-27 23:54:08,508 INFO L226 Difference]: Without dead ends: 90945 [2020-10-27 23:54:08,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:54:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90945 states. [2020-10-27 23:54:13,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90945 to 46529. [2020-10-27 23:54:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46529 states. [2020-10-27 23:54:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46529 states to 46529 states and 69061 transitions. [2020-10-27 23:54:13,315 INFO L78 Accepts]: Start accepts. Automaton has 46529 states and 69061 transitions. Word has length 85 [2020-10-27 23:54:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:13,316 INFO L481 AbstractCegarLoop]: Abstraction has 46529 states and 69061 transitions. [2020-10-27 23:54:13,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:54:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46529 states and 69061 transitions. [2020-10-27 23:54:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 23:54:13,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:13,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:13,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:54:13,317 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:13,318 INFO L82 PathProgramCache]: Analyzing trace with hash -324319793, now seen corresponding path program 1 times [2020-10-27 23:54:13,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:13,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324029189] [2020-10-27 23:54:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:13,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:14,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:54:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 23:54:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:14,395 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324029189] [2020-10-27 23:54:14,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:14,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:54:14,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944444373] [2020-10-27 23:54:14,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:54:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:54:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:54:14,439 INFO L87 Difference]: Start difference. First operand 46529 states and 69061 transitions. Second operand 9 states. [2020-10-27 23:54:14,935 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 23:54:17,569 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:54:17,968 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:54:18,285 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:54:18,577 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:54:18,854 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:54:20,694 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:54:21,057 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:54:21,362 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:54:21,679 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 23:54:21,972 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 23:54:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:54:44,561 INFO L93 Difference]: Finished difference Result 325349 states and 483037 transitions. [2020-10-27 23:54:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 23:54:44,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-27 23:54:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:54:45,026 INFO L225 Difference]: With dead ends: 325349 [2020-10-27 23:54:45,027 INFO L226 Difference]: Without dead ends: 278882 [2020-10-27 23:54:45,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:54:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278882 states. [2020-10-27 23:54:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278882 to 46529. [2020-10-27 23:54:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46529 states. [2020-10-27 23:54:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46529 states to 46529 states and 68549 transitions. [2020-10-27 23:54:52,400 INFO L78 Accepts]: Start accepts. Automaton has 46529 states and 68549 transitions. Word has length 85 [2020-10-27 23:54:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:54:52,400 INFO L481 AbstractCegarLoop]: Abstraction has 46529 states and 68549 transitions. [2020-10-27 23:54:52,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:54:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46529 states and 68549 transitions. [2020-10-27 23:54:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 23:54:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:52,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:54:52,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:54:52,401 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1041442579, now seen corresponding path program 1 times [2020-10-27 23:54:52,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:52,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434156304] [2020-10-27 23:54:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:52,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 23:54:52,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 23:54:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:53,083 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:54:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:53,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:53,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:54:53,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:54:53,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434156304] [2020-10-27 23:54:53,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:53,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:54:53,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707121750] [2020-10-27 23:54:53,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:54:53,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:54:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:54:53,116 INFO L87 Difference]: Start difference. First operand 46529 states and 68549 transitions. Second operand 4 states. [2020-10-27 23:54:53,356 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:55:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:01,863 INFO L93 Difference]: Finished difference Result 114439 states and 168713 transitions. [2020-10-27 23:55:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:55:01,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-27 23:55:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:01,937 INFO L225 Difference]: With dead ends: 114439 [2020-10-27 23:55:01,938 INFO L226 Difference]: Without dead ends: 67972 [2020-10-27 23:55:01,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:55:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67972 states. [2020-10-27 23:55:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67972 to 67969. [2020-10-27 23:55:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67969 states. [2020-10-27 23:55:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67969 states to 67969 states and 99461 transitions. [2020-10-27 23:55:10,138 INFO L78 Accepts]: Start accepts. Automaton has 67969 states and 99461 transitions. Word has length 86 [2020-10-27 23:55:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:10,138 INFO L481 AbstractCegarLoop]: Abstraction has 67969 states and 99461 transitions. [2020-10-27 23:55:10,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:55:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 67969 states and 99461 transitions. [2020-10-27 23:55:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 23:55:10,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:10,163 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:55:10,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:55:10,163 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 995352366, now seen corresponding path program 1 times [2020-10-27 23:55:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141708704] [2020-10-27 23:55:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:13,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:14,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:14,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:15,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:55:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:55:15,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 23:55:15,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:15,524 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:55:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:55:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141708704] [2020-10-27 23:55:15,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:55:15,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 23:55:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726392236] [2020-10-27 23:55:15,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:55:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:55:15,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:55:15,585 INFO L87 Difference]: Start difference. First operand 67969 states and 99461 transitions. Second operand 9 states. [2020-10-27 23:55:15,905 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 23:55:18,815 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 23:55:19,091 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 23:55:19,342 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 23:55:19,604 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 23:55:20,726 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 23:55:21,001 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:55:21,278 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 23:55:21,542 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 23:55:21,804 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 188