/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-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:22:17,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:22:17,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:22:17,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:22:17,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:22:17,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:22:17,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:22:17,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:22:17,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:22:17,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:22:17,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:22:17,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:22:17,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:22:17,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:22:17,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:22:17,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:22:17,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:22:17,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:22:17,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:22:17,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:22:17,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:22:17,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:22:17,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:22:17,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:22:17,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:22:17,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:22:17,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:22:17,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:22:17,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:22:17,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:22:17,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:22:17,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:22:17,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:22:17,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:22:17,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:22:17,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:22:17,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:22:17,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:22:17,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:22:17,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:22:17,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:22:17,461 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 [2020-10-28 00:22:17,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:22:17,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:22:17,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:22:17,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:22:17,512 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:22:17,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:22:17,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:22:17,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:22:17,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:22:17,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:22:17,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:22:17,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:22:17,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:22:17,515 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:22:17,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:22:17,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:22:17,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:22:17,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:22:17,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:22:17,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:22:17,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:22:17,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:22:17,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:22:17,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:22:17,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:22:17,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:22:17,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:22:17,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:22:17,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:22:17,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:22:17,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:22:17,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:22:17,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:22:17,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:22:17,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:22:17,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 00:22:18,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c2293ec/6d632353adbe411db5f351f3deb6460d/FLAG9ff9e85af [2020-10-28 00:22:18,760 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:22:18,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 00:22:18,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c2293ec/6d632353adbe411db5f351f3deb6460d/FLAG9ff9e85af [2020-10-28 00:22:19,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97c2293ec/6d632353adbe411db5f351f3deb6460d [2020-10-28 00:22:19,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:22:19,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:22:19,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:22:19,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:22:19,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:22:19,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e11534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19, skipping insertion in model container [2020-10-28 00:22:19,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:22:19,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:22:19,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:22:19,500 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:22:19,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:22:19,727 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:22:19,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19 WrapperNode [2020-10-28 00:22:19,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:22:19,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:22:19,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:22:19,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:22:19,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... [2020-10-28 00:22:19,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:22:19,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:22:19,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:22:19,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:22:19,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:22:19,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:22:19,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:22:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:22:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:22:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:22:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:22:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:22:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:22:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:22:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:22:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:22:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:22:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:22:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:22:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:22:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:22:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:22:19,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:22:19,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:22:20,998 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:22:20,998 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:22:21,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:21 BoogieIcfgContainer [2020-10-28 00:22:21,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:22:21,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:22:21,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:22:21,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:22:21,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:22:19" (1/3) ... [2020-10-28 00:22:21,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a61b3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:21, skipping insertion in model container [2020-10-28 00:22:21,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:19" (2/3) ... [2020-10-28 00:22:21,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a61b3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:21, skipping insertion in model container [2020-10-28 00:22:21,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:21" (3/3) ... [2020-10-28 00:22:21,010 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 00:22:21,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:22:21,027 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:22:21,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:22:21,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:22:21,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:22:21,071 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:22:21,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:22:21,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:22:21,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:22:21,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:22:21,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:22:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-28 00:22:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 00:22:21,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:21,106 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] [2020-10-28 00:22:21,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1049231677, now seen corresponding path program 1 times [2020-10-28 00:22:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:21,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150895613] [2020-10-28 00:22:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:21,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:22,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:26,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:26,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 00:22:26,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:22:26,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:22:26,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:26,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:26,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 00:22:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:22:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:22:27,190 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:27,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:27,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:27,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:27,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:27,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:22:27,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:27,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150895613] [2020-10-28 00:22:27,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:27,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:27,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186466613] [2020-10-28 00:22:27,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:27,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:27,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:27,286 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 4 states. [2020-10-28 00:22:27,754 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:28,741 INFO L93 Difference]: Finished difference Result 383 states and 618 transitions. [2020-10-28 00:22:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:28,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 00:22:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:28,758 INFO L225 Difference]: With dead ends: 383 [2020-10-28 00:22:28,758 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 00:22:28,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 00:22:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-10-28 00:22:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-28 00:22:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2020-10-28 00:22:28,850 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 78 [2020-10-28 00:22:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:28,851 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2020-10-28 00:22:28,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2020-10-28 00:22:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 00:22:28,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:28,856 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] [2020-10-28 00:22:28,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:22:28,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:28,858 INFO L82 PathProgramCache]: Analyzing trace with hash 565765915, now seen corresponding path program 1 times [2020-10-28 00:22:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:28,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331899960] [2020-10-28 00:22:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:28,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:29,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:33,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:33,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 00:22:33,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:22:33,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4488 [2020-10-28 00:22:33,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:22:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:22:33,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:33,711 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:33,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:33,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:33,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:33,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:33,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:22:33,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:33,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:33,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:33,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331899960] [2020-10-28 00:22:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:33,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:33,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859518516] [2020-10-28 00:22:33,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:33,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:33,787 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand 4 states. [2020-10-28 00:22:34,086 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:34,934 INFO L93 Difference]: Finished difference Result 631 states and 977 transitions. [2020-10-28 00:22:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:34,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 00:22:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:34,949 INFO L225 Difference]: With dead ends: 631 [2020-10-28 00:22:34,949 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 00:22:34,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 00:22:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 423. [2020-10-28 00:22:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-28 00:22:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 646 transitions. [2020-10-28 00:22:34,999 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 646 transitions. Word has length 79 [2020-10-28 00:22:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:34,999 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 646 transitions. [2020-10-28 00:22:34,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 646 transitions. [2020-10-28 00:22:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 00:22:35,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:35,003 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] [2020-10-28 00:22:35,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:22:35,003 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:35,004 INFO L82 PathProgramCache]: Analyzing trace with hash -245189990, now seen corresponding path program 1 times [2020-10-28 00:22:35,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:35,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571040736] [2020-10-28 00:22:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:35,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:35,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:37,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:37,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 00:22:37,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:22:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-28 00:22:37,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:37,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:22:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:22:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:37,465 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:37,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:37,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:37,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:37,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:37,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:37,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:22:37,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:37,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:37,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:37,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571040736] [2020-10-28 00:22:37,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:37,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:37,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689205248] [2020-10-28 00:22:37,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:37,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:37,528 INFO L87 Difference]: Start difference. First operand 423 states and 646 transitions. Second operand 4 states. [2020-10-28 00:22:37,837 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:38,633 INFO L93 Difference]: Finished difference Result 1109 states and 1738 transitions. [2020-10-28 00:22:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:38,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 00:22:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:38,639 INFO L225 Difference]: With dead ends: 1109 [2020-10-28 00:22:38,639 INFO L226 Difference]: Without dead ends: 734 [2020-10-28 00:22:38,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-28 00:22:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 731. [2020-10-28 00:22:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-28 00:22:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1134 transitions. [2020-10-28 00:22:38,705 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1134 transitions. Word has length 80 [2020-10-28 00:22:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:38,707 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1134 transitions. [2020-10-28 00:22:38,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1134 transitions. [2020-10-28 00:22:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:22:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:38,721 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] [2020-10-28 00:22:38,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:22:38,721 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1203895130, now seen corresponding path program 1 times [2020-10-28 00:22:38,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:38,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23962670] [2020-10-28 00:22:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:38,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:38,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:39,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:39,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:22:39,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:22:39,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-28 00:22:39,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:22:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:22:39,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 00:22:40,106 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:40,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:40,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:40,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 00:22:40,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:40,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:40,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23962670] [2020-10-28 00:22:40,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:40,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390471493] [2020-10-28 00:22:40,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:40,204 INFO L87 Difference]: Start difference. First operand 731 states and 1134 transitions. Second operand 4 states. [2020-10-28 00:22:40,502 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:41,515 INFO L93 Difference]: Finished difference Result 1969 states and 3098 transitions. [2020-10-28 00:22:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:41,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:22:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:41,527 INFO L225 Difference]: With dead ends: 1969 [2020-10-28 00:22:41,527 INFO L226 Difference]: Without dead ends: 1286 [2020-10-28 00:22:41,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-28 00:22:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-28 00:22:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-28 00:22:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2002 transitions. [2020-10-28 00:22:41,630 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2002 transitions. Word has length 81 [2020-10-28 00:22:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:41,633 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2002 transitions. [2020-10-28 00:22:41,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2002 transitions. [2020-10-28 00:22:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:22:41,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:41,637 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] [2020-10-28 00:22:41,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:22:41,637 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1174569093, now seen corresponding path program 1 times [2020-10-28 00:22:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793847960] [2020-10-28 00:22:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:41,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:42,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:42,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:22:42,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-28 00:22:42,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:22:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:22:42,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:42,659 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:42,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:42,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:42,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:42,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:42,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:42,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:42,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793847960] [2020-10-28 00:22:42,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:42,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:42,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594554087] [2020-10-28 00:22:42,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:42,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:42,717 INFO L87 Difference]: Start difference. First operand 1283 states and 2002 transitions. Second operand 4 states. [2020-10-28 00:22:43,123 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:44,194 INFO L93 Difference]: Finished difference Result 3497 states and 5494 transitions. [2020-10-28 00:22:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:44,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:22:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:44,208 INFO L225 Difference]: With dead ends: 3497 [2020-10-28 00:22:44,209 INFO L226 Difference]: Without dead ends: 2262 [2020-10-28 00:22:44,213 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 [2020-10-28 00:22:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2020-10-28 00:22:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2259. [2020-10-28 00:22:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2020-10-28 00:22:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3522 transitions. [2020-10-28 00:22:44,355 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3522 transitions. Word has length 82 [2020-10-28 00:22:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:44,356 INFO L481 AbstractCegarLoop]: Abstraction has 2259 states and 3522 transitions. [2020-10-28 00:22:44,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3522 transitions. [2020-10-28 00:22:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:22:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:44,357 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] [2020-10-28 00:22:44,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:22:44,358 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1623994629, now seen corresponding path program 1 times [2020-10-28 00:22:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:44,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938651091] [2020-10-28 00:22:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:46,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:46,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:22:46,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:46,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-10-28 00:22:46,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:22:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:22:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 00:22:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 00:22:46,734 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:46,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:46,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:46,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:46,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:46,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938651091] [2020-10-28 00:22:46,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:46,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:22:46,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115724048] [2020-10-28 00:22:46,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:22:46,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:22:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:22:46,794 INFO L87 Difference]: Start difference. First operand 2259 states and 3522 transitions. Second operand 9 states. [2020-10-28 00:22:47,141 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:22:48,492 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:22:48,804 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:22:49,129 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:22:49,434 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:22:49,730 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:22:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:50,376 INFO L93 Difference]: Finished difference Result 17736 states and 27840 transitions. [2020-10-28 00:22:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:22:50,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-28 00:22:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:50,475 INFO L225 Difference]: With dead ends: 17736 [2020-10-28 00:22:50,475 INFO L226 Difference]: Without dead ends: 15525 [2020-10-28 00:22:50,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:22:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15525 states. [2020-10-28 00:22:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15525 to 4467. [2020-10-28 00:22:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-10-28 00:22:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6930 transitions. [2020-10-28 00:22:50,955 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6930 transitions. Word has length 83 [2020-10-28 00:22:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:50,956 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6930 transitions. [2020-10-28 00:22:50,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:22:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6930 transitions. [2020-10-28 00:22:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:22:50,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:50,957 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] [2020-10-28 00:22:50,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:22:50,958 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1770630148, now seen corresponding path program 1 times [2020-10-28 00:22:50,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:50,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827341942] [2020-10-28 00:22:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:52,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:52,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:22:52,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:52,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-10-28 00:22:52,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:52,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:22:52,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 00:22:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:22:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:52,416 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:52,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:52,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:52,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:52,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:52,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827341942] [2020-10-28 00:22:52,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:52,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:22:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163444892] [2020-10-28 00:22:52,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:22:52,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:52,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:22:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:52,464 INFO L87 Difference]: Start difference. First operand 4467 states and 6930 transitions. Second operand 5 states. [2020-10-28 00:22:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:54,057 INFO L93 Difference]: Finished difference Result 9014 states and 13940 transitions. [2020-10-28 00:22:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:22:54,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 00:22:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:54,103 INFO L225 Difference]: With dead ends: 9014 [2020-10-28 00:22:54,103 INFO L226 Difference]: Without dead ends: 9011 [2020-10-28 00:22:54,109 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 [2020-10-28 00:22:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9011 states. [2020-10-28 00:22:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9011 to 4595. [2020-10-28 00:22:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4595 states. [2020-10-28 00:22:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7058 transitions. [2020-10-28 00:22:54,585 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7058 transitions. Word has length 84 [2020-10-28 00:22:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:54,585 INFO L481 AbstractCegarLoop]: Abstraction has 4595 states and 7058 transitions. [2020-10-28 00:22:54,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:22:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7058 transitions. [2020-10-28 00:22:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:22:54,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:54,587 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] [2020-10-28 00:22:54,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:22:54,587 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1242911510, now seen corresponding path program 1 times [2020-10-28 00:22:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:54,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358833560] [2020-10-28 00:22:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:54,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:54,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:55,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:55,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:22:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 00:22:55,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:55,936 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:22:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:55,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:55,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:55,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:55,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:56,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358833560] [2020-10-28 00:22:56,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:56,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:22:56,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485223723] [2020-10-28 00:22:56,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:22:56,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:22:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:22:56,032 INFO L87 Difference]: Start difference. First operand 4595 states and 7058 transitions. Second operand 9 states. [2020-10-28 00:22:57,373 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:22:57,791 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:22:58,101 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 00:22:58,420 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:22:58,726 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:22:59,094 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:02,250 INFO L93 Difference]: Finished difference Result 28197 states and 43038 transitions. [2020-10-28 00:23:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:23:02,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-28 00:23:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:02,330 INFO L225 Difference]: With dead ends: 28197 [2020-10-28 00:23:02,331 INFO L226 Difference]: Without dead ends: 23650 [2020-10-28 00:23:02,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 00:23:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23650 states. [2020-10-28 00:23:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23650 to 23635. [2020-10-28 00:23:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23635 states. [2020-10-28 00:23:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23635 states to 23635 states and 35954 transitions. [2020-10-28 00:23:04,795 INFO L78 Accepts]: Start accepts. Automaton has 23635 states and 35954 transitions. Word has length 85 [2020-10-28 00:23:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:04,795 INFO L481 AbstractCegarLoop]: Abstraction has 23635 states and 35954 transitions. [2020-10-28 00:23:04,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:23:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23635 states and 35954 transitions. [2020-10-28 00:23:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:23:04,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:04,798 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] [2020-10-28 00:23:04,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:23:04,798 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1775503723, now seen corresponding path program 1 times [2020-10-28 00:23:04,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:04,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71515911] [2020-10-28 00:23:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:04,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:05,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:05,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:23:05,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:23:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-28 00:23:05,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:23:05,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 00:23:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:05,504 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:23:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:05,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:05,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:05,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:05,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71515911] [2020-10-28 00:23:05,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:05,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631460978] [2020-10-28 00:23:05,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:05,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:05,558 INFO L87 Difference]: Start difference. First operand 23635 states and 35954 transitions. Second operand 4 states. [2020-10-28 00:23:05,868 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:23:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:09,833 INFO L93 Difference]: Finished difference Result 66585 states and 100854 transitions. [2020-10-28 00:23:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:09,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-28 00:23:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:09,948 INFO L225 Difference]: With dead ends: 66585 [2020-10-28 00:23:09,948 INFO L226 Difference]: Without dead ends: 42998 [2020-10-28 00:23:10,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42998 states. [2020-10-28 00:23:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42998 to 42995. [2020-10-28 00:23:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42995 states. [2020-10-28 00:23:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42995 states to 42995 states and 64562 transitions. [2020-10-28 00:23:13,784 INFO L78 Accepts]: Start accepts. Automaton has 42995 states and 64562 transitions. Word has length 85 [2020-10-28 00:23:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:13,785 INFO L481 AbstractCegarLoop]: Abstraction has 42995 states and 64562 transitions. [2020-10-28 00:23:13,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 42995 states and 64562 transitions. [2020-10-28 00:23:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 00:23:13,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:13,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:13,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:23:13,786 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1820205697, now seen corresponding path program 1 times [2020-10-28 00:23:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:13,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459527525] [2020-10-28 00:23:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:13,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:14,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:14,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 00:23:14,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:23:14,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-28 00:23:14,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:14,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:23:14,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 00:23:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:14,663 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:23:14,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:14,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:14,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:14,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:14,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459527525] [2020-10-28 00:23:14,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:14,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050108722] [2020-10-28 00:23:14,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:14,717 INFO L87 Difference]: Start difference. First operand 42995 states and 64562 transitions. Second operand 4 states. [2020-10-28 00:23:15,155 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:23:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:19,986 INFO L93 Difference]: Finished difference Result 105243 states and 157992 transitions. [2020-10-28 00:23:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:19,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-28 00:23:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:20,150 INFO L225 Difference]: With dead ends: 105243 [2020-10-28 00:23:20,150 INFO L226 Difference]: Without dead ends: 62296 [2020-10-28 00:23:20,220 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 [2020-10-28 00:23:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62296 states. [2020-10-28 00:23:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62296 to 62293. [2020-10-28 00:23:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62293 states. [2020-10-28 00:23:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62293 states to 62293 states and 93124 transitions. [2020-10-28 00:23:25,095 INFO L78 Accepts]: Start accepts. Automaton has 62293 states and 93124 transitions. Word has length 87 [2020-10-28 00:23:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:25,095 INFO L481 AbstractCegarLoop]: Abstraction has 62293 states and 93124 transitions. [2020-10-28 00:23:25,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62293 states and 93124 transitions. [2020-10-28 00:23:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 00:23:25,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:25,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:25,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:23:25,129 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2068377552, now seen corresponding path program 1 times [2020-10-28 00:23:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247181886] [2020-10-28 00:23:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:25,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:25,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 00:23:25,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:23:25,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-28 00:23:25,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:23:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:23:25,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-28 00:23:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:26,374 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:23:26,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:26,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:26,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:26,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:26,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:23:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247181886] [2020-10-28 00:23:26,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:23:26,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:23:26,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825418392] [2020-10-28 00:23:26,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:23:26,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:26,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:23:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:26,465 INFO L87 Difference]: Start difference. First operand 62293 states and 93124 transitions. Second operand 5 states. [2020-10-28 00:23:26,745 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:23:28,782 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:23:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:34,459 INFO L93 Difference]: Finished difference Result 146526 states and 219594 transitions. [2020-10-28 00:23:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:23:34,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-28 00:23:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:34,684 INFO L225 Difference]: With dead ends: 146526 [2020-10-28 00:23:34,684 INFO L226 Difference]: Without dead ends: 103579 [2020-10-28 00:23:35,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:23:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103579 states. [2020-10-28 00:23:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103579 to 103573. [2020-10-28 00:23:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103573 states. [2020-10-28 00:23:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103573 states to 103573 states and 154308 transitions. [2020-10-28 00:23:42,590 INFO L78 Accepts]: Start accepts. Automaton has 103573 states and 154308 transitions. Word has length 116 [2020-10-28 00:23:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:42,591 INFO L481 AbstractCegarLoop]: Abstraction has 103573 states and 154308 transitions. [2020-10-28 00:23:42,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:23:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 103573 states and 154308 transitions. [2020-10-28 00:23:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:23:42,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:42,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:42,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:23:42,622 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash 49008083, now seen corresponding path program 1 times [2020-10-28 00:23:42,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:42,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165959294] [2020-10-28 00:23:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:42,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:42,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:43,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:43,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:47,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:23:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:23:47,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:48,068 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:23:48,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:48,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:48,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:48,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:48,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:23:48,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:48,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165959294] [2020-10-28 00:23:48,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:48,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:48,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772415781] [2020-10-28 00:23:48,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:48,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:48,166 INFO L87 Difference]: Start difference. First operand 103573 states and 154308 transitions. Second operand 4 states. [2020-10-28 00:23:51,456 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:54,490 INFO L93 Difference]: Finished difference Result 175613 states and 261243 transitions. [2020-10-28 00:23:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:54,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 00:23:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:54,633 INFO L225 Difference]: With dead ends: 175613 [2020-10-28 00:23:54,633 INFO L226 Difference]: Without dead ends: 72090 [2020-10-28 00:23:54,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72090 states. [2020-10-28 00:24:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72090 to 70167. [2020-10-28 00:24:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70167 states. [2020-10-28 00:24:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70167 states to 70167 states and 104097 transitions. [2020-10-28 00:24:00,203 INFO L78 Accepts]: Start accepts. Automaton has 70167 states and 104097 transitions. Word has length 117 [2020-10-28 00:24:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:00,204 INFO L481 AbstractCegarLoop]: Abstraction has 70167 states and 104097 transitions. [2020-10-28 00:24:00,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:24:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 70167 states and 104097 transitions. [2020-10-28 00:24:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:24:00,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:00,220 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, 1] [2020-10-28 00:24:00,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:24:00,221 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2091256018, now seen corresponding path program 1 times [2020-10-28 00:24:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:00,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220767887] [2020-10-28 00:24:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:05,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:05,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:24:05,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:24:05,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:24:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:24:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:24:05,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:05,575 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:24:05,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:05,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:05,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:05,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:05,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:24:05,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:05,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:05,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:05,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:05,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220767887] [2020-10-28 00:24:05,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:24:05,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:24:05,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613958140] [2020-10-28 00:24:05,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:24:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:24:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:24:05,631 INFO L87 Difference]: Start difference. First operand 70167 states and 104097 transitions. Second operand 6 states. [2020-10-28 00:24:07,578 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:24:10,999 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:24:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:16,236 INFO L93 Difference]: Finished difference Result 196659 states and 290357 transitions. [2020-10-28 00:24:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:24:16,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-28 00:24:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:16,461 INFO L225 Difference]: With dead ends: 196659 [2020-10-28 00:24:16,461 INFO L226 Difference]: Without dead ends: 126585 [2020-10-28 00:24:16,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:24:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126585 states. [2020-10-28 00:24:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126585 to 88073. [2020-10-28 00:24:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88073 states. [2020-10-28 00:24:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88073 states to 88073 states and 128626 transitions. [2020-10-28 00:24:23,991 INFO L78 Accepts]: Start accepts. Automaton has 88073 states and 128626 transitions. Word has length 117 [2020-10-28 00:24:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:23,991 INFO L481 AbstractCegarLoop]: Abstraction has 88073 states and 128626 transitions. [2020-10-28 00:24:23,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:24:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 88073 states and 128626 transitions. [2020-10-28 00:24:24,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:24:24,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:24,007 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, 1] [2020-10-28 00:24:24,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:24:24,007 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash -43222765, now seen corresponding path program 1 times [2020-10-28 00:24:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730205278] [2020-10-28 00:24:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:24,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:24,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:24,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:26,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:29,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 00:24:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:24:29,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:29,538 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:24:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:29,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:29,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:29,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:29,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:24:29,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:29,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:29,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:29,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:29,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:29,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730205278] [2020-10-28 00:24:29,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:24:29,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767554675] [2020-10-28 00:24:29,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:24:29,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:24:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:24:29,600 INFO L87 Difference]: Start difference. First operand 88073 states and 128626 transitions. Second operand 4 states. [2020-10-28 00:24:29,890 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:24:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:38,630 INFO L93 Difference]: Finished difference Result 144813 states and 211708 transitions. [2020-10-28 00:24:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:24:38,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 00:24:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:38,815 INFO L225 Difference]: With dead ends: 144813 [2020-10-28 00:24:38,815 INFO L226 Difference]: Without dead ends: 112202 [2020-10-28 00:24:38,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:24:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112202 states. [2020-10-28 00:24:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112202 to 105655. [2020-10-28 00:24:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105655 states. [2020-10-28 00:24:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105655 states to 105655 states and 152928 transitions. [2020-10-28 00:24:47,581 INFO L78 Accepts]: Start accepts. Automaton has 105655 states and 152928 transitions. Word has length 117 [2020-10-28 00:24:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:47,581 INFO L481 AbstractCegarLoop]: Abstraction has 105655 states and 152928 transitions. [2020-10-28 00:24:47,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:24:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 105655 states and 152928 transitions. [2020-10-28 00:24:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:24:47,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:47,594 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, 1] [2020-10-28 00:24:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:24:47,594 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2044735658, now seen corresponding path program 1 times [2020-10-28 00:24:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:47,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204225039] [2020-10-28 00:24:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:47,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:24:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-28 00:24:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:24:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:52,890 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:24:52,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:52,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204225039] [2020-10-28 00:24:52,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:52,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:24:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31418126] [2020-10-28 00:24:52,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:24:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:24:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:24:52,933 INFO L87 Difference]: Start difference. First operand 105655 states and 152928 transitions. Second operand 4 states. [2020-10-28 00:24:53,208 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:25:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:02,929 INFO L93 Difference]: Finished difference Result 148885 states and 215144 transitions. [2020-10-28 00:25:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:02,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 00:25:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:03,200 INFO L225 Difference]: With dead ends: 148885 [2020-10-28 00:25:03,201 INFO L226 Difference]: Without dead ends: 110120 [2020-10-28 00:25:03,298 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 [2020-10-28 00:25:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110120 states. [2020-10-28 00:25:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110120 to 106895. [2020-10-28 00:25:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106895 states. [2020-10-28 00:25:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106895 states to 106895 states and 152506 transitions. [2020-10-28 00:25:12,431 INFO L78 Accepts]: Start accepts. Automaton has 106895 states and 152506 transitions. Word has length 117 [2020-10-28 00:25:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:12,431 INFO L481 AbstractCegarLoop]: Abstraction has 106895 states and 152506 transitions. [2020-10-28 00:25:12,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 106895 states and 152506 transitions. [2020-10-28 00:25:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:25:12,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:12,446 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, 1] [2020-10-28 00:25:12,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:25:12,446 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1455886702, now seen corresponding path program 1 times [2020-10-28 00:25:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:12,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025457483] [2020-10-28 00:25:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:12,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:12,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:12,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:13,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:17,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:25:17,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:17,754 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:25:17,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:17,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:17,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:17,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:17,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:25:17,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:17,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:25:17,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025457483] [2020-10-28 00:25:17,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:17,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:25:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832864948] [2020-10-28 00:25:17,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:25:17,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:25:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:25:17,789 INFO L87 Difference]: Start difference. First operand 106895 states and 152506 transitions. Second operand 4 states. [2020-10-28 00:25:18,077 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:25:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:31,004 INFO L93 Difference]: Finished difference Result 225854 states and 323107 transitions. [2020-10-28 00:25:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:25:31,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-28 00:25:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:31,480 INFO L225 Difference]: With dead ends: 225854 [2020-10-28 00:25:31,480 INFO L226 Difference]: Without dead ends: 158246 [2020-10-28 00:25:31,547 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 [2020-10-28 00:25:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158246 states. [2020-10-28 00:25:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158246 to 156206. [2020-10-28 00:25:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156206 states. [2020-10-28 00:25:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156206 states to 156206 states and 221263 transitions. [2020-10-28 00:25:44,775 INFO L78 Accepts]: Start accepts. Automaton has 156206 states and 221263 transitions. Word has length 117 [2020-10-28 00:25:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:44,775 INFO L481 AbstractCegarLoop]: Abstraction has 156206 states and 221263 transitions. [2020-10-28 00:25:44,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:25:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 156206 states and 221263 transitions. [2020-10-28 00:25:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 00:25:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:44,793 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, 1] [2020-10-28 00:25:44,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:25:44,793 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash 494033703, now seen corresponding path program 1 times [2020-10-28 00:25:44,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:44,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157969467] [2020-10-28 00:25:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:44,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:49,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:49,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 00:25:49,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:25:49,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:25:49,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:25:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 00:25:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:25:49,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0