/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:13:46,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:13:46,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:13:46,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:13:46,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:13:46,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:13:46,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:13:46,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:13:46,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:13:46,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:13:46,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:13:46,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:13:46,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:13:46,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:13:46,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:13:46,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:13:46,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:13:46,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:13:46,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:13:46,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:13:46,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:13:46,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:13:46,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:13:47,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:13:47,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:13:47,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:13:47,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:13:47,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:13:47,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:13:47,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:13:47,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:13:47,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:13:47,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:13:47,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:13:47,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:13:47,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:13:47,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:13:47,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:13:47,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:13:47,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:13:47,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:13:47,033 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 19:13:47,094 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:13:47,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:13:47,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:13:47,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:13:47,099 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:13:47,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:13:47,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:13:47,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:13:47,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:13:47,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:13:47,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:13:47,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:13:47,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:13:47,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:13:47,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:13:47,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:13:47,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:13:47,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:13:47,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:13:47,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:13:47,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:13:47,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:13:47,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:13:47,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:13:47,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:13:47,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:13:47,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:13:47,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:13:47,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:13:47,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:13:47,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:13:47,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:13:47,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:13:47,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:13:47,613 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:13:47,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:13:47,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a33a7248/1179f76f392f4b7ba6540585a9cf933f/FLAG3da824c44 [2020-10-28 19:13:48,459 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:13:48,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:13:48,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a33a7248/1179f76f392f4b7ba6540585a9cf933f/FLAG3da824c44 [2020-10-28 19:13:48,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a33a7248/1179f76f392f4b7ba6540585a9cf933f [2020-10-28 19:13:48,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:13:48,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:13:48,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:13:48,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:13:48,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:13:48,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:13:48" (1/1) ... [2020-10-28 19:13:48,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe9f425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:48, skipping insertion in model container [2020-10-28 19:13:48,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:13:48" (1/1) ... [2020-10-28 19:13:48,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:13:48,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:13:49,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:13:49,156 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:13:49,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:13:49,330 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:13:49,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49 WrapperNode [2020-10-28 19:13:49,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:13:49,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:13:49,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:13:49,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:13:49,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (1/1) ... [2020-10-28 19:13:49,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:13:49,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:13:49,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:13:49,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:13:49,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (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 19:13:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:13:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:13:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:13:49,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:13:49,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:13:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:13:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:13:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:13:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:13:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:13:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:13:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:13:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:13:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:13:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:13:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:13:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:13:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:13:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:13:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:13:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:13:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:13:50,663 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:13:50,664 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:13:50,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:13:50 BoogieIcfgContainer [2020-10-28 19:13:50,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:13:50,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:13:50,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:13:50,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:13:50,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:13:48" (1/3) ... [2020-10-28 19:13:50,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299f4a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:13:50, skipping insertion in model container [2020-10-28 19:13:50,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:13:49" (2/3) ... [2020-10-28 19:13:50,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@299f4a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:13:50, skipping insertion in model container [2020-10-28 19:13:50,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:13:50" (3/3) ... [2020-10-28 19:13:50,677 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 19:13:50,692 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:13:50,699 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:13:50,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:13:50,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:13:50,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:13:50,746 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:13:50,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:13:50,747 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:13:50,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:13:50,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:13:50,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:13:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 19:13:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 19:13:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:50,790 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] [2020-10-28 19:13:50,790 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 19:13:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:50,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395828156] [2020-10-28 19:13:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:51,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:51,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:53,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:53,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 19:13:53,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:13:53,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2805 [2020-10-28 19:13:53,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:53,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:13:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 19:13:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:13:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:13:54,418 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:13:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:13:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:54,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:13:54,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:13:54,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:13:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:13:54,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:13:54,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:13:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:13:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:13:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:13:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:13:54,481 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 19:13:54,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395828156] [2020-10-28 19:13:54,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:13:54,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:13:54,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125786699] [2020-10-28 19:13:54,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:13:54,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:13:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:13:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:13:54,512 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2020-10-28 19:13:54,883 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:13:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:13:55,808 INFO L93 Difference]: Finished difference Result 338 states and 566 transitions. [2020-10-28 19:13:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:13:55,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 19:13:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:13:55,827 INFO L225 Difference]: With dead ends: 338 [2020-10-28 19:13:55,827 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 19:13:55,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:13:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 19:13:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-10-28 19:13:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 19:13:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2020-10-28 19:13:55,933 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 67 [2020-10-28 19:13:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:13:55,934 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2020-10-28 19:13:55,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:13:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2020-10-28 19:13:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:13:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:13:55,938 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] [2020-10-28 19:13:55,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:13:55,938 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:13:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:13:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash 309649509, now seen corresponding path program 1 times [2020-10-28 19:13:55,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:13:55,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470612540] [2020-10-28 19:13:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:13:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:13:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:56,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:56,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:13:58,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:01,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:01,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:01,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:14:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:01,450 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:01,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:01,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:01,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:01,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:01,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:14:01,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:01,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:01,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:01,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:01,521 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 19:14:01,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470612540] [2020-10-28 19:14:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:01,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:01,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205772697] [2020-10-28 19:14:01,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:01,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:01,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:01,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:01,538 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand 5 states. [2020-10-28 19:14:02,776 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:02,904 INFO L93 Difference]: Finished difference Result 607 states and 973 transitions. [2020-10-28 19:14:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:02,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 19:14:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:02,915 INFO L225 Difference]: With dead ends: 607 [2020-10-28 19:14:02,915 INFO L226 Difference]: Without dead ends: 438 [2020-10-28 19:14:02,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-28 19:14:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 435. [2020-10-28 19:14:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-28 19:14:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 684 transitions. [2020-10-28 19:14:03,015 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 684 transitions. Word has length 69 [2020-10-28 19:14:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:03,016 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 684 transitions. [2020-10-28 19:14:03,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 684 transitions. [2020-10-28 19:14:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:14:03,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:03,020 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] [2020-10-28 19:14:03,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:14:03,021 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:03,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1227978955, now seen corresponding path program 1 times [2020-10-28 19:14:03,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:03,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475171136] [2020-10-28 19:14:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:03,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:07,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:07,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:14:07,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:14:07,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4917 [2020-10-28 19:14:07,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:07,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:14:07,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:14:08,365 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:08,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:08,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:08,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:08,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:08,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:14:08,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:08,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:08,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:08,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:08,441 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 19:14:08,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475171136] [2020-10-28 19:14:08,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:08,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:08,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235693637] [2020-10-28 19:14:08,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:08,444 INFO L87 Difference]: Start difference. First operand 435 states and 684 transitions. Second operand 5 states. [2020-10-28 19:14:09,584 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:09,705 INFO L93 Difference]: Finished difference Result 1142 states and 1824 transitions. [2020-10-28 19:14:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:09,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:14:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:09,715 INFO L225 Difference]: With dead ends: 1142 [2020-10-28 19:14:09,715 INFO L226 Difference]: Without dead ends: 819 [2020-10-28 19:14:09,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-28 19:14:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 816. [2020-10-28 19:14:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-28 19:14:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1274 transitions. [2020-10-28 19:14:09,833 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1274 transitions. Word has length 70 [2020-10-28 19:14:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:09,834 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1274 transitions. [2020-10-28 19:14:09,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1274 transitions. [2020-10-28 19:14:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:14:09,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:09,839 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] [2020-10-28 19:14:09,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:14:09,840 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2019754633, now seen corresponding path program 1 times [2020-10-28 19:14:09,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:09,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884964851] [2020-10-28 19:14:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:09,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:14,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:14,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:14:14,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:14,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:14:14,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:14,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:14,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:14,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:14,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:14:14,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:15,184 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:15,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:15,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:15,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:15,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:15,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:15,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:14:15,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:15,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:15,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:15,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:15,271 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 19:14:15,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884964851] [2020-10-28 19:14:15,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:15,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:15,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709785173] [2020-10-28 19:14:15,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:15,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:15,276 INFO L87 Difference]: Start difference. First operand 816 states and 1274 transitions. Second operand 5 states. [2020-10-28 19:14:16,336 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:16,508 INFO L93 Difference]: Finished difference Result 2333 states and 3632 transitions. [2020-10-28 19:14:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:16,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 19:14:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:16,520 INFO L225 Difference]: With dead ends: 2333 [2020-10-28 19:14:16,520 INFO L226 Difference]: Without dead ends: 1546 [2020-10-28 19:14:16,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-28 19:14:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1543. [2020-10-28 19:14:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-28 19:14:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2384 transitions. [2020-10-28 19:14:16,689 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2384 transitions. Word has length 70 [2020-10-28 19:14:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:16,690 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2384 transitions. [2020-10-28 19:14:16,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2384 transitions. [2020-10-28 19:14:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:14:16,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:16,695 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] [2020-10-28 19:14:16,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:14:16,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash 213130055, now seen corresponding path program 1 times [2020-10-28 19:14:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:16,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467519359] [2020-10-28 19:14:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:16,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:21,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:21,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:14:21,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:14:21,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:14:21,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:21,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:21,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:21,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:21,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 19:14:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:22,208 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:22,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:22,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:22,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:14:22,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:22,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:22,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:14:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467519359] [2020-10-28 19:14:22,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:22,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123368016] [2020-10-28 19:14:22,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:22,264 INFO L87 Difference]: Start difference. First operand 1543 states and 2384 transitions. Second operand 5 states. [2020-10-28 19:14:23,482 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:23,702 INFO L93 Difference]: Finished difference Result 4298 states and 6701 transitions. [2020-10-28 19:14:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:23,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 19:14:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:23,720 INFO L225 Difference]: With dead ends: 4298 [2020-10-28 19:14:23,721 INFO L226 Difference]: Without dead ends: 2958 [2020-10-28 19:14:23,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-10-28 19:14:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2955. [2020-10-28 19:14:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-10-28 19:14:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4535 transitions. [2020-10-28 19:14:24,030 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4535 transitions. Word has length 71 [2020-10-28 19:14:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:24,031 INFO L481 AbstractCegarLoop]: Abstraction has 2955 states and 4535 transitions. [2020-10-28 19:14:24,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4535 transitions. [2020-10-28 19:14:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:14:24,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:24,039 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] [2020-10-28 19:14:24,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:14:24,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1131152968, now seen corresponding path program 1 times [2020-10-28 19:14:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883003064] [2020-10-28 19:14:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:25,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:25,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:14:25,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 19:14:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 19:14:25,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:26,043 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:26,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:26,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:26,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:26,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:26,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:14:26,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:26,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:26,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:26,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:26,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:14:26,113 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 19:14:26,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883003064] [2020-10-28 19:14:26,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:26,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:14:26,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907936505] [2020-10-28 19:14:26,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:14:26,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:14:26,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:14:26,119 INFO L87 Difference]: Start difference. First operand 2955 states and 4535 transitions. Second operand 4 states. [2020-10-28 19:14:26,482 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:14:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:27,637 INFO L93 Difference]: Finished difference Result 7297 states and 11691 transitions. [2020-10-28 19:14:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:14:27,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:14:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:27,670 INFO L225 Difference]: With dead ends: 7297 [2020-10-28 19:14:27,670 INFO L226 Difference]: Without dead ends: 5006 [2020-10-28 19:14:27,678 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 19:14:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2020-10-28 19:14:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 5003. [2020-10-28 19:14:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5003 states. [2020-10-28 19:14:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 7879 transitions. [2020-10-28 19:14:28,245 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 7879 transitions. Word has length 71 [2020-10-28 19:14:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:28,246 INFO L481 AbstractCegarLoop]: Abstraction has 5003 states and 7879 transitions. [2020-10-28 19:14:28,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:14:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 7879 transitions. [2020-10-28 19:14:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:14:28,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:28,253 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] [2020-10-28 19:14:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:14:28,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash 175148071, now seen corresponding path program 1 times [2020-10-28 19:14:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209124382] [2020-10-28 19:14:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:28,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:28,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:28,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:28,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:28,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:29,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:31,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:14:31,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:14:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3303 [2020-10-28 19:14:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:31,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:14:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:31,906 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:31,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:31,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:31,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:31,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:31,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:31,959 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 19:14:31,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209124382] [2020-10-28 19:14:31,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:31,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980673530] [2020-10-28 19:14:31,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:31,963 INFO L87 Difference]: Start difference. First operand 5003 states and 7879 transitions. Second operand 5 states. [2020-10-28 19:14:33,816 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:34,515 INFO L93 Difference]: Finished difference Result 14171 states and 22429 transitions. [2020-10-28 19:14:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:34,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:14:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:34,572 INFO L225 Difference]: With dead ends: 14171 [2020-10-28 19:14:34,572 INFO L226 Difference]: Without dead ends: 9560 [2020-10-28 19:14:34,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9560 states. [2020-10-28 19:14:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9560 to 9557. [2020-10-28 19:14:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9557 states. [2020-10-28 19:14:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9557 states to 9557 states and 14889 transitions. [2020-10-28 19:14:35,749 INFO L78 Accepts]: Start accepts. Automaton has 9557 states and 14889 transitions. Word has length 74 [2020-10-28 19:14:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:35,749 INFO L481 AbstractCegarLoop]: Abstraction has 9557 states and 14889 transitions. [2020-10-28 19:14:35,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9557 states and 14889 transitions. [2020-10-28 19:14:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:14:35,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:35,763 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] [2020-10-28 19:14:35,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:14:35,763 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -433399397, now seen corresponding path program 1 times [2020-10-28 19:14:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:35,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744959598] [2020-10-28 19:14:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:38,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:40,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:40,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:14:40,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:14:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:14:40,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:41,198 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:41,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:41,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:41,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:41,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:14:41,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:41,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:41,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:41,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:41,257 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 19:14:41,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744959598] [2020-10-28 19:14:41,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:41,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:41,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200024488] [2020-10-28 19:14:41,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:41,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:41,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:41,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:41,259 INFO L87 Difference]: Start difference. First operand 9557 states and 14889 transitions. Second operand 5 states. [2020-10-28 19:14:41,561 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:14:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:43,822 INFO L93 Difference]: Finished difference Result 16969 states and 26466 transitions. [2020-10-28 19:14:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:43,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:14:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:43,870 INFO L225 Difference]: With dead ends: 16969 [2020-10-28 19:14:43,870 INFO L226 Difference]: Without dead ends: 12414 [2020-10-28 19:14:43,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:14:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2020-10-28 19:14:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 12411. [2020-10-28 19:14:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2020-10-28 19:14:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 18966 transitions. [2020-10-28 19:14:45,330 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 18966 transitions. Word has length 74 [2020-10-28 19:14:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:45,330 INFO L481 AbstractCegarLoop]: Abstraction has 12411 states and 18966 transitions. [2020-10-28 19:14:45,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 18966 transitions. [2020-10-28 19:14:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:14:45,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:45,350 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] [2020-10-28 19:14:45,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:14:45,351 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash 494135313, now seen corresponding path program 1 times [2020-10-28 19:14:45,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:45,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496188078] [2020-10-28 19:14:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:45,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:45,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:14:50,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:14:50,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 19:14:50,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:50,701 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:14:50,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:14:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:50,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:14:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:14:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:14:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:14:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:14:50,749 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 19:14:50,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496188078] [2020-10-28 19:14:50,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:14:50,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:14:50,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181115707] [2020-10-28 19:14:50,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:14:50,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:14:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:14:50,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:14:50,751 INFO L87 Difference]: Start difference. First operand 12411 states and 18966 transitions. Second operand 5 states. [2020-10-28 19:14:52,617 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 19:14:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:14:53,711 INFO L93 Difference]: Finished difference Result 35870 states and 54801 transitions. [2020-10-28 19:14:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:14:53,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-28 19:14:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:14:53,771 INFO L225 Difference]: With dead ends: 35870 [2020-10-28 19:14:53,771 INFO L226 Difference]: Without dead ends: 23813 [2020-10-28 19:14:53,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:14:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23813 states. [2020-10-28 19:14:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23813 to 23810. [2020-10-28 19:14:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23810 states. [2020-10-28 19:14:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23810 states to 23810 states and 35983 transitions. [2020-10-28 19:14:55,774 INFO L78 Accepts]: Start accepts. Automaton has 23810 states and 35983 transitions. Word has length 74 [2020-10-28 19:14:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:14:55,774 INFO L481 AbstractCegarLoop]: Abstraction has 23810 states and 35983 transitions. [2020-10-28 19:14:55,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:14:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 23810 states and 35983 transitions. [2020-10-28 19:14:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:14:55,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:14:55,807 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] [2020-10-28 19:14:55,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:14:55,807 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:14:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:14:55,808 INFO L82 PathProgramCache]: Analyzing trace with hash 677298846, now seen corresponding path program 1 times [2020-10-28 19:14:55,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:14:55,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949797154] [2020-10-28 19:14:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:14:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:14:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:55,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:14:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:15:00,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:15:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:15:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:01,120 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:01,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:01,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:15:01,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:01,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:01,158 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 19:15:01,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949797154] [2020-10-28 19:15:01,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:01,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:15:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857998936] [2020-10-28 19:15:01,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:15:01,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:15:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:15:01,161 INFO L87 Difference]: Start difference. First operand 23810 states and 35983 transitions. Second operand 4 states. [2020-10-28 19:15:01,479 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 19:15:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:04,745 INFO L93 Difference]: Finished difference Result 55368 states and 86163 transitions. [2020-10-28 19:15:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:04,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 19:15:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:04,839 INFO L225 Difference]: With dead ends: 55368 [2020-10-28 19:15:04,839 INFO L226 Difference]: Without dead ends: 35461 [2020-10-28 19:15:04,881 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 19:15:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35461 states. [2020-10-28 19:15:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35461 to 35458. [2020-10-28 19:15:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35458 states. [2020-10-28 19:15:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 52911 transitions. [2020-10-28 19:15:07,899 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 52911 transitions. Word has length 75 [2020-10-28 19:15:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:07,899 INFO L481 AbstractCegarLoop]: Abstraction has 35458 states and 52911 transitions. [2020-10-28 19:15:07,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:15:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 52911 transitions. [2020-10-28 19:15:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:15:07,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:07,932 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 19:15:07,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:15:07,932 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1811444415, now seen corresponding path program 1 times [2020-10-28 19:15:07,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:07,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984845774] [2020-10-28 19:15:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:07,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:07,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:07,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:08,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:08,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:12,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:12,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:15:12,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:15:12,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 19:15:12,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:13,279 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:13,310 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 19:15:13,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984845774] [2020-10-28 19:15:13,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:13,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:13,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578151111] [2020-10-28 19:15:13,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:13,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:13,313 INFO L87 Difference]: Start difference. First operand 35458 states and 52911 transitions. Second operand 5 states. [2020-10-28 19:15:13,593 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:15:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:17,746 INFO L93 Difference]: Finished difference Result 57896 states and 86391 transitions. [2020-10-28 19:15:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:15:17,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:15:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:17,833 INFO L225 Difference]: With dead ends: 57896 [2020-10-28 19:15:17,834 INFO L226 Difference]: Without dead ends: 40037 [2020-10-28 19:15:17,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:15:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40037 states. [2020-10-28 19:15:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40037 to 40034. [2020-10-28 19:15:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40034 states. [2020-10-28 19:15:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40034 states to 40034 states and 59043 transitions. [2020-10-28 19:15:21,846 INFO L78 Accepts]: Start accepts. Automaton has 40034 states and 59043 transitions. Word has length 78 [2020-10-28 19:15:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:21,847 INFO L481 AbstractCegarLoop]: Abstraction has 40034 states and 59043 transitions. [2020-10-28 19:15:21,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 40034 states and 59043 transitions. [2020-10-28 19:15:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:15:21,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:21,873 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 19:15:21,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:15:21,873 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1303410491, now seen corresponding path program 1 times [2020-10-28 19:15:21,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:21,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697499638] [2020-10-28 19:15:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:21,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:22,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:25,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:26,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:26,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:15:26,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:15:26,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:26,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 19:15:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:15:26,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:27,213 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:27,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:27,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:27,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:27,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:27,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:27,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:27,318 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 19:15:27,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697499638] [2020-10-28 19:15:27,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:27,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:27,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933076438] [2020-10-28 19:15:27,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:27,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:27,328 INFO L87 Difference]: Start difference. First operand 40034 states and 59043 transitions. Second operand 5 states. [2020-10-28 19:15:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:30,265 INFO L93 Difference]: Finished difference Result 64632 states and 95460 transitions. [2020-10-28 19:15:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:30,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:15:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:30,306 INFO L225 Difference]: With dead ends: 64632 [2020-10-28 19:15:30,307 INFO L226 Difference]: Without dead ends: 25237 [2020-10-28 19:15:30,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 19:15:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2020-10-28 19:15:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 25237. [2020-10-28 19:15:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25237 states. [2020-10-28 19:15:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25237 states to 25237 states and 37181 transitions. [2020-10-28 19:15:32,809 INFO L78 Accepts]: Start accepts. Automaton has 25237 states and 37181 transitions. Word has length 78 [2020-10-28 19:15:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:32,809 INFO L481 AbstractCegarLoop]: Abstraction has 25237 states and 37181 transitions. [2020-10-28 19:15:32,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25237 states and 37181 transitions. [2020-10-28 19:15:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:15:32,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:32,825 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 19:15:32,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:15:32,825 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1127866419, now seen corresponding path program 1 times [2020-10-28 19:15:32,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:32,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721715939] [2020-10-28 19:15:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:32,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:33,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:37,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:15:37,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 19:15:37,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 19:15:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:38,159 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:38,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:38,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:38,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:38,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:38,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:38,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:38,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:38,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:38,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:38,191 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 19:15:38,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721715939] [2020-10-28 19:15:38,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:38,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686615812] [2020-10-28 19:15:38,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:38,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:38,193 INFO L87 Difference]: Start difference. First operand 25237 states and 37181 transitions. Second operand 5 states. [2020-10-28 19:15:38,509 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:15:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:42,228 INFO L93 Difference]: Finished difference Result 45436 states and 66638 transitions. [2020-10-28 19:15:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:15:42,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:15:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:42,264 INFO L225 Difference]: With dead ends: 45436 [2020-10-28 19:15:42,265 INFO L226 Difference]: Without dead ends: 29011 [2020-10-28 19:15:42,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:15:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29011 states. [2020-10-28 19:15:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29011 to 29008. [2020-10-28 19:15:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29008 states. [2020-10-28 19:15:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29008 states to 29008 states and 42016 transitions. [2020-10-28 19:15:44,978 INFO L78 Accepts]: Start accepts. Automaton has 29008 states and 42016 transitions. Word has length 78 [2020-10-28 19:15:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:44,979 INFO L481 AbstractCegarLoop]: Abstraction has 29008 states and 42016 transitions. [2020-10-28 19:15:44,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29008 states and 42016 transitions. [2020-10-28 19:15:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:15:44,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:44,994 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 19:15:44,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:15:44,995 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash 545851375, now seen corresponding path program 1 times [2020-10-28 19:15:44,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:44,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436427252] [2020-10-28 19:15:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:50,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:15:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:50,339 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:15:50,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:15:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:50,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:50,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:15:50,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:15:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:15:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:15:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:15:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436427252] [2020-10-28 19:15:50,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:15:50,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:15:50,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083949268] [2020-10-28 19:15:50,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:15:50,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:15:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:15:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:15:50,372 INFO L87 Difference]: Start difference. First operand 29008 states and 42016 transitions. Second operand 5 states. [2020-10-28 19:15:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:15:53,013 INFO L93 Difference]: Finished difference Result 47661 states and 69208 transitions. [2020-10-28 19:15:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:15:53,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 19:15:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:15:53,039 INFO L225 Difference]: With dead ends: 47661 [2020-10-28 19:15:53,039 INFO L226 Difference]: Without dead ends: 19573 [2020-10-28 19:15:53,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 19:15:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19573 states. [2020-10-28 19:15:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19573 to 19571. [2020-10-28 19:15:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19571 states. [2020-10-28 19:15:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19571 states to 19571 states and 28226 transitions. [2020-10-28 19:15:54,801 INFO L78 Accepts]: Start accepts. Automaton has 19571 states and 28226 transitions. Word has length 78 [2020-10-28 19:15:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:15:54,801 INFO L481 AbstractCegarLoop]: Abstraction has 19571 states and 28226 transitions. [2020-10-28 19:15:54,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:15:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 19571 states and 28226 transitions. [2020-10-28 19:15:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:15:54,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:15:54,811 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 19:15:54,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:15:54,812 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:15:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:15:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1289076292, now seen corresponding path program 1 times [2020-10-28 19:15:54,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:15:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568731937] [2020-10-28 19:15:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:15:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:15:54,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:55,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:56,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:57,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:15:59,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:15:59,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:15:59,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:15:59,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:00,303 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:00,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:00,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:00,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:00,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:00,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:00,348 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 19:16:00,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568731937] [2020-10-28 19:16:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721937721] [2020-10-28 19:16:00,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:00,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:00,350 INFO L87 Difference]: Start difference. First operand 19571 states and 28226 transitions. Second operand 5 states. [2020-10-28 19:16:00,654 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:16:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:03,829 INFO L93 Difference]: Finished difference Result 34249 states and 49769 transitions. [2020-10-28 19:16:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:16:03,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:16:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:03,860 INFO L225 Difference]: With dead ends: 34249 [2020-10-28 19:16:03,860 INFO L226 Difference]: Without dead ends: 20207 [2020-10-28 19:16:03,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:16:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20207 states. [2020-10-28 19:16:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20207 to 20200. [2020-10-28 19:16:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20200 states. [2020-10-28 19:16:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20200 states to 20200 states and 28929 transitions. [2020-10-28 19:16:05,701 INFO L78 Accepts]: Start accepts. Automaton has 20200 states and 28929 transitions. Word has length 79 [2020-10-28 19:16:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:05,701 INFO L481 AbstractCegarLoop]: Abstraction has 20200 states and 28929 transitions. [2020-10-28 19:16:05,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20200 states and 28929 transitions. [2020-10-28 19:16:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:16:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:05,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:05,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:16:05,712 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1480497188, now seen corresponding path program 1 times [2020-10-28 19:16:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:05,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789930955] [2020-10-28 19:16:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:05,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:05,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:06,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:07,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1632 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:16:07,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:07,679 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:07,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:07,723 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 19:16:07,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789930955] [2020-10-28 19:16:07,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:07,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234472888] [2020-10-28 19:16:07,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:07,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:07,726 INFO L87 Difference]: Start difference. First operand 20200 states and 28929 transitions. Second operand 4 states. [2020-10-28 19:16:09,333 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:16:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:11,153 INFO L93 Difference]: Finished difference Result 37143 states and 54520 transitions. [2020-10-28 19:16:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:11,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:16:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:11,197 INFO L225 Difference]: With dead ends: 37143 [2020-10-28 19:16:11,197 INFO L226 Difference]: Without dead ends: 25581 [2020-10-28 19:16:11,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 19:16:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25581 states. [2020-10-28 19:16:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25581 to 24872. [2020-10-28 19:16:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24872 states. [2020-10-28 19:16:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24872 states to 24872 states and 35759 transitions. [2020-10-28 19:16:13,829 INFO L78 Accepts]: Start accepts. Automaton has 24872 states and 35759 transitions. Word has length 79 [2020-10-28 19:16:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:13,830 INFO L481 AbstractCegarLoop]: Abstraction has 24872 states and 35759 transitions. [2020-10-28 19:16:13,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24872 states and 35759 transitions. [2020-10-28 19:16:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:16:13,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:13,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:16:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:16:13,940 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:13,940 INFO L82 PathProgramCache]: Analyzing trace with hash 429011970, now seen corresponding path program 1 times [2020-10-28 19:16:13,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:13,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231293108] [2020-10-28 19:16:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:13,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:14,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:14,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:18,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:16:18,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:16:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 19:16:18,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:19,347 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:19,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:19,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:19,390 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 19:16:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231293108] [2020-10-28 19:16:19,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:19,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:16:19,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883425494] [2020-10-28 19:16:19,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:16:19,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:16:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:16:19,393 INFO L87 Difference]: Start difference. First operand 24872 states and 35759 transitions. Second operand 5 states. [2020-10-28 19:16:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:22,136 INFO L93 Difference]: Finished difference Result 27504 states and 39292 transitions. [2020-10-28 19:16:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:22,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-28 19:16:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:22,164 INFO L225 Difference]: With dead ends: 27504 [2020-10-28 19:16:22,164 INFO L226 Difference]: Without dead ends: 21961 [2020-10-28 19:16:22,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:16:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21961 states. [2020-10-28 19:16:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21961 to 21961. [2020-10-28 19:16:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21961 states. [2020-10-28 19:16:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21961 states to 21961 states and 31650 transitions. [2020-10-28 19:16:24,323 INFO L78 Accepts]: Start accepts. Automaton has 21961 states and 31650 transitions. Word has length 79 [2020-10-28 19:16:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:24,324 INFO L481 AbstractCegarLoop]: Abstraction has 21961 states and 31650 transitions. [2020-10-28 19:16:24,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:16:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 21961 states and 31650 transitions. [2020-10-28 19:16:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:16:24,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:24,336 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 19:16:24,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:16:24,336 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1586640498, now seen corresponding path program 1 times [2020-10-28 19:16:24,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:24,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969583057] [2020-10-28 19:16:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:24,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:24,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:25,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:29,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:29,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:16:29,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:16:29,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:29,650 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:29,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:29,678 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 19:16:29,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969583057] [2020-10-28 19:16:29,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:29,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:29,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373867923] [2020-10-28 19:16:29,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:29,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:29,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:29,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:29,680 INFO L87 Difference]: Start difference. First operand 21961 states and 31650 transitions. Second operand 4 states. [2020-10-28 19:16:29,986 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:16:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:33,218 INFO L93 Difference]: Finished difference Result 38392 states and 56412 transitions. [2020-10-28 19:16:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:33,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:16:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:33,249 INFO L225 Difference]: With dead ends: 38392 [2020-10-28 19:16:33,250 INFO L226 Difference]: Without dead ends: 23385 [2020-10-28 19:16:33,264 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 19:16:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23385 states. [2020-10-28 19:16:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23385 to 23183. [2020-10-28 19:16:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23183 states. [2020-10-28 19:16:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23183 states to 23183 states and 34041 transitions. [2020-10-28 19:16:35,638 INFO L78 Accepts]: Start accepts. Automaton has 23183 states and 34041 transitions. Word has length 80 [2020-10-28 19:16:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:35,639 INFO L481 AbstractCegarLoop]: Abstraction has 23183 states and 34041 transitions. [2020-10-28 19:16:35,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 23183 states and 34041 transitions. [2020-10-28 19:16:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:16:35,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:35,643 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 19:16:35,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:16:35,643 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2013763947, now seen corresponding path program 1 times [2020-10-28 19:16:35,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:35,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841821807] [2020-10-28 19:16:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:35,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:36,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:37,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2329 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 19:16:37,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:38,254 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:38,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:38,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:38,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:38,282 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 19:16:38,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841821807] [2020-10-28 19:16:38,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:38,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615198396] [2020-10-28 19:16:38,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:38,284 INFO L87 Difference]: Start difference. First operand 23183 states and 34041 transitions. Second operand 4 states. [2020-10-28 19:16:38,577 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:16:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:42,124 INFO L93 Difference]: Finished difference Result 40044 states and 59642 transitions. [2020-10-28 19:16:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:42,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:16:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:42,165 INFO L225 Difference]: With dead ends: 40044 [2020-10-28 19:16:42,165 INFO L226 Difference]: Without dead ends: 27656 [2020-10-28 19:16:42,181 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 19:16:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27656 states. [2020-10-28 19:16:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27656 to 27653. [2020-10-28 19:16:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27653 states. [2020-10-28 19:16:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27653 states to 27653 states and 40961 transitions. [2020-10-28 19:16:45,164 INFO L78 Accepts]: Start accepts. Automaton has 27653 states and 40961 transitions. Word has length 83 [2020-10-28 19:16:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:45,165 INFO L481 AbstractCegarLoop]: Abstraction has 27653 states and 40961 transitions. [2020-10-28 19:16:45,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27653 states and 40961 transitions. [2020-10-28 19:16:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:16:45,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:45,167 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 19:16:45,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 19:16:45,168 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -520062856, now seen corresponding path program 1 times [2020-10-28 19:16:45,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:45,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759281971] [2020-10-28 19:16:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:45,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:45,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:45,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2266 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:16:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 19:16:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 19:16:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:47,718 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:16:47,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:16:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:47,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:47,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:16:47,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:16:47,744 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 19:16:47,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759281971] [2020-10-28 19:16:47,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:16:47,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:16:47,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410601436] [2020-10-28 19:16:47,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:16:47,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:16:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:16:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:16:47,747 INFO L87 Difference]: Start difference. First operand 27653 states and 40961 transitions. Second operand 4 states. [2020-10-28 19:16:48,776 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:16:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:16:52,321 INFO L93 Difference]: Finished difference Result 61911 states and 92497 transitions. [2020-10-28 19:16:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:16:52,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:16:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:16:52,379 INFO L225 Difference]: With dead ends: 61911 [2020-10-28 19:16:52,380 INFO L226 Difference]: Without dead ends: 36169 [2020-10-28 19:16:52,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 19:16:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36169 states. [2020-10-28 19:16:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36169 to 35387. [2020-10-28 19:16:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35387 states. [2020-10-28 19:16:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35387 states to 35387 states and 52185 transitions. [2020-10-28 19:16:56,111 INFO L78 Accepts]: Start accepts. Automaton has 35387 states and 52185 transitions. Word has length 83 [2020-10-28 19:16:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:16:56,111 INFO L481 AbstractCegarLoop]: Abstraction has 35387 states and 52185 transitions. [2020-10-28 19:16:56,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:16:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35387 states and 52185 transitions. [2020-10-28 19:16:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:16:56,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:16:56,114 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 19:16:56,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 19:16:56,114 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:16:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:16:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1483652579, now seen corresponding path program 1 times [2020-10-28 19:16:56,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:16:56,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114677155] [2020-10-28 19:16:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:16:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:16:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:56,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:16:57,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4654 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:17:00,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 19:17:00,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 19:17:00,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:01,060 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:01,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:01,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:01,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:01,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:01,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:01,090 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 19:17:01,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114677155] [2020-10-28 19:17:01,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:01,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:17:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573640043] [2020-10-28 19:17:01,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:17:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:17:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:17:01,092 INFO L87 Difference]: Start difference. First operand 35387 states and 52185 transitions. Second operand 4 states. [2020-10-28 19:17:01,397 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 19:17:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:17:07,029 INFO L93 Difference]: Finished difference Result 80281 states and 120345 transitions. [2020-10-28 19:17:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:17:07,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-28 19:17:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:17:07,094 INFO L225 Difference]: With dead ends: 80281 [2020-10-28 19:17:07,094 INFO L226 Difference]: Without dead ends: 46271 [2020-10-28 19:17:07,122 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 19:17:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46271 states. [2020-10-28 19:17:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46271 to 46268. [2020-10-28 19:17:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46268 states. [2020-10-28 19:17:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46268 states to 46268 states and 69379 transitions. [2020-10-28 19:17:12,306 INFO L78 Accepts]: Start accepts. Automaton has 46268 states and 69379 transitions. Word has length 87 [2020-10-28 19:17:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:17:12,306 INFO L481 AbstractCegarLoop]: Abstraction has 46268 states and 69379 transitions. [2020-10-28 19:17:12,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:17:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 46268 states and 69379 transitions. [2020-10-28 19:17:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:17:12,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:12,308 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 19:17:12,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 19:17:12,309 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -861180899, now seen corresponding path program 1 times [2020-10-28 19:17:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:12,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695583276] [2020-10-28 19:17:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:16,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4630 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:17:16,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 19:17:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:17,245 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 19:17:17,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:17:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:17,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:17,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:17:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:17:17,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:17:17,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:17:17,369 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 19:17:17,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695583276] [2020-10-28 19:17:17,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:17:17,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:17:17,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732027151] [2020-10-28 19:17:17,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:17:17,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:17:17,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:17:17,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:17:17,370 INFO L87 Difference]: Start difference. First operand 46268 states and 69379 transitions. Second operand 4 states. [2020-10-28 19:17:18,227 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 201