/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.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:24:13,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:24:13,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:24:13,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:24:13,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:24:13,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:24:13,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:24:13,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:24:13,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:24:13,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:24:13,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:24:13,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:24:13,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:24:13,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:24:13,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:24:13,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:24:13,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:24:13,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:24:13,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:24:13,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:24:13,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:24:13,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:24:13,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:24:13,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:24:13,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:24:13,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:24:13,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:24:13,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:24:13,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:24:13,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:24:13,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:24:13,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:24:13,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:24:13,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:24:13,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:24:13,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:24:13,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:24:13,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:24:13,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:24:13,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:24:13,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:24:13,634 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 19:24:13,661 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:24:13,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:24:13,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:24:13,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:24:13,663 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:24:13,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:24:13,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:24:13,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:24:13,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:24:13,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:24:13,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:24:13,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:24:13,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:24:13,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:24:13,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:24:13,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:24:13,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:24:13,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:24:13,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:24:13,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:24:13,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:24:13,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:24:13,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:24:13,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:24:13,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:24:13,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:24:13,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:24:13,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:24:13,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:24:13,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:24:14,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:24:14,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:24:14,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:24:14,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:24:14,083 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:24:14,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:24:14,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ece12a84/9716bfca907b41088a1b971a958bd7b8/FLAG92a6d802f [2020-10-28 19:24:15,077 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:24:15,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:24:15,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ece12a84/9716bfca907b41088a1b971a958bd7b8/FLAG92a6d802f [2020-10-28 19:24:15,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ece12a84/9716bfca907b41088a1b971a958bd7b8 [2020-10-28 19:24:15,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:24:15,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:24:15,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:15,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:24:15,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:24:15,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:15" (1/1) ... [2020-10-28 19:24:15,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7448b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:15, skipping insertion in model container [2020-10-28 19:24:15,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:15" (1/1) ... [2020-10-28 19:24:15,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:24:15,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:24:17,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:17,097 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:24:17,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:18,035 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:24:18,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18 WrapperNode [2020-10-28 19:24:18,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:18,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:24:18,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:24:18,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:24:18,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (1/1) ... [2020-10-28 19:24:18,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:24:18,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:24:18,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:24:18,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:24:18,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (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 19:24:18,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:24:18,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:24:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:24:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:24:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:24:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:24:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:24:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:24:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:24:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:24:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:24:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:24:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:24:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:24:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:24:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:24:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:24:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:24:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:24:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:24:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:24:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:24:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:24:22,009 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:24:22,009 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:24:22,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:22 BoogieIcfgContainer [2020-10-28 19:24:22,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:24:22,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:24:22,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:24:22,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:24:22,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:24:15" (1/3) ... [2020-10-28 19:24:22,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2addd479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:22, skipping insertion in model container [2020-10-28 19:24:22,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:18" (2/3) ... [2020-10-28 19:24:22,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2addd479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:22, skipping insertion in model container [2020-10-28 19:24:22,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:22" (3/3) ... [2020-10-28 19:24:22,022 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 19:24:22,036 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:24:22,042 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:24:22,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:24:22,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:24:22,095 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:24:22,095 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:24:22,095 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:24:22,096 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:24:22,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:24:22,096 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:24:22,096 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:24:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states. [2020-10-28 19:24:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 19:24:22,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:22,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:22,173 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash -248347841, now seen corresponding path program 1 times [2020-10-28 19:24:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:22,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379138297] [2020-10-28 19:24:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:27,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 19:24:27,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:24:27,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-28 19:24:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:27,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 19:24:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-10-28 19:24:27,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:24:29,136 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:24:29,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:29,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:29,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:29,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:24:29,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:29,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:29,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:29,423 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 19:24:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379138297] [2020-10-28 19:24:29,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:29,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853608171] [2020-10-28 19:24:29,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:29,454 INFO L87 Difference]: Start difference. First operand 1031 states. Second operand 4 states. [2020-10-28 19:24:30,525 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 19:24:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:39,522 INFO L93 Difference]: Finished difference Result 1809 states and 3227 transitions. [2020-10-28 19:24:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:39,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-28 19:24:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:39,561 INFO L225 Difference]: With dead ends: 1809 [2020-10-28 19:24:39,561 INFO L226 Difference]: Without dead ends: 1520 [2020-10-28 19:24:39,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-10-28 19:24:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1517. [2020-10-28 19:24:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-10-28 19:24:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2337 transitions. [2020-10-28 19:24:39,739 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2337 transitions. Word has length 328 [2020-10-28 19:24:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:39,741 INFO L481 AbstractCegarLoop]: Abstraction has 1517 states and 2337 transitions. [2020-10-28 19:24:39,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2337 transitions. [2020-10-28 19:24:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 19:24:39,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:39,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:39,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:24:39,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1869741437, now seen corresponding path program 1 times [2020-10-28 19:24:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:39,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884478901] [2020-10-28 19:24:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:39,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:42,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:43,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:44,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:44,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 19:24:44,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:44,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 19:24:44,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:44,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:24:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 19:24:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:46,030 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:24:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:46,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:46,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:46,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:24:46,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:46,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:46,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:46,284 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 19:24:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884478901] [2020-10-28 19:24:46,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:46,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:46,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654622031] [2020-10-28 19:24:46,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:46,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:46,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:46,303 INFO L87 Difference]: Start difference. First operand 1517 states and 2337 transitions. Second operand 4 states. [2020-10-28 19:24:47,429 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 19:24:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:54,865 INFO L93 Difference]: Finished difference Result 2970 states and 4624 transitions. [2020-10-28 19:24:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:54,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-28 19:24:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:54,884 INFO L225 Difference]: With dead ends: 2970 [2020-10-28 19:24:54,884 INFO L226 Difference]: Without dead ends: 2602 [2020-10-28 19:24:54,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2020-10-28 19:24:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2599. [2020-10-28 19:24:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2599 states. [2020-10-28 19:24:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4020 transitions. [2020-10-28 19:24:55,040 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4020 transitions. Word has length 328 [2020-10-28 19:24:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:55,041 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 4020 transitions. [2020-10-28 19:24:55,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4020 transitions. [2020-10-28 19:24:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 19:24:55,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:55,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:55,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:24:55,051 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1880238502, now seen corresponding path program 1 times [2020-10-28 19:24:55,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:55,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858809391] [2020-10-28 19:24:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:56,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:57,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:58,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:00,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:00,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-28 19:25:00,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:25:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:25:00,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:00,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-28 19:25:00,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:25:01,393 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:25:01,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:01,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:01,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:01,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:25:01,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:01,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 19:25:01,674 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 19:25:01,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858809391] [2020-10-28 19:25:01,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:01,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:01,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843233248] [2020-10-28 19:25:01,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:01,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:01,677 INFO L87 Difference]: Start difference. First operand 2599 states and 4020 transitions. Second operand 5 states. [2020-10-28 19:25:11,128 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:25:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:13,978 INFO L93 Difference]: Finished difference Result 7669 states and 11843 transitions. [2020-10-28 19:25:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:13,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-10-28 19:25:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:14,005 INFO L225 Difference]: With dead ends: 7669 [2020-10-28 19:25:14,005 INFO L226 Difference]: Without dead ends: 5087 [2020-10-28 19:25:14,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2020-10-28 19:25:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 4986. [2020-10-28 19:25:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4986 states. [2020-10-28 19:25:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4986 states to 4986 states and 7669 transitions. [2020-10-28 19:25:14,228 INFO L78 Accepts]: Start accepts. Automaton has 4986 states and 7669 transitions. Word has length 328 [2020-10-28 19:25:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:14,229 INFO L481 AbstractCegarLoop]: Abstraction has 4986 states and 7669 transitions. [2020-10-28 19:25:14,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4986 states and 7669 transitions. [2020-10-28 19:25:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 19:25:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:14,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:14,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:25:14,244 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash 900244314, now seen corresponding path program 1 times [2020-10-28 19:25:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:14,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049569967] [2020-10-28 19:25:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:19,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:19,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 19:25:19,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:25:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 19:25:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:19,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-28 19:25:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:20,524 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:25:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:20,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:20,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:20,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:20,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:25:20,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:20,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:20,762 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 19:25:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049569967] [2020-10-28 19:25:20,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:20,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:20,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171981197] [2020-10-28 19:25:20,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:20,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:20,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:20,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:20,765 INFO L87 Difference]: Start difference. First operand 4986 states and 7669 transitions. Second operand 5 states. [2020-10-28 19:25:30,584 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:25:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:33,408 INFO L93 Difference]: Finished difference Result 14757 states and 22673 transitions. [2020-10-28 19:25:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:33,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-10-28 19:25:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:33,456 INFO L225 Difference]: With dead ends: 14757 [2020-10-28 19:25:33,457 INFO L226 Difference]: Without dead ends: 9791 [2020-10-28 19:25:33,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2020-10-28 19:25:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 9506. [2020-10-28 19:25:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9506 states. [2020-10-28 19:25:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9506 states to 9506 states and 14577 transitions. [2020-10-28 19:25:33,870 INFO L78 Accepts]: Start accepts. Automaton has 9506 states and 14577 transitions. Word has length 330 [2020-10-28 19:25:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:33,870 INFO L481 AbstractCegarLoop]: Abstraction has 9506 states and 14577 transitions. [2020-10-28 19:25:33,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 9506 states and 14577 transitions. [2020-10-28 19:25:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 19:25:33,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:33,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:33,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:25:33,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 510486629, now seen corresponding path program 1 times [2020-10-28 19:25:33,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:33,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655685145] [2020-10-28 19:25:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:35,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:38,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:38,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-28 19:25:38,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:40,045 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:25:40,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:40,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:40,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:40,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:40,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:40,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655685145] [2020-10-28 19:25:40,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:40,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536408353] [2020-10-28 19:25:40,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:40,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:40,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:40,253 INFO L87 Difference]: Start difference. First operand 9506 states and 14577 transitions. Second operand 5 states. [2020-10-28 19:25:49,230 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:25:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:51,903 INFO L93 Difference]: Finished difference Result 28114 states and 43049 transitions. [2020-10-28 19:25:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:51,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-10-28 19:25:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:51,966 INFO L225 Difference]: With dead ends: 28114 [2020-10-28 19:25:51,966 INFO L226 Difference]: Without dead ends: 18626 [2020-10-28 19:25:51,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2020-10-28 19:25:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 18373. [2020-10-28 19:25:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18373 states. [2020-10-28 19:25:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18373 states to 18373 states and 27994 transitions. [2020-10-28 19:25:52,789 INFO L78 Accepts]: Start accepts. Automaton has 18373 states and 27994 transitions. Word has length 332 [2020-10-28 19:25:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:52,789 INFO L481 AbstractCegarLoop]: Abstraction has 18373 states and 27994 transitions. [2020-10-28 19:25:52,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 18373 states and 27994 transitions. [2020-10-28 19:25:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 19:25:52,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:52,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:52,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:25:52,830 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:52,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1258590834, now seen corresponding path program 1 times [2020-10-28 19:25:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:52,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693014885] [2020-10-28 19:25:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:58,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 19:25:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:25:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-28 19:25:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:59,161 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:25:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:59,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:59,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:59,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:59,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:25:59,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:59,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:59,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:59,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:59,524 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 19:25:59,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693014885] [2020-10-28 19:25:59,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:59,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:59,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994797446] [2020-10-28 19:25:59,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:59,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:59,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:59,526 INFO L87 Difference]: Start difference. First operand 18373 states and 27994 transitions. Second operand 5 states. [2020-10-28 19:26:10,220 WARN L193 SmtUtils]: Spent 899.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:26:12,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:12,446 INFO L93 Difference]: Finished difference Result 53836 states and 81781 transitions. [2020-10-28 19:26:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:12,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-28 19:26:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:12,527 INFO L225 Difference]: With dead ends: 53836 [2020-10-28 19:26:12,528 INFO L226 Difference]: Without dead ends: 35955 [2020-10-28 19:26:12,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35955 states. [2020-10-28 19:26:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35955 to 35718. [2020-10-28 19:26:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35718 states. [2020-10-28 19:26:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35718 states to 35718 states and 54029 transitions. [2020-10-28 19:26:14,054 INFO L78 Accepts]: Start accepts. Automaton has 35718 states and 54029 transitions. Word has length 334 [2020-10-28 19:26:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:14,055 INFO L481 AbstractCegarLoop]: Abstraction has 35718 states and 54029 transitions. [2020-10-28 19:26:14,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 35718 states and 54029 transitions. [2020-10-28 19:26:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-28 19:26:14,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:14,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:14,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:26:14,115 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:14,116 INFO L82 PathProgramCache]: Analyzing trace with hash -129780879, now seen corresponding path program 1 times [2020-10-28 19:26:14,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:14,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025004667] [2020-10-28 19:26:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:14,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:15,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:19,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:19,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-28 19:26:19,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:26:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:26:19,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:20,253 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:26:20,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:20,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:20,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:20,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:20,423 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 19:26:20,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025004667] [2020-10-28 19:26:20,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:20,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:20,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747395989] [2020-10-28 19:26:20,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:20,426 INFO L87 Difference]: Start difference. First operand 35718 states and 54029 transitions. Second operand 5 states. [2020-10-28 19:26:31,837 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:26:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:35,512 INFO L93 Difference]: Finished difference Result 105112 states and 158633 transitions. [2020-10-28 19:26:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:35,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-10-28 19:26:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:35,659 INFO L225 Difference]: With dead ends: 105112 [2020-10-28 19:26:35,659 INFO L226 Difference]: Without dead ends: 69815 [2020-10-28 19:26:35,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69815 states. [2020-10-28 19:26:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69815 to 69442. [2020-10-28 19:26:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69442 states. [2020-10-28 19:26:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69442 states to 69442 states and 104329 transitions. [2020-10-28 19:26:39,386 INFO L78 Accepts]: Start accepts. Automaton has 69442 states and 104329 transitions. Word has length 336 [2020-10-28 19:26:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:39,387 INFO L481 AbstractCegarLoop]: Abstraction has 69442 states and 104329 transitions. [2020-10-28 19:26:39,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 69442 states and 104329 transitions. [2020-10-28 19:26:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-28 19:26:39,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:39,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:39,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:26:39,447 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:39,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:39,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1694508891, now seen corresponding path program 1 times [2020-10-28 19:26:39,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:39,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074454663] [2020-10-28 19:26:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:39,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:40,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:42,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:44,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:44,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 19:26:44,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:45,523 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:26:45,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:45,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:45,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:45,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:45,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:45,717 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 19:26:45,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074454663] [2020-10-28 19:26:45,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:45,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115052007] [2020-10-28 19:26:45,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:45,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:45,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:45,719 INFO L87 Difference]: Start difference. First operand 69442 states and 104329 transitions. Second operand 5 states. [2020-10-28 19:27:00,041 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:27:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:05,713 INFO L93 Difference]: Finished difference Result 204485 states and 306465 transitions. [2020-10-28 19:27:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:05,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2020-10-28 19:27:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:05,928 INFO L225 Difference]: With dead ends: 204485 [2020-10-28 19:27:05,929 INFO L226 Difference]: Without dead ends: 135944 [2020-10-28 19:27:06,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135944 states. [2020-10-28 19:27:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135944 to 135859. [2020-10-28 19:27:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135859 states. [2020-10-28 19:27:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135859 states to 135859 states and 202437 transitions. [2020-10-28 19:27:13,952 INFO L78 Accepts]: Start accepts. Automaton has 135859 states and 202437 transitions. Word has length 338 [2020-10-28 19:27:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:13,953 INFO L481 AbstractCegarLoop]: Abstraction has 135859 states and 202437 transitions. [2020-10-28 19:27:13,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 135859 states and 202437 transitions. [2020-10-28 19:27:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-28 19:27:14,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:14,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:14,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:27:14,086 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:14,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1547676641, now seen corresponding path program 1 times [2020-10-28 19:27:14,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:14,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173241993] [2020-10-28 19:27:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:19,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:19,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 348 [2020-10-28 19:27:19,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:27:19,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 19:27:19,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:20,209 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 19:27:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:20,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:20,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:20,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:27:20,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:20,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:20,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:20,396 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 19:27:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173241993] [2020-10-28 19:27:20,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:20,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319706250] [2020-10-28 19:27:20,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:20,399 INFO L87 Difference]: Start difference. First operand 135859 states and 202437 transitions. Second operand 4 states. [2020-10-28 19:27:40,514 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 19:27:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:48,068 INFO L93 Difference]: Finished difference Result 399821 states and 594333 transitions. [2020-10-28 19:27:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:27:48,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-10-28 19:27:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:48,477 INFO L225 Difference]: With dead ends: 399821 [2020-10-28 19:27:48,478 INFO L226 Difference]: Without dead ends: 265744 [2020-10-28 19:27:48,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265744 states.