/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:03:18,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:03:18,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:03:18,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:03:18,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:03:18,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:03:18,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:03:18,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:03:18,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:03:18,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:03:18,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:03:18,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:03:18,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:03:18,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:03:18,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:03:18,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:03:18,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:03:18,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:03:18,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:03:18,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:03:18,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:03:18,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:03:18,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:03:18,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:03:19,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:03:19,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:03:19,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:03:19,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:03:19,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:03:19,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:03:19,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:03:19,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:03:19,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:03:19,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:03:19,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:03:19,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:03:19,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:03:19,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:03:19,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:03:19,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:03:19,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:03:19,042 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 [2020-10-29 14:03:19,098 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:03:19,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:03:19,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:03:19,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:03:19,102 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:03:19,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:03:19,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:03:19,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:03:19,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:03:19,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:03:19,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:03:19,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:03:19,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:03:19,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:03:19,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:03:19,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:03:19,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:03:19,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:03:19,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:03:19,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:03:19,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:03:19,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:03:19,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:03:19,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:03:19,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:03:19,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:03:19,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:03:19,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:03:19,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:03:19,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:03:19,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:03:19,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:03:19,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:03:19,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:03:19,576 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:03:19,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 14:03:19,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6feb4a9/6628a3d0368a4af197b1f9adb5cc437e/FLAG2cbe9ec1b [2020-10-29 14:03:20,588 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:03:20,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 14:03:20,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6feb4a9/6628a3d0368a4af197b1f9adb5cc437e/FLAG2cbe9ec1b [2020-10-29 14:03:20,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df6feb4a9/6628a3d0368a4af197b1f9adb5cc437e [2020-10-29 14:03:20,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:03:20,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:03:20,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:03:20,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:03:20,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:03:20,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:03:20" (1/1) ... [2020-10-29 14:03:20,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33743a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:20, skipping insertion in model container [2020-10-29 14:03:20,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:03:20" (1/1) ... [2020-10-29 14:03:20,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:03:20,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:03:22,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:03:22,364 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:03:23,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:03:23,201 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:03:23,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23 WrapperNode [2020-10-29 14:03:23,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:03:23,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:03:23,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:03:23,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:03:23,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (1/1) ... [2020-10-29 14:03:23,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:03:23,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:03:23,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:03:23,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:03:23,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (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 [2020-10-29 14:03:23,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:03:23,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:03:23,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:03:23,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:03:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:03:23,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:03:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:03:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:03:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:03:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:03:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 14:03:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:03:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:03:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:03:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:03:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:03:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:03:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:03:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:03:26,827 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:03:26,827 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:03:26,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:03:26 BoogieIcfgContainer [2020-10-29 14:03:26,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:03:26,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:03:26,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:03:26,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:03:26,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:03:20" (1/3) ... [2020-10-29 14:03:26,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f674cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:03:26, skipping insertion in model container [2020-10-29 14:03:26,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:03:23" (2/3) ... [2020-10-29 14:03:26,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f674cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:03:26, skipping insertion in model container [2020-10-29 14:03:26,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:03:26" (3/3) ... [2020-10-29 14:03:26,839 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 14:03:26,852 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:03:26,858 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:03:26,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:03:26,908 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:03:26,908 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:03:26,908 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:03:26,908 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:03:26,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:03:26,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:03:26,909 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:03:26,909 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:03:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states. [2020-10-29 14:03:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 14:03:26,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:26,983 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] [2020-10-29 14:03:26,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2121080999, now seen corresponding path program 1 times [2020-10-29 14:03:27,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:27,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934614864] [2020-10-29 14:03:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:27,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:28,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:29,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:30,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:30,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:32,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:32,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 14:03:32,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:03:32,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-29 14:03:32,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:32,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:03:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-29 14:03:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-29 14:03:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 14:03:33,877 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:03:33,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:33,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:33,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:33,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:33,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:33,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 14:03:33,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:33,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:33,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:33,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:03:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934614864] [2020-10-29 14:03:34,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:34,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:03:34,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646833418] [2020-10-29 14:03:34,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:03:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:34,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:03:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:03:34,202 INFO L87 Difference]: Start difference. First operand 1008 states. Second operand 4 states. [2020-10-29 14:03:35,140 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 14:03:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:44,136 INFO L93 Difference]: Finished difference Result 1765 states and 3140 transitions. [2020-10-29 14:03:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:03:44,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 14:03:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:44,206 INFO L225 Difference]: With dead ends: 1765 [2020-10-29 14:03:44,208 INFO L226 Difference]: Without dead ends: 1448 [2020-10-29 14:03:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2020-10-29 14:03:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1445. [2020-10-29 14:03:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1445 states. [2020-10-29 14:03:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2236 transitions. [2020-10-29 14:03:44,372 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2236 transitions. Word has length 313 [2020-10-29 14:03:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:44,374 INFO L481 AbstractCegarLoop]: Abstraction has 1445 states and 2236 transitions. [2020-10-29 14:03:44,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:03:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2236 transitions. [2020-10-29 14:03:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 14:03:44,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:44,382 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] [2020-10-29 14:03:44,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:03:44,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1181886287, now seen corresponding path program 1 times [2020-10-29 14:03:44,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:44,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923126201] [2020-10-29 14:03:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:45,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:47,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:49,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:49,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 14:03:49,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:03:49,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-29 14:03:49,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:49,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:03:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 14:03:49,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-29 14:03:49,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 14:03:50,901 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:03:50,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:50,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:50,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:50,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 14:03:50,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:50,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:50,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:50,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:03:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:51,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923126201] [2020-10-29 14:03:51,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:51,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:03:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504867308] [2020-10-29 14:03:51,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:03:51,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:03:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:03:51,186 INFO L87 Difference]: Start difference. First operand 1445 states and 2236 transitions. Second operand 4 states. [2020-10-29 14:03:52,201 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 14:03:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:59,810 INFO L93 Difference]: Finished difference Result 2792 states and 4356 transitions. [2020-10-29 14:03:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:03:59,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 14:03:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:59,826 INFO L225 Difference]: With dead ends: 2792 [2020-10-29 14:03:59,826 INFO L226 Difference]: Without dead ends: 2360 [2020-10-29 14:03:59,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2020-10-29 14:03:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2357. [2020-10-29 14:03:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2020-10-29 14:03:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3654 transitions. [2020-10-29 14:03:59,935 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3654 transitions. Word has length 313 [2020-10-29 14:03:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:59,936 INFO L481 AbstractCegarLoop]: Abstraction has 2357 states and 3654 transitions. [2020-10-29 14:03:59,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:03:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3654 transitions. [2020-10-29 14:03:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 14:03:59,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:59,947 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] [2020-10-29 14:03:59,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:03:59,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2078679615, now seen corresponding path program 1 times [2020-10-29 14:03:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:59,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710100659] [2020-10-29 14:03:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:00,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:00,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:00,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:01,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:04,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:05,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:05,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 14:04:05,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:04:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 14:04:05,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:05,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:04:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-29 14:04:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-29 14:04:05,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:04:06,117 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:04:06,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:06,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:06,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:06,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:06,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:06,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:04:06,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:06,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:06,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:06,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710100659] [2020-10-29 14:04:06,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:06,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:04:06,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824374270] [2020-10-29 14:04:06,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:04:06,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:04:06,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:04:06,442 INFO L87 Difference]: Start difference. First operand 2357 states and 3654 transitions. Second operand 4 states. [2020-10-29 14:04:07,335 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 14:04:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:14,454 INFO L93 Difference]: Finished difference Result 4902 states and 7677 transitions. [2020-10-29 14:04:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:04:14,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 14:04:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:14,484 INFO L225 Difference]: With dead ends: 4902 [2020-10-29 14:04:14,485 INFO L226 Difference]: Without dead ends: 4188 [2020-10-29 14:04:14,488 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 [2020-10-29 14:04:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2020-10-29 14:04:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 4185. [2020-10-29 14:04:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4185 states. [2020-10-29 14:04:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6494 transitions. [2020-10-29 14:04:14,673 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6494 transitions. Word has length 313 [2020-10-29 14:04:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:14,674 INFO L481 AbstractCegarLoop]: Abstraction has 4185 states and 6494 transitions. [2020-10-29 14:04:14,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:04:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6494 transitions. [2020-10-29 14:04:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 14:04:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:14,686 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] [2020-10-29 14:04:14,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:04:14,686 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash 406301470, now seen corresponding path program 1 times [2020-10-29 14:04:14,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:14,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487712224] [2020-10-29 14:04:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:14,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:19,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 14:04:19,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:04:19,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 14:04:19,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:19,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:19,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:04:19,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-29 14:04:19,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-29 14:04:19,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:04:20,863 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:04:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:20,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:20,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:20,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:20,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:20,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 14:04:20,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:20,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:20,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:20,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:20,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:20,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:04:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:21,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487712224] [2020-10-29 14:04:21,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:21,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:04:21,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915657436] [2020-10-29 14:04:21,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:04:21,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:04:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:04:21,086 INFO L87 Difference]: Start difference. First operand 4185 states and 6494 transitions. Second operand 4 states. [2020-10-29 14:04:22,073 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 14:04:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:29,031 INFO L93 Difference]: Finished difference Result 9130 states and 14325 transitions. [2020-10-29 14:04:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:04:29,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 313 [2020-10-29 14:04:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:29,072 INFO L225 Difference]: With dead ends: 9130 [2020-10-29 14:04:29,072 INFO L226 Difference]: Without dead ends: 7852 [2020-10-29 14:04:29,078 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 [2020-10-29 14:04:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2020-10-29 14:04:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7849. [2020-10-29 14:04:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7849 states. [2020-10-29 14:04:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 12182 transitions. [2020-10-29 14:04:29,361 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 12182 transitions. Word has length 313 [2020-10-29 14:04:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:29,362 INFO L481 AbstractCegarLoop]: Abstraction has 7849 states and 12182 transitions. [2020-10-29 14:04:29,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:04:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 12182 transitions. [2020-10-29 14:04:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-29 14:04:29,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:29,384 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] [2020-10-29 14:04:29,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:04:29,384 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 395804405, now seen corresponding path program 1 times [2020-10-29 14:04:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:29,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415832897] [2020-10-29 14:04:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:29,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:34,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:34,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-29 14:04:34,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:04:34,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 14:04:34,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:34,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:34,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:34,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:04:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-29 14:04:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:35,730 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:04:35,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:35,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:35,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:35,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:35,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:04:35,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:35,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:35,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:35,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:35,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 14:04:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415832897] [2020-10-29 14:04:35,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:35,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058133006] [2020-10-29 14:04:35,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:35,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:35,963 INFO L87 Difference]: Start difference. First operand 7849 states and 12182 transitions. Second operand 5 states. [2020-10-29 14:04:45,110 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:04:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:47,917 INFO L93 Difference]: Finished difference Result 23180 states and 35929 transitions. [2020-10-29 14:04:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:04:47,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-10-29 14:04:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:47,999 INFO L225 Difference]: With dead ends: 23180 [2020-10-29 14:04:47,999 INFO L226 Difference]: Without dead ends: 15384 [2020-10-29 14:04:48,017 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 [2020-10-29 14:04:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2020-10-29 14:04:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 15183. [2020-10-29 14:04:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15183 states. [2020-10-29 14:04:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15183 states to 15183 states and 23455 transitions. [2020-10-29 14:04:48,573 INFO L78 Accepts]: Start accepts. Automaton has 15183 states and 23455 transitions. Word has length 313 [2020-10-29 14:04:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:48,574 INFO L481 AbstractCegarLoop]: Abstraction has 15183 states and 23455 transitions. [2020-10-29 14:04:48,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15183 states and 23455 transitions. [2020-10-29 14:04:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-29 14:04:48,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:48,606 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] [2020-10-29 14:04:48,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:04:48,606 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2021019247, now seen corresponding path program 1 times [2020-10-29 14:04:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:48,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515182263] [2020-10-29 14:04:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:53,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:53,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:04:53,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 14:04:53,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:54,716 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:04:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:54,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:54,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:54,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515182263] [2020-10-29 14:04:54,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:54,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967236691] [2020-10-29 14:04:54,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:54,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:54,880 INFO L87 Difference]: Start difference. First operand 15183 states and 23455 transitions. Second operand 5 states. [2020-10-29 14:05:03,905 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:05:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:07,036 INFO L93 Difference]: Finished difference Result 44859 states and 69204 transitions. [2020-10-29 14:05:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:05:07,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-29 14:05:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:07,112 INFO L225 Difference]: With dead ends: 44859 [2020-10-29 14:05:07,113 INFO L226 Difference]: Without dead ends: 29735 [2020-10-29 14:05:07,152 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 [2020-10-29 14:05:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29735 states. [2020-10-29 14:05:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29735 to 29578. [2020-10-29 14:05:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29578 states. [2020-10-29 14:05:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29578 states to 29578 states and 45426 transitions. [2020-10-29 14:05:08,321 INFO L78 Accepts]: Start accepts. Automaton has 29578 states and 45426 transitions. Word has length 315 [2020-10-29 14:05:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:08,322 INFO L481 AbstractCegarLoop]: Abstraction has 29578 states and 45426 transitions. [2020-10-29 14:05:08,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:05:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 29578 states and 45426 transitions. [2020-10-29 14:05:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 14:05:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:08,376 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] [2020-10-29 14:05:08,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:05:08,376 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1765820724, now seen corresponding path program 1 times [2020-10-29 14:05:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:08,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038634900] [2020-10-29 14:05:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:13,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-29 14:05:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:14,448 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:05:14,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:14,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:14,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:05:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:05:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:14,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038634900] [2020-10-29 14:05:14,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:14,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:05:14,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912123375] [2020-10-29 14:05:14,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:05:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:05:14,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:05:14,598 INFO L87 Difference]: Start difference. First operand 29578 states and 45426 transitions. Second operand 4 states. [2020-10-29 14:05:25,355 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-29 14:05:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:28,390 INFO L93 Difference]: Finished difference Result 87135 states and 133568 transitions. [2020-10-29 14:05:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:05:28,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-29 14:05:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:28,515 INFO L225 Difference]: With dead ends: 87135 [2020-10-29 14:05:28,515 INFO L226 Difference]: Without dead ends: 57793 [2020-10-29 14:05:28,582 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 [2020-10-29 14:05:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57793 states. [2020-10-29 14:05:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57793 to 57552. [2020-10-29 14:05:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57552 states. [2020-10-29 14:05:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57552 states to 57552 states and 87814 transitions. [2020-10-29 14:05:31,062 INFO L78 Accepts]: Start accepts. Automaton has 57552 states and 87814 transitions. Word has length 317 [2020-10-29 14:05:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:31,063 INFO L481 AbstractCegarLoop]: Abstraction has 57552 states and 87814 transitions. [2020-10-29 14:05:31,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:05:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57552 states and 87814 transitions. [2020-10-29 14:05:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-29 14:05:31,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:31,155 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] [2020-10-29 14:05:31,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:05:31,155 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:31,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1692377, now seen corresponding path program 1 times [2020-10-29 14:05:31,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:31,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892033325] [2020-10-29 14:05:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:31,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:31,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:31,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:36,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:36,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-29 14:05:36,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:05:36,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 14:05:36,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:36,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:05:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:05:36,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 14:05:36,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:37,434 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:05:37,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:37,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:37,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:37,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:37,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:37,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:05:37,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892033325] [2020-10-29 14:05:37,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:37,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:05:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258918114] [2020-10-29 14:05:37,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:05:37,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:05:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:05:37,570 INFO L87 Difference]: Start difference. First operand 57552 states and 87814 transitions. Second operand 5 states. [2020-10-29 14:05:48,040 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:05:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:52,290 INFO L93 Difference]: Finished difference Result 170047 states and 259065 transitions. [2020-10-29 14:05:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:05:52,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-29 14:05:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:52,581 INFO L225 Difference]: With dead ends: 170047 [2020-10-29 14:05:52,581 INFO L226 Difference]: Without dead ends: 112638 [2020-10-29 14:05:52,680 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 [2020-10-29 14:05:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112638 states. [2020-10-29 14:05:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112638 to 112397. [2020-10-29 14:05:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112397 states. [2020-10-29 14:05:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112397 states to 112397 states and 170345 transitions. [2020-10-29 14:05:57,667 INFO L78 Accepts]: Start accepts. Automaton has 112397 states and 170345 transitions. Word has length 317 [2020-10-29 14:05:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:57,668 INFO L481 AbstractCegarLoop]: Abstraction has 112397 states and 170345 transitions. [2020-10-29 14:05:57,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:05:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 112397 states and 170345 transitions. [2020-10-29 14:05:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-29 14:05:57,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:57,779 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] [2020-10-29 14:05:57,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:05:57,780 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -962672652, now seen corresponding path program 1 times [2020-10-29 14:05:57,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:57,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813225009] [2020-10-29 14:05:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:58,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:03,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-29 14:06:03,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:06:03,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 14:06:03,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:03,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:06:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:06:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-29 14:06:03,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:06:04,306 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 14:06:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:06:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:04,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:04,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:06:04,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:06:04,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:06:04,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:04,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:06:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:06:04,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:06:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:06:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:06:04,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813225009] [2020-10-29 14:06:04,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:06:04,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:06:04,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621828598] [2020-10-29 14:06:04,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:06:04,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:06:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:06:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:06:04,542 INFO L87 Difference]: Start difference. First operand 112397 states and 170345 transitions. Second operand 5 states. [2020-10-29 14:06:20,232 WARN L193 SmtUtils]: Spent 994.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 14:06:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:06:26,810 INFO L93 Difference]: Finished difference Result 331734 states and 501902 transitions. [2020-10-29 14:06:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:06:26,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-29 14:06:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:06:27,390 INFO L225 Difference]: With dead ends: 331734 [2020-10-29 14:06:27,390 INFO L226 Difference]: Without dead ends: 219981 [2020-10-29 14:06:27,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:06:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219981 states. [2020-10-29 14:06:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219981 to 219812. [2020-10-29 14:06:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219812 states. [2020-10-29 14:06:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219812 states to 219812 states and 330754 transitions. [2020-10-29 14:06:39,322 INFO L78 Accepts]: Start accepts. Automaton has 219812 states and 330754 transitions. Word has length 319 [2020-10-29 14:06:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:06:39,322 INFO L481 AbstractCegarLoop]: Abstraction has 219812 states and 330754 transitions. [2020-10-29 14:06:39,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:06:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 219812 states and 330754 transitions. [2020-10-29 14:06:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-29 14:06:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:39,571 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] [2020-10-29 14:06:39,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:06:39,572 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -473064292, now seen corresponding path program 1 times [2020-10-29 14:06:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:39,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856322510] [2020-10-29 14:06:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:39,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:40,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:40,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:43,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking...