/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:22:58,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:22:58,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:22:59,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:22:59,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:22:59,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:22:59,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:22:59,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:22:59,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:22:59,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:22:59,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:22:59,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:22:59,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:22:59,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:22:59,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:22:59,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:22:59,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:22:59,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:22:59,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:22:59,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:22:59,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:22:59,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:22:59,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:22:59,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:22:59,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:22:59,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:22:59,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:22:59,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:22:59,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:22:59,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:22:59,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:22:59,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:22:59,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:22:59,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:22:59,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:22:59,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:22:59,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:22:59,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:22:59,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:22:59,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:22:59,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:22:59,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:22:59,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:22:59,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:22:59,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:22:59,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:22:59,153 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:22:59,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:22:59,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:22:59,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:22:59,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:22:59,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:22:59,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:22:59,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:22:59,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:22:59,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:22:59,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:22:59,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:22:59,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:22:59,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:22:59,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:22:59,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:22:59,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:22:59,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:22:59,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:22:59,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:22:59,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:22:59,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:22:59,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:22:59,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:22:59,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:22:59,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:22:59,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:22:59,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:22:59,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:22:59,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:22:59,635 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:22:59,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 18:22:59,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82b955f41/582e548a4a0041eaa5bd4299bd7f0a65/FLAG2eab4c644 [2020-10-28 18:23:00,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:23:00,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 18:23:00,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82b955f41/582e548a4a0041eaa5bd4299bd7f0a65/FLAG2eab4c644 [2020-10-28 18:23:01,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82b955f41/582e548a4a0041eaa5bd4299bd7f0a65 [2020-10-28 18:23:01,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:23:01,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:23:01,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:23:01,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:23:01,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:23:01,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:23:01" (1/1) ... [2020-10-28 18:23:01,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ade4c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:01, skipping insertion in model container [2020-10-28 18:23:01,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:23:01" (1/1) ... [2020-10-28 18:23:01,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:23:01,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:23:02,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:23:02,922 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:23:03,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:23:03,859 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:23:03,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03 WrapperNode [2020-10-28 18:23:03,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:23:03,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:23:03,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:23:03,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:23:03,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:03,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:03,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:03,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:04,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:04,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:04,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... [2020-10-28 18:23:04,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:23:04,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:23:04,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:23:04,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:23:04,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:23:04,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:23:04,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:23:04,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:23:04,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:23:04,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:23:04,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:23:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:23:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:23:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:23:08,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:23:08,586 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:23:08,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:23:08 BoogieIcfgContainer [2020-10-28 18:23:08,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:23:08,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:23:08,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:23:08,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:23:08,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:23:01" (1/3) ... [2020-10-28 18:23:08,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653e5220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:23:08, skipping insertion in model container [2020-10-28 18:23:08,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:23:03" (2/3) ... [2020-10-28 18:23:08,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653e5220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:23:08, skipping insertion in model container [2020-10-28 18:23:08,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:23:08" (3/3) ... [2020-10-28 18:23:08,599 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 18:23:08,611 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:23:08,617 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:23:08,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:23:08,680 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:23:08,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:23:08,680 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:23:08,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:23:08,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:23:08,681 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:23:08,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:23:08,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:23:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states. [2020-10-28 18:23:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-10-28 18:23:08,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:08,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:23:08,775 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1366298238, now seen corresponding path program 1 times [2020-10-28 18:23:08,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:08,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574557562] [2020-10-28 18:23:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:09,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:11,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:12,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:14,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:14,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 476 [2020-10-28 18:23:14,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:23:14,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5224 [2020-10-28 18:23:14,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:14,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:23:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:23:14,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-28 18:23:14,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:23:16,713 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:23:16,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:16,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:16,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:16,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 18:23:16,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:16,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:16,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:23:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:23:17,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574557562] [2020-10-28 18:23:17,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:17,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:23:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702419763] [2020-10-28 18:23:17,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:23:17,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:23:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:23:17,675 INFO L87 Difference]: Start difference. First operand 1326 states. Second operand 5 states. [2020-10-28 18:23:34,229 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 18:23:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:23:37,125 INFO L93 Difference]: Finished difference Result 3919 states and 7066 transitions. [2020-10-28 18:23:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:23:37,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 468 [2020-10-28 18:23:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:23:37,168 INFO L225 Difference]: With dead ends: 3919 [2020-10-28 18:23:37,168 INFO L226 Difference]: Without dead ends: 2602 [2020-10-28 18:23:37,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:23:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2020-10-28 18:23:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2599. [2020-10-28 18:23:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2599 states. [2020-10-28 18:23:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4270 transitions. [2020-10-28 18:23:37,414 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4270 transitions. Word has length 468 [2020-10-28 18:23:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:23:37,415 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 4270 transitions. [2020-10-28 18:23:37,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:23:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4270 transitions. [2020-10-28 18:23:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-28 18:23:37,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:23:37,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:23:37,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:23:37,450 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:23:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:23:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -965184898, now seen corresponding path program 1 times [2020-10-28 18:23:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:23:37,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646239025] [2020-10-28 18:23:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:23:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:37,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:39,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:40,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:42,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:42,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:42,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-28 18:23:42,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:23:42,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-28 18:23:42,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:42,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:23:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:23:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 333 [2020-10-28 18:23:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:23:44,365 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:23:44,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:23:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:23:44,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:23:44,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:23:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:23:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:23:44,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:23:44,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:23:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:23:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646239025] [2020-10-28 18:23:45,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:23:45,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:23:45,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559509277] [2020-10-28 18:23:45,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:23:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:23:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:23:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:23:45,131 INFO L87 Difference]: Start difference. First operand 2599 states and 4270 transitions. Second operand 4 states. [2020-10-28 18:24:03,315 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 423 [2020-10-28 18:24:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:06,083 INFO L93 Difference]: Finished difference Result 7527 states and 12331 transitions. [2020-10-28 18:24:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:24:06,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-10-28 18:24:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:06,113 INFO L225 Difference]: With dead ends: 7527 [2020-10-28 18:24:06,113 INFO L226 Difference]: Without dead ends: 5142 [2020-10-28 18:24:06,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2020-10-28 18:24:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 5139. [2020-10-28 18:24:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5139 states. [2020-10-28 18:24:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 8418 transitions. [2020-10-28 18:24:06,346 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 8418 transitions. Word has length 470 [2020-10-28 18:24:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:06,346 INFO L481 AbstractCegarLoop]: Abstraction has 5139 states and 8418 transitions. [2020-10-28 18:24:06,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:24:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 8418 transitions. [2020-10-28 18:24:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-10-28 18:24:06,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:06,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:24:06,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:24:06,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash -478745588, now seen corresponding path program 1 times [2020-10-28 18:24:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:06,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062234540] [2020-10-28 18:24:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:06,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:06,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:07,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:08,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:08,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:10,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:11,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:11,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:11,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 479 [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:11,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:24:11,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:24:11,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 300 [2020-10-28 18:24:11,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:13,057 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:24:13,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:13,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:24:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062234540] [2020-10-28 18:24:13,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:13,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:24:13,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80361501] [2020-10-28 18:24:13,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:24:13,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:24:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:24:13,622 INFO L87 Difference]: Start difference. First operand 5139 states and 8418 transitions. Second operand 4 states. [2020-10-28 18:24:31,061 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 423 [2020-10-28 18:24:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:33,930 INFO L93 Difference]: Finished difference Result 14831 states and 24201 transitions. [2020-10-28 18:24:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:24:33,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-10-28 18:24:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:33,983 INFO L225 Difference]: With dead ends: 14831 [2020-10-28 18:24:33,984 INFO L226 Difference]: Without dead ends: 10044 [2020-10-28 18:24:33,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10044 states. [2020-10-28 18:24:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10044 to 10041. [2020-10-28 18:24:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10041 states. [2020-10-28 18:24:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10041 states to 10041 states and 16364 transitions. [2020-10-28 18:24:34,417 INFO L78 Accepts]: Start accepts. Automaton has 10041 states and 16364 transitions. Word has length 471 [2020-10-28 18:24:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:34,418 INFO L481 AbstractCegarLoop]: Abstraction has 10041 states and 16364 transitions. [2020-10-28 18:24:34,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:24:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10041 states and 16364 transitions. [2020-10-28 18:24:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-10-28 18:24:34,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:34,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:24:34,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:24:34,444 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:34,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1879425647, now seen corresponding path program 1 times [2020-10-28 18:24:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:34,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571637115] [2020-10-28 18:24:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:34,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:37,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:37,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:39,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:39,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 479 [2020-10-28 18:24:39,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:24:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-28 18:24:39,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:41,264 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:24:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:41,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:41,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:41,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 18:24:41,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:41,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:41,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:24:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:24:41,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571637115] [2020-10-28 18:24:41,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:24:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15379633] [2020-10-28 18:24:41,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:24:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:24:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:41,704 INFO L87 Difference]: Start difference. First operand 10041 states and 16364 transitions. Second operand 5 states. [2020-10-28 18:24:57,785 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 18:25:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:01,128 INFO L93 Difference]: Finished difference Result 29463 states and 47927 transitions. [2020-10-28 18:25:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:25:01,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 471 [2020-10-28 18:25:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:01,278 INFO L225 Difference]: With dead ends: 29463 [2020-10-28 18:25:01,278 INFO L226 Difference]: Without dead ends: 19636 [2020-10-28 18:25:01,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:25:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19636 states. [2020-10-28 18:25:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19636 to 19633. [2020-10-28 18:25:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19633 states. [2020-10-28 18:25:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19633 states to 19633 states and 31814 transitions. [2020-10-28 18:25:02,467 INFO L78 Accepts]: Start accepts. Automaton has 19633 states and 31814 transitions. Word has length 471 [2020-10-28 18:25:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:02,467 INFO L481 AbstractCegarLoop]: Abstraction has 19633 states and 31814 transitions. [2020-10-28 18:25:02,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:25:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19633 states and 31814 transitions. [2020-10-28 18:25:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-28 18:25:02,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:02,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:25:02,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:25:02,521 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash -31941314, now seen corresponding path program 1 times [2020-10-28 18:25:02,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:02,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084222223] [2020-10-28 18:25:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:02,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:03,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:06,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:06,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:06,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:07,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-10-28 18:25:07,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:25:07,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-28 18:25:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:09,166 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:25:09,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:09,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:09,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:09,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:25:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084222223] [2020-10-28 18:25:09,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:09,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:25:09,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942307971] [2020-10-28 18:25:09,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:25:09,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:25:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:09,604 INFO L87 Difference]: Start difference. First operand 19633 states and 31814 transitions. Second operand 5 states. [2020-10-28 18:25:26,057 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 18:25:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:29,399 INFO L93 Difference]: Finished difference Result 58154 states and 94155 transitions. [2020-10-28 18:25:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:25:29,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-10-28 18:25:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:29,504 INFO L225 Difference]: With dead ends: 58154 [2020-10-28 18:25:29,504 INFO L226 Difference]: Without dead ends: 38589 [2020-10-28 18:25:29,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:25:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38589 states. [2020-10-28 18:25:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38589 to 38586. [2020-10-28 18:25:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38586 states. [2020-10-28 18:25:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38586 states to 38586 states and 62170 transitions. [2020-10-28 18:25:31,431 INFO L78 Accepts]: Start accepts. Automaton has 38586 states and 62170 transitions. Word has length 474 [2020-10-28 18:25:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:31,431 INFO L481 AbstractCegarLoop]: Abstraction has 38586 states and 62170 transitions. [2020-10-28 18:25:31,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:25:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38586 states and 62170 transitions. [2020-10-28 18:25:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-28 18:25:31,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:31,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:25:31,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:25:31,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1494885006, now seen corresponding path program 1 times [2020-10-28 18:25:31,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:31,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401120826] [2020-10-28 18:25:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:31,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:33,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:36,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:36,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-28 18:25:36,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-28 18:25:36,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:38,227 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:25:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:38,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:38,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:38,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:25:38,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401120826] [2020-10-28 18:25:38,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:38,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:25:38,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741506318] [2020-10-28 18:25:38,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:25:38,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:25:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:38,599 INFO L87 Difference]: Start difference. First operand 38586 states and 62170 transitions. Second operand 5 states. [2020-10-28 18:25:58,052 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 18:26:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:02,146 INFO L93 Difference]: Finished difference Result 113808 states and 183174 transitions. [2020-10-28 18:26:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:26:02,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-10-28 18:26:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:02,321 INFO L225 Difference]: With dead ends: 113808 [2020-10-28 18:26:02,322 INFO L226 Difference]: Without dead ends: 76077 [2020-10-28 18:26:02,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:26:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76077 states. [2020-10-28 18:26:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76077 to 76074. [2020-10-28 18:26:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76074 states. [2020-10-28 18:26:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76074 states to 76074 states and 122006 transitions. [2020-10-28 18:26:07,100 INFO L78 Accepts]: Start accepts. Automaton has 76074 states and 122006 transitions. Word has length 477 [2020-10-28 18:26:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:07,101 INFO L481 AbstractCegarLoop]: Abstraction has 76074 states and 122006 transitions. [2020-10-28 18:26:07,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:26:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 76074 states and 122006 transitions. [2020-10-28 18:26:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-28 18:26:07,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:07,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:07,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:26:07,194 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:07,194 INFO L82 PathProgramCache]: Analyzing trace with hash 516503438, now seen corresponding path program 1 times [2020-10-28 18:26:07,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:07,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216675147] [2020-10-28 18:26:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:07,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:11,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:12,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 487 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 284 [2020-10-28 18:26:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:13,798 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:26:13,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:13,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:13,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:13,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:13,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:13,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:26:13,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:13,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:14,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216675147] [2020-10-28 18:26:14,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:14,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:26:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937351487] [2020-10-28 18:26:14,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:26:14,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:14,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:26:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:26:14,166 INFO L87 Difference]: Start difference. First operand 76074 states and 122006 transitions. Second operand 4 states.