/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:32:25,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:32:25,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:32:25,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:32:25,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:32:25,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:32:25,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:32:25,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:32:25,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:32:25,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:32:25,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:32:25,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:32:25,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:32:25,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:32:25,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:32:25,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:32:25,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:32:25,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:32:25,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:32:25,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:32:25,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:32:25,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:32:25,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:32:25,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:32:25,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:32:25,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:32:25,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:32:25,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:32:25,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:32:25,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:32:25,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:32:25,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:32:25,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:32:25,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:32:25,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:32:25,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:32:25,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:32:25,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:32:25,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:32:25,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:32:25,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:32:25,721 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 [2020-10-27 23:32:25,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:32:25,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:32:25,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:32:25,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:32:25,752 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:32:25,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:32:25,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:32:25,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:32:25,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:32:25,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:32:25,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:32:25,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:32:25,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:32:25,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:32:25,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:32:25,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:32:25,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:32:25,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:32:25,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:32:25,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:32:25,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:32:25,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:32:25,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:32:25,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:32:25,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:32:25,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:32:25,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:32:25,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:32:25,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:32:25,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:32:26,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:32:26,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:32:26,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:32:26,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:32:26,183 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:32:26,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:32:26,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8936e9c8/5e142b98a5ca45708fecda7a3d8b8fe3/FLAG158e6a315 [2020-10-27 23:32:27,126 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:32:27,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:32:27,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8936e9c8/5e142b98a5ca45708fecda7a3d8b8fe3/FLAG158e6a315 [2020-10-27 23:32:27,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8936e9c8/5e142b98a5ca45708fecda7a3d8b8fe3 [2020-10-27 23:32:27,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:32:27,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:32:27,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:32:27,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:32:27,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:32:27,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:32:27" (1/1) ... [2020-10-27 23:32:27,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678de6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:27, skipping insertion in model container [2020-10-27 23:32:27,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:32:27" (1/1) ... [2020-10-27 23:32:27,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:32:27,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:32:28,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:32:28,502 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:32:28,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:32:28,891 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:32:28,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28 WrapperNode [2020-10-27 23:32:28,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:32:28,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:32:28,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:32:28,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:32:28,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:28,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:28,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:28,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:28,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:29,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:29,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (1/1) ... [2020-10-27 23:32:29,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:32:29,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:32:29,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:32:29,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:32:29,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (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 [2020-10-27 23:32:29,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:32:29,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:32:29,184 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:32:29,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:32:29,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:32:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:32:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:32:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:32:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:32:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:32:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:32:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:32:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:32:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:32:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:32:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:32:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:32:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:32:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:32:29,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:32:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:32:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:32:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:32:29,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:32:31,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:32:31,950 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:32:31,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:32:31 BoogieIcfgContainer [2020-10-27 23:32:31,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:32:31,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:32:31,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:32:31,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:32:31,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:32:27" (1/3) ... [2020-10-27 23:32:31,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4a244e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:32:31, skipping insertion in model container [2020-10-27 23:32:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:32:28" (2/3) ... [2020-10-27 23:32:31,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4a244e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:32:31, skipping insertion in model container [2020-10-27 23:32:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:32:31" (3/3) ... [2020-10-27 23:32:31,963 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:32:31,975 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:32:31,981 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:32:31,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:32:32,030 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:32:32,030 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:32:32,030 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:32:32,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:32:32,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:32:32,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:32:32,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:32:32,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:32:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states. [2020-10-27 23:32:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 23:32:32,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:32,099 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] [2020-10-27 23:32:32,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:32,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1502225452, now seen corresponding path program 1 times [2020-10-27 23:32:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:32,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509121765] [2020-10-27 23:32:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:36,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:37,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:37,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:37,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:37,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 23:32:37,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:32:37,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-27 23:32:37,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:32:37,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-27 23:32:37,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:32:38,672 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:32:38,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:38,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:38,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:38,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:38,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:38,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 23:32:38,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:38,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509121765] [2020-10-27 23:32:38,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:38,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844987276] [2020-10-27 23:32:38,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:38,991 INFO L87 Difference]: Start difference. First operand 741 states. Second operand 4 states. [2020-10-27 23:32:39,865 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 23:32:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:45,189 INFO L93 Difference]: Finished difference Result 1385 states and 2443 transitions. [2020-10-27 23:32:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:45,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-27 23:32:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:45,238 INFO L225 Difference]: With dead ends: 1385 [2020-10-27 23:32:45,239 INFO L226 Difference]: Without dead ends: 1187 [2020-10-27 23:32:45,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2020-10-27 23:32:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1184. [2020-10-27 23:32:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2020-10-27 23:32:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1831 transitions. [2020-10-27 23:32:45,445 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1831 transitions. Word has length 315 [2020-10-27 23:32:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:45,447 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1831 transitions. [2020-10-27 23:32:45,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1831 transitions. [2020-10-27 23:32:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 23:32:45,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:45,460 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] [2020-10-27 23:32:45,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:32:45,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1362117100, now seen corresponding path program 1 times [2020-10-27 23:32:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:45,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474390765] [2020-10-27 23:32:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:45,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:45,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:50,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:50,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 23:32:50,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:32:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 23:32:50,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 23:32:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-27 23:32:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:51,489 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:32:51,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:51,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:51,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:51,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:51,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:51,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:32:51,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:51,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474390765] [2020-10-27 23:32:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894788444] [2020-10-27 23:32:51,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:51,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:51,694 INFO L87 Difference]: Start difference. First operand 1184 states and 1831 transitions. Second operand 4 states. [2020-10-27 23:32:52,409 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 23:32:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:56,882 INFO L93 Difference]: Finished difference Result 2410 states and 3760 transitions. [2020-10-27 23:32:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:56,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-27 23:32:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:56,898 INFO L225 Difference]: With dead ends: 2410 [2020-10-27 23:32:56,898 INFO L226 Difference]: Without dead ends: 2069 [2020-10-27 23:32:56,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2020-10-27 23:32:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 2066. [2020-10-27 23:32:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2020-10-27 23:32:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3187 transitions. [2020-10-27 23:32:56,996 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3187 transitions. Word has length 315 [2020-10-27 23:32:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:56,998 INFO L481 AbstractCegarLoop]: Abstraction has 2066 states and 3187 transitions. [2020-10-27 23:32:56,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3187 transitions. [2020-10-27 23:32:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 23:32:57,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:57,009 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] [2020-10-27 23:32:57,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:32:57,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash -592493232, now seen corresponding path program 1 times [2020-10-27 23:32:57,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:57,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486878055] [2020-10-27 23:32:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:02,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 23:33:02,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:33:02,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 23:33:02,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 23:33:02,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-27 23:33:02,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:33:02,952 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:33:02,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:02,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:02,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:02,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:02,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:33:02,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:02,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:02,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:02,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:02,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:03,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486878055] [2020-10-27 23:33:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353654828] [2020-10-27 23:33:03,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:03,153 INFO L87 Difference]: Start difference. First operand 2066 states and 3187 transitions. Second operand 4 states. [2020-10-27 23:33:03,810 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 23:33:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:08,039 INFO L93 Difference]: Finished difference Result 4352 states and 6771 transitions. [2020-10-27 23:33:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:08,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-27 23:33:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:08,061 INFO L225 Difference]: With dead ends: 4352 [2020-10-27 23:33:08,061 INFO L226 Difference]: Without dead ends: 3761 [2020-10-27 23:33:08,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2020-10-27 23:33:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3758. [2020-10-27 23:33:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3758 states. [2020-10-27 23:33:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5775 transitions. [2020-10-27 23:33:08,218 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5775 transitions. Word has length 315 [2020-10-27 23:33:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:08,218 INFO L481 AbstractCegarLoop]: Abstraction has 3758 states and 5775 transitions. [2020-10-27 23:33:08,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5775 transitions. [2020-10-27 23:33:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 23:33:08,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:08,230 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] [2020-10-27 23:33:08,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:33:08,230 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -918303924, now seen corresponding path program 1 times [2020-10-27 23:33:08,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:08,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878720569] [2020-10-27 23:33:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:08,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:09,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:10,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:33:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 23:33:13,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:14,254 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:33:14,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:14,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:14,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:14,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:14,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:33:14,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:14,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:14,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878720569] [2020-10-27 23:33:14,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:14,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:33:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483546208] [2020-10-27 23:33:14,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:33:14,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:33:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:14,497 INFO L87 Difference]: Start difference. First operand 3758 states and 5775 transitions. Second operand 5 states. [2020-10-27 23:33:20,981 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 23:33:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:22,841 INFO L93 Difference]: Finished difference Result 11083 states and 17012 transitions. [2020-10-27 23:33:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:33:22,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-27 23:33:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:22,878 INFO L225 Difference]: With dead ends: 11083 [2020-10-27 23:33:22,879 INFO L226 Difference]: Without dead ends: 7358 [2020-10-27 23:33:22,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:33:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2020-10-27 23:33:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 7355. [2020-10-27 23:33:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7355 states. [2020-10-27 23:33:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7355 states to 7355 states and 11235 transitions. [2020-10-27 23:33:23,232 INFO L78 Accepts]: Start accepts. Automaton has 7355 states and 11235 transitions. Word has length 315 [2020-10-27 23:33:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:23,233 INFO L481 AbstractCegarLoop]: Abstraction has 7355 states and 11235 transitions. [2020-10-27 23:33:23,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:33:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 7355 states and 11235 transitions. [2020-10-27 23:33:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-27 23:33:23,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:23,251 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] [2020-10-27 23:33:23,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:33:23,251 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash 447647583, now seen corresponding path program 1 times [2020-10-27 23:33:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:23,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75922683] [2020-10-27 23:33:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:24,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:25,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:25,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:28,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:28,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-27 23:33:28,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:33:28,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-27 23:33:28,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:28,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:33:28,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 23:33:28,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:29,108 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:33:29,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:29,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:29,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:29,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75922683] [2020-10-27 23:33:29,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:29,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90995244] [2020-10-27 23:33:29,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:29,259 INFO L87 Difference]: Start difference. First operand 7355 states and 11235 transitions. Second operand 4 states. [2020-10-27 23:33:36,426 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 23:33:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:38,376 INFO L93 Difference]: Finished difference Result 21681 states and 33073 transitions. [2020-10-27 23:33:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:38,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-10-27 23:33:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:38,465 INFO L225 Difference]: With dead ends: 21681 [2020-10-27 23:33:38,465 INFO L226 Difference]: Without dead ends: 14425 [2020-10-27 23:33:38,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14425 states. [2020-10-27 23:33:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14425 to 14422. [2020-10-27 23:33:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14422 states. [2020-10-27 23:33:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21902 transitions. [2020-10-27 23:33:39,205 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21902 transitions. Word has length 317 [2020-10-27 23:33:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:39,206 INFO L481 AbstractCegarLoop]: Abstraction has 14422 states and 21902 transitions. [2020-10-27 23:33:39,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21902 transitions. [2020-10-27 23:33:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-27 23:33:39,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:39,237 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] [2020-10-27 23:33:39,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:33:39,237 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1655879046, now seen corresponding path program 1 times [2020-10-27 23:33:39,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:39,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671640233] [2020-10-27 23:33:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:39,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:41,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:44,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:44,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-27 23:33:44,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:33:44,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:33:44,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:44,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:33:44,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:33:44,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:33:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:33:45,261 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:33:45,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:45,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:45,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:45,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671640233] [2020-10-27 23:33:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:33:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446227426] [2020-10-27 23:33:45,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:33:45,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:33:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:45,369 INFO L87 Difference]: Start difference. First operand 14422 states and 21902 transitions. Second operand 5 states. [2020-10-27 23:33:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:55,129 INFO L93 Difference]: Finished difference Result 42847 states and 64965 transitions. [2020-10-27 23:33:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:55,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-27 23:33:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:55,207 INFO L225 Difference]: With dead ends: 42847 [2020-10-27 23:33:55,207 INFO L226 Difference]: Without dead ends: 28735 [2020-10-27 23:33:55,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:33:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28735 states. [2020-10-27 23:33:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28735 to 14665. [2020-10-27 23:33:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14665 states. [2020-10-27 23:33:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14665 states to 14665 states and 22328 transitions. [2020-10-27 23:33:56,340 INFO L78 Accepts]: Start accepts. Automaton has 14665 states and 22328 transitions. Word has length 317 [2020-10-27 23:33:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:56,340 INFO L481 AbstractCegarLoop]: Abstraction has 14665 states and 22328 transitions. [2020-10-27 23:33:56,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:33:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14665 states and 22328 transitions. [2020-10-27 23:33:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-27 23:33:56,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:56,373 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] [2020-10-27 23:33:56,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:33:56,373 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1092830690, now seen corresponding path program 1 times [2020-10-27 23:33:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:56,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845849168] [2020-10-27 23:33:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:56,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:56,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:58,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:58,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:01,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-27 23:34:01,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:34:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:34:01,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:34:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 23:34:01,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 23:34:01,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:02,137 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:34:02,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:02,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:02,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:02,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:02,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:02,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845849168] [2020-10-27 23:34:02,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:02,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:34:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686635637] [2020-10-27 23:34:02,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:34:02,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:34:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:02,275 INFO L87 Difference]: Start difference. First operand 14665 states and 22328 transitions. Second operand 4 states. [2020-10-27 23:34:10,472 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 23:34:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:12,545 INFO L93 Difference]: Finished difference Result 41424 states and 62890 transitions. [2020-10-27 23:34:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:34:12,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-10-27 23:34:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:12,599 INFO L225 Difference]: With dead ends: 41424 [2020-10-27 23:34:12,600 INFO L226 Difference]: Without dead ends: 27100 [2020-10-27 23:34:12,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27100 states. [2020-10-27 23:34:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27100 to 27097. [2020-10-27 23:34:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27097 states. [2020-10-27 23:34:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27097 states to 27097 states and 40947 transitions. [2020-10-27 23:34:13,724 INFO L78 Accepts]: Start accepts. Automaton has 27097 states and 40947 transitions. Word has length 318 [2020-10-27 23:34:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:13,724 INFO L481 AbstractCegarLoop]: Abstraction has 27097 states and 40947 transitions. [2020-10-27 23:34:13,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:34:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27097 states and 40947 transitions. [2020-10-27 23:34:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-27 23:34:13,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:13,766 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] [2020-10-27 23:34:13,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:34:13,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash 655017420, now seen corresponding path program 1 times [2020-10-27 23:34:13,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129712267] [2020-10-27 23:34:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:13,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:13,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:14,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:15,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:15,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:34:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 23:34:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:34:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:19,560 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:34:19,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:19,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:19,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:19,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129712267] [2020-10-27 23:34:19,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:19,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:34:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379380040] [2020-10-27 23:34:19,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:34:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:34:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:19,680 INFO L87 Difference]: Start difference. First operand 27097 states and 40947 transitions. Second operand 4 states. [2020-10-27 23:34:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:29,558 INFO L93 Difference]: Finished difference Result 79413 states and 119509 transitions. [2020-10-27 23:34:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:34:29,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-27 23:34:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:29,663 INFO L225 Difference]: With dead ends: 79413 [2020-10-27 23:34:29,663 INFO L226 Difference]: Without dead ends: 53261 [2020-10-27 23:34:29,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53261 states. [2020-10-27 23:34:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53261 to 27194. [2020-10-27 23:34:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27194 states. [2020-10-27 23:34:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27194 states to 27194 states and 41073 transitions. [2020-10-27 23:34:31,136 INFO L78 Accepts]: Start accepts. Automaton has 27194 states and 41073 transitions. Word has length 319 [2020-10-27 23:34:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:31,136 INFO L481 AbstractCegarLoop]: Abstraction has 27194 states and 41073 transitions. [2020-10-27 23:34:31,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:34:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 27194 states and 41073 transitions. [2020-10-27 23:34:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-27 23:34:31,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:31,184 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] [2020-10-27 23:34:31,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:34:31,184 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1707134311, now seen corresponding path program 1 times [2020-10-27 23:34:31,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:31,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833880071] [2020-10-27 23:34:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:36,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:36,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-27 23:34:36,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:34:36,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:34:36,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:34:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:34:36,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:34:36,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:37,033 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:34:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:37,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:37,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:37,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833880071] [2020-10-27 23:34:37,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:37,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:34:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484662992] [2020-10-27 23:34:37,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:34:37,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:34:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:37,142 INFO L87 Difference]: Start difference. First operand 27194 states and 41073 transitions. Second operand 5 states. [2020-10-27 23:34:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:42,781 INFO L93 Difference]: Finished difference Result 51651 states and 77770 transitions. [2020-10-27 23:34:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:34:42,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2020-10-27 23:34:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:42,814 INFO L225 Difference]: With dead ends: 51651 [2020-10-27 23:34:42,814 INFO L226 Difference]: Without dead ends: 25395 [2020-10-27 23:34:42,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:34:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25395 states. [2020-10-27 23:34:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25395 to 25381. [2020-10-27 23:34:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25381 states. [2020-10-27 23:34:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25381 states to 25381 states and 38322 transitions. [2020-10-27 23:34:43,954 INFO L78 Accepts]: Start accepts. Automaton has 25381 states and 38322 transitions. Word has length 320 [2020-10-27 23:34:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:43,954 INFO L481 AbstractCegarLoop]: Abstraction has 25381 states and 38322 transitions. [2020-10-27 23:34:43,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:34:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25381 states and 38322 transitions. [2020-10-27 23:34:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-27 23:34:43,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:43,974 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] [2020-10-27 23:34:43,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:34:43,975 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 212621675, now seen corresponding path program 1 times [2020-10-27 23:34:43,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:43,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436077190] [2020-10-27 23:34:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:44,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:49,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-27 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:34:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-10-27 23:34:49,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 23:34:49,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:50,512 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-27 23:34:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:50,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:50,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:50,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:50,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:50,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436077190] [2020-10-27 23:34:50,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:50,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 23:34:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71975142] [2020-10-27 23:34:50,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:34:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:34:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:34:50,778 INFO L87 Difference]: Start difference. First operand 25381 states and 38322 transitions. Second operand 14 states. [2020-10-27 23:34:52,600 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 328 DAG size of output: 317 [2020-10-27 23:35:10,775 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-27 23:35:17,915 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-27 23:35:53,200 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 312 DAG size of output: 306 [2020-10-27 23:35:54,764 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 317 DAG size of output: 306 [2020-10-27 23:35:55,476 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 297