/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=SHALLOWEST --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_lcr.6.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:27:24,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:27:24,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:27:24,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:27:24,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:27:24,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:27:24,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:27:24,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:27:24,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:27:24,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:27:24,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:27:24,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:27:24,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:27:24,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:27:24,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:27:24,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:27:24,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:27:24,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:27:24,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:27:24,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:27:24,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:27:24,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:27:24,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:27:24,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:27:24,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:27:24,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:27:24,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:27:24,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:27:24,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:27:24,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:27:24,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:27:24,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:27:24,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:27:24,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:27:24,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:27:24,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:27:24,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:27:24,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:27:24,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:27:24,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:27:24,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:27:24,716 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 05:27:24,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:27:24,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:27:24,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:27:24,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:27:24,747 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:27:24,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:27:24,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:27:24,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:27:24,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:27:24,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:27:24,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:27:24,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:27:24,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:27:24,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:27:24,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:27:24,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:27:24,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:27:24,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:27:24,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:27:24,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:27:24,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:27:24,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:27:24,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:27:24,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:27:24,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:27:24,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:27:24,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:27:24,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:27:24,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:27:24,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:27:25,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:27:25,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:27:25,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:27:25,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:27:25,201 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:27:25,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:27:25,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70e5b7aa9/9a8c0df07c9a4c81acc5feadc5bb4e8c/FLAGc74e5666c [2020-10-27 05:27:26,365 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:27:26,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:27:26,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70e5b7aa9/9a8c0df07c9a4c81acc5feadc5bb4e8c/FLAGc74e5666c [2020-10-27 05:27:26,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70e5b7aa9/9a8c0df07c9a4c81acc5feadc5bb4e8c [2020-10-27 05:27:26,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:27:26,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:27:26,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:27:26,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:27:26,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:27:26,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:27:26" (1/1) ... [2020-10-27 05:27:26,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27629751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:26, skipping insertion in model container [2020-10-27 05:27:26,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:27:26" (1/1) ... [2020-10-27 05:27:26,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:27:27,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:27:28,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:27:28,778 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:27:29,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:27:29,628 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:27:29,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29 WrapperNode [2020-10-27 05:27:29,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:27:29,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:27:29,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:27:29,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:27:29,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (1/1) ... [2020-10-27 05:27:29,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:27:29,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:27:29,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:27:29,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:27:29,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (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 05:27:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:27:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:27:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:27:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:27:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:27:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:27:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:27:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:27:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:27:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:27:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:27:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:27:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:27:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:27:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:27:38,044 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:27:38,045 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:27:38,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:27:38 BoogieIcfgContainer [2020-10-27 05:27:38,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:27:38,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:27:38,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:27:38,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:27:38,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:27:26" (1/3) ... [2020-10-27 05:27:38,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fef3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:27:38, skipping insertion in model container [2020-10-27 05:27:38,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:29" (2/3) ... [2020-10-27 05:27:38,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fef3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:27:38, skipping insertion in model container [2020-10-27 05:27:38,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:27:38" (3/3) ... [2020-10-27 05:27:38,070 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:27:38,084 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:27:38,092 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:27:38,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:27:38,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:27:38,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:27:38,160 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:27:38,160 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:27:38,160 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:27:38,160 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:27:38,160 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:27:38,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:27:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states. [2020-10-27 05:27:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:27:38,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:27:38,327 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] [2020-10-27 05:27:38,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:27:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:27:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1412789034, now seen corresponding path program 1 times [2020-10-27 05:27:38,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:27:38,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258901769] [2020-10-27 05:27:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:27:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:39,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:42,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:43,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:43,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:27:43,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:27:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:27:43,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:27:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:27:43,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:27:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:27:46,430 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:27:46,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:27:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:27:46,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:27:46,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:27:46,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:27:46,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:27:46,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 05:27:46,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:27:46,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:27:46,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:27:46,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:27:46,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:27:46,653 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 05:27:46,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258901769] [2020-10-27 05:27:46,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:27:46,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:27:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5511059] [2020-10-27 05:27:46,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:27:46,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:27:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:27:46,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:27:46,685 INFO L87 Difference]: Start difference. First operand 2357 states. Second operand 6 states. [2020-10-27 05:27:48,448 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:28:06,791 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:28:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:07,871 INFO L93 Difference]: Finished difference Result 3330 states and 5910 transitions. [2020-10-27 05:28:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:28:07,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-27 05:28:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:07,903 INFO L225 Difference]: With dead ends: 3330 [2020-10-27 05:28:07,903 INFO L226 Difference]: Without dead ends: 2133 [2020-10-27 05:28:07,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:28:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2020-10-27 05:28:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 2011. [2020-10-27 05:28:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2011 states. [2020-10-27 05:28:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2708 transitions. [2020-10-27 05:28:08,080 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2708 transitions. Word has length 91 [2020-10-27 05:28:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:08,081 INFO L481 AbstractCegarLoop]: Abstraction has 2011 states and 2708 transitions. [2020-10-27 05:28:08,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:28:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2708 transitions. [2020-10-27 05:28:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:28:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:08,090 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] [2020-10-27 05:28:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:28:08,091 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 866672102, now seen corresponding path program 1 times [2020-10-27 05:28:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661814766] [2020-10-27 05:28:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:08,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:09,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:13,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:13,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:28:13,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:28:13,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:28:13,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:28:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:28:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:28:13,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:14,995 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:28:14,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:15,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:15,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:15,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:15,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:28:15,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:15,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:28:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:28:15,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:15,152 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 05:28:15,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661814766] [2020-10-27 05:28:15,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:15,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:28:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522651373] [2020-10-27 05:28:15,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:28:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:28:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:28:15,159 INFO L87 Difference]: Start difference. First operand 2011 states and 2708 transitions. Second operand 6 states. [2020-10-27 05:28:16,958 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:28:26,216 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:28:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:27,202 INFO L93 Difference]: Finished difference Result 2686 states and 3634 transitions. [2020-10-27 05:28:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:28:27,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-27 05:28:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:27,215 INFO L225 Difference]: With dead ends: 2686 [2020-10-27 05:28:27,215 INFO L226 Difference]: Without dead ends: 1708 [2020-10-27 05:28:27,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:28:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-10-27 05:28:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1642. [2020-10-27 05:28:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2020-10-27 05:28:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2268 transitions. [2020-10-27 05:28:27,298 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2268 transitions. Word has length 91 [2020-10-27 05:28:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:27,299 INFO L481 AbstractCegarLoop]: Abstraction has 1642 states and 2268 transitions. [2020-10-27 05:28:27,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:28:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2268 transitions. [2020-10-27 05:28:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:28:27,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:27,304 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] [2020-10-27 05:28:27,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:28:27,304 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 366680494, now seen corresponding path program 1 times [2020-10-27 05:28:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:27,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707838537] [2020-10-27 05:28:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:27,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:27,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:27,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:29,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:29,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:32,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:28:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:28:32,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:34,184 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:28:34,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:34,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:28:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:34,316 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 05:28:34,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707838537] [2020-10-27 05:28:34,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:34,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:28:34,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949885009] [2020-10-27 05:28:34,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:28:34,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:28:34,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:28:34,318 INFO L87 Difference]: Start difference. First operand 1642 states and 2268 transitions. Second operand 6 states. [2020-10-27 05:28:36,079 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:28:43,943 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:28:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:28:44,751 INFO L93 Difference]: Finished difference Result 3315 states and 4688 transitions. [2020-10-27 05:28:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:28:44,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-27 05:28:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:28:44,767 INFO L225 Difference]: With dead ends: 3315 [2020-10-27 05:28:44,767 INFO L226 Difference]: Without dead ends: 2330 [2020-10-27 05:28:44,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:28:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2020-10-27 05:28:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2260. [2020-10-27 05:28:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2260 states. [2020-10-27 05:28:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3227 transitions. [2020-10-27 05:28:44,909 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3227 transitions. Word has length 91 [2020-10-27 05:28:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:28:44,910 INFO L481 AbstractCegarLoop]: Abstraction has 2260 states and 3227 transitions. [2020-10-27 05:28:44,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:28:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3227 transitions. [2020-10-27 05:28:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:28:44,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:28:44,915 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] [2020-10-27 05:28:44,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:28:44,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:28:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:28:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2007967766, now seen corresponding path program 1 times [2020-10-27 05:28:44,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:28:44,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727490113] [2020-10-27 05:28:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:28:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:45,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:46,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:46,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:49,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:49,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:28:49,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:28:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 05:28:50,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:50,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:28:50,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:28:50,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:28:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:51,786 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:28:51,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:28:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:28:51,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:28:51,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:28:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:28:51,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:28:51,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:28:51,938 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 05:28:51,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727490113] [2020-10-27 05:28:51,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:28:51,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:28:51,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968689497] [2020-10-27 05:28:51,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:28:51,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:28:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:28:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:28:51,941 INFO L87 Difference]: Start difference. First operand 2260 states and 3227 transitions. Second operand 6 states. [2020-10-27 05:28:53,734 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:29:00,046 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:29:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:00,936 INFO L93 Difference]: Finished difference Result 4261 states and 6183 transitions. [2020-10-27 05:29:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:29:00,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-27 05:29:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:00,954 INFO L225 Difference]: With dead ends: 4261 [2020-10-27 05:29:00,954 INFO L226 Difference]: Without dead ends: 3055 [2020-10-27 05:29:00,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2020-10-27 05:29:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2989. [2020-10-27 05:29:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2989 states. [2020-10-27 05:29:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4370 transitions. [2020-10-27 05:29:01,128 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4370 transitions. Word has length 92 [2020-10-27 05:29:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:01,128 INFO L481 AbstractCegarLoop]: Abstraction has 2989 states and 4370 transitions. [2020-10-27 05:29:01,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4370 transitions. [2020-10-27 05:29:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 05:29:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:01,139 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] [2020-10-27 05:29:01,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:29:01,140 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1321100707, now seen corresponding path program 1 times [2020-10-27 05:29:01,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356382488] [2020-10-27 05:29:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:01,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:01,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:01,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:01,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:04,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:06,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:06,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 05:29:06,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:29:06,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:29:06,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:29:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:29:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:08,040 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:29:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:08,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:08,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:08,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:08,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:08,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 05:29:08,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:08,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:08,164 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 05:29:08,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356382488] [2020-10-27 05:29:08,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:08,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:29:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81273397] [2020-10-27 05:29:08,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:29:08,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:29:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:29:08,167 INFO L87 Difference]: Start difference. First operand 2989 states and 4370 transitions. Second operand 6 states. [2020-10-27 05:29:09,966 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 05:29:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:15,034 INFO L93 Difference]: Finished difference Result 4714 states and 6961 transitions. [2020-10-27 05:29:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:29:15,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-27 05:29:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:15,048 INFO L225 Difference]: With dead ends: 4714 [2020-10-27 05:29:15,049 INFO L226 Difference]: Without dead ends: 2973 [2020-10-27 05:29:15,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2020-10-27 05:29:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2973. [2020-10-27 05:29:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-27 05:29:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 4336 transitions. [2020-10-27 05:29:15,232 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 4336 transitions. Word has length 93 [2020-10-27 05:29:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:15,235 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 4336 transitions. [2020-10-27 05:29:15,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 4336 transitions. [2020-10-27 05:29:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 05:29:15,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:15,240 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] [2020-10-27 05:29:15,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:29:15,241 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 406978209, now seen corresponding path program 1 times [2020-10-27 05:29:15,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:15,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732650343] [2020-10-27 05:29:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:16,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:16,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:19,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:19,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:19,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:20,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:29:20,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:22,199 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:29:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:22,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:22,385 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 05:29:22,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732650343] [2020-10-27 05:29:22,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:22,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:29:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413668470] [2020-10-27 05:29:22,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:29:22,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:29:22,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:29:22,389 INFO L87 Difference]: Start difference. First operand 2973 states and 4336 transitions. Second operand 11 states. [2020-10-27 05:29:24,260 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 510 [2020-10-27 05:29:31,833 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:29:34,416 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 05:29:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:37,686 INFO L93 Difference]: Finished difference Result 8943 states and 13368 transitions. [2020-10-27 05:29:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:29:37,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-10-27 05:29:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:37,722 INFO L225 Difference]: With dead ends: 8943 [2020-10-27 05:29:37,723 INFO L226 Difference]: Without dead ends: 7707 [2020-10-27 05:29:37,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:29:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2020-10-27 05:29:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 2973. [2020-10-27 05:29:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-27 05:29:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 4335 transitions. [2020-10-27 05:29:38,031 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 4335 transitions. Word has length 94 [2020-10-27 05:29:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:38,031 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 4335 transitions. [2020-10-27 05:29:38,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:29:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 4335 transitions. [2020-10-27 05:29:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 05:29:38,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:38,036 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] [2020-10-27 05:29:38,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:29:38,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1705640831, now seen corresponding path program 1 times [2020-10-27 05:29:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:38,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419421373] [2020-10-27 05:29:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:38,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:38,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:39,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:39,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:40,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:40,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:41,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:43,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:43,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 05:29:43,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:29:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:44,872 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:29:44,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:29:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:44,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:29:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:29:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:29:44,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419421373] [2020-10-27 05:29:44,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:29:44,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:29:44,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064745336] [2020-10-27 05:29:44,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:29:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:29:44,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:29:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:29:44,963 INFO L87 Difference]: Start difference. First operand 2973 states and 4335 transitions. Second operand 6 states. [2020-10-27 05:29:46,775 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:29:52,797 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:29:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:29:53,663 INFO L93 Difference]: Finished difference Result 6783 states and 9990 transitions. [2020-10-27 05:29:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:29:53,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-27 05:29:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:29:53,688 INFO L225 Difference]: With dead ends: 6783 [2020-10-27 05:29:53,688 INFO L226 Difference]: Without dead ends: 5030 [2020-10-27 05:29:53,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:29:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2020-10-27 05:29:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4984. [2020-10-27 05:29:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2020-10-27 05:29:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 7326 transitions. [2020-10-27 05:29:54,095 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 7326 transitions. Word has length 94 [2020-10-27 05:29:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:29:54,095 INFO L481 AbstractCegarLoop]: Abstraction has 4984 states and 7326 transitions. [2020-10-27 05:29:54,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:29:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 7326 transitions. [2020-10-27 05:29:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:29:54,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:29:54,102 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] [2020-10-27 05:29:54,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:29:54,102 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:29:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:29:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash 145231462, now seen corresponding path program 1 times [2020-10-27 05:29:54,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:29:54,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108033517] [2020-10-27 05:29:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:29:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:29:54,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:54,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:54,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:55,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:57,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:57,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:29:59,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 05:29:59,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:01,035 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:30:01,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:01,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:01,201 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 05:30:01,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108033517] [2020-10-27 05:30:01,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:01,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:30:01,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606106266] [2020-10-27 05:30:01,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:30:01,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:30:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:30:01,203 INFO L87 Difference]: Start difference. First operand 4984 states and 7326 transitions. Second operand 10 states. [2020-10-27 05:30:02,997 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-27 05:30:09,519 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:30:11,628 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 05:30:15,521 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 05:30:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:30:16,366 INFO L93 Difference]: Finished difference Result 16268 states and 24546 transitions. [2020-10-27 05:30:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:30:16,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2020-10-27 05:30:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:30:16,398 INFO L225 Difference]: With dead ends: 16268 [2020-10-27 05:30:16,398 INFO L226 Difference]: Without dead ends: 14000 [2020-10-27 05:30:16,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:30:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2020-10-27 05:30:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 4984. [2020-10-27 05:30:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2020-10-27 05:30:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 7322 transitions. [2020-10-27 05:30:16,855 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 7322 transitions. Word has length 95 [2020-10-27 05:30:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:30:16,855 INFO L481 AbstractCegarLoop]: Abstraction has 4984 states and 7322 transitions. [2020-10-27 05:30:16,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:30:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 7322 transitions. [2020-10-27 05:30:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:30:16,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:30:16,861 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] [2020-10-27 05:30:16,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:30:16,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:30:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:30:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1069552388, now seen corresponding path program 1 times [2020-10-27 05:30:16,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:30:16,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677189366] [2020-10-27 05:30:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:30:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:20,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:20,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:21,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:21,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:21,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:30:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:23,764 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:30:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:23,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:23,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:23,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:23,879 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 05:30:23,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677189366] [2020-10-27 05:30:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:30:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128889276] [2020-10-27 05:30:23,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:30:23,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:30:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:30:23,881 INFO L87 Difference]: Start difference. First operand 4984 states and 7322 transitions. Second operand 9 states. [2020-10-27 05:30:25,837 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-27 05:30:32,180 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-27 05:30:34,883 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-27 05:30:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:30:36,301 INFO L93 Difference]: Finished difference Result 10964 states and 16092 transitions. [2020-10-27 05:30:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:30:36,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-10-27 05:30:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:30:36,320 INFO L225 Difference]: With dead ends: 10964 [2020-10-27 05:30:36,320 INFO L226 Difference]: Without dead ends: 7819 [2020-10-27 05:30:36,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:30:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7819 states. [2020-10-27 05:30:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7819 to 4984. [2020-10-27 05:30:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2020-10-27 05:30:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 7321 transitions. [2020-10-27 05:30:36,754 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 7321 transitions. Word has length 95 [2020-10-27 05:30:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:30:36,754 INFO L481 AbstractCegarLoop]: Abstraction has 4984 states and 7321 transitions. [2020-10-27 05:30:36,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:30:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 7321 transitions. [2020-10-27 05:30:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 05:30:36,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:30:36,760 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] [2020-10-27 05:30:36,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:30:36,761 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:30:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:30:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1120777496, now seen corresponding path program 1 times [2020-10-27 05:30:36,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:30:36,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673829215] [2020-10-27 05:30:36,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:30:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:36,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:38,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:39,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:39,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:41,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 05:30:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:43,744 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 05:30:43,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:30:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:30:43,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:30:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:30:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:30:43,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:30:43,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:30:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:30:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:30:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:30:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:30:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:30:43,842 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 05:30:43,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673829215] [2020-10-27 05:30:43,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:30:43,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:30:43,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511765505] [2020-10-27 05:30:43,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:30:43,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:30:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:30:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:30:43,844 INFO L87 Difference]: Start difference. First operand 4984 states and 7321 transitions. Second operand 10 states. [2020-10-27 05:30:47,569 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 510 DAG size of output: 506 [2020-10-27 05:30:56,356 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 508 DAG size of output: 504