/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:22:28,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:22:28,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:22:28,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:22:28,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:22:28,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:22:28,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:22:28,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:22:28,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:22:28,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:22:28,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:22:28,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:22:28,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:22:28,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:22:28,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:22:28,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:22:28,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:22:28,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:22:28,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:22:28,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:22:28,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:22:28,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:22:28,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:22:28,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:22:29,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:22:29,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:22:29,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:22:29,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:22:29,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:22:29,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:22:29,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:22:29,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:22:29,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:22:29,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:22:29,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:22:29,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:22:29,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:22:29,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:22:29,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:22:29,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:22:29,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:22:29,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:22:29,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:22:29,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:22:29,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:22:29,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:22:29,097 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:22:29,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:22:29,098 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:22:29,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:22:29,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:22:29,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:22:29,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:22:29,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:22:29,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:22:29,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:22:29,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:22:29,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:22:29,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:22:29,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:22:29,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:22:29,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:22:29,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:22:29,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:22:29,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:22:29,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:22:29,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:22:29,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:22:29,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:22:29,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:22:29,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:22:29,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:22:29,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:22:29,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:22:29,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:22:29,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:22:29,642 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:22:29,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 00:22:29,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7863eb855/e0934fe974544a1185ba2de6b3da8ff0/FLAGf1063d2c5 [2020-10-28 00:22:30,560 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:22:30,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 00:22:30,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7863eb855/e0934fe974544a1185ba2de6b3da8ff0/FLAGf1063d2c5 [2020-10-28 00:22:30,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7863eb855/e0934fe974544a1185ba2de6b3da8ff0 [2020-10-28 00:22:30,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:22:30,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:22:30,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:22:30,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:22:30,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:22:30,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:30" (1/1) ... [2020-10-28 00:22:30,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:30, skipping insertion in model container [2020-10-28 00:22:30,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:22:30" (1/1) ... [2020-10-28 00:22:30,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:22:30,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:22:31,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:22:31,339 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:22:31,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:22:31,562 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:22:31,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31 WrapperNode [2020-10-28 00:22:31,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:22:31,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:22:31,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:22:31,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:22:31,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... [2020-10-28 00:22:31,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:22:31,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:22:31,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:22:31,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:22:31,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:22:31,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:22:31,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:22:31,741 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:22:31,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:22:31,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:22:31,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:22:31,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:22:31,742 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:22:31,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:22:31,743 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 00:22:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:22:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:22:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:22:32,954 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:22:32,955 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:22:32,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:32 BoogieIcfgContainer [2020-10-28 00:22:32,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:22:32,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:22:32,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:22:32,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:22:32,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:22:30" (1/3) ... [2020-10-28 00:22:32,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419ede42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:32, skipping insertion in model container [2020-10-28 00:22:32,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:22:31" (2/3) ... [2020-10-28 00:22:32,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419ede42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:22:32, skipping insertion in model container [2020-10-28 00:22:32,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:22:32" (3/3) ... [2020-10-28 00:22:32,968 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 00:22:32,980 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:22:32,986 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:22:33,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:22:33,057 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:22:33,057 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:22:33,057 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:22:33,057 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:22:33,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:22:33,058 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:22:33,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:22:33,058 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:22:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states. [2020-10-28 00:22:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 00:22:33,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:33,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:33,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -376386357, now seen corresponding path program 1 times [2020-10-28 00:22:33,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:33,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212246010] [2020-10-28 00:22:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:38,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:38,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 00:22:38,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:22:38,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 00:22:38,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:22:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-28 00:22:38,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:22:38,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:22:39,037 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:22:39,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:39,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:39,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:22:39,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:39,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:22:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212246010] [2020-10-28 00:22:39,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:39,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:22:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408481985] [2020-10-28 00:22:39,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:22:39,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:22:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:22:39,190 INFO L87 Difference]: Start difference. First operand 259 states. Second operand 4 states. [2020-10-28 00:22:39,642 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 00:22:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:41,155 INFO L93 Difference]: Finished difference Result 516 states and 848 transitions. [2020-10-28 00:22:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:22:41,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-28 00:22:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:41,176 INFO L225 Difference]: With dead ends: 516 [2020-10-28 00:22:41,177 INFO L226 Difference]: Without dead ends: 388 [2020-10-28 00:22:41,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-28 00:22:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 385. [2020-10-28 00:22:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-28 00:22:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 573 transitions. [2020-10-28 00:22:41,324 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 573 transitions. Word has length 101 [2020-10-28 00:22:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:41,325 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 573 transitions. [2020-10-28 00:22:41,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:22:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 573 transitions. [2020-10-28 00:22:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 00:22:41,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:41,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:41,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:22:41,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash -215852236, now seen corresponding path program 1 times [2020-10-28 00:22:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:41,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870850996] [2020-10-28 00:22:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:43,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 00:22:43,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:43,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1857 [2020-10-28 00:22:43,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:22:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 00:22:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:22:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:43,697 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:22:43,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:43,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:43,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:43,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:43,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:43,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870850996] [2020-10-28 00:22:43,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:43,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:22:43,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339212659] [2020-10-28 00:22:43,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:22:43,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:22:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:43,760 INFO L87 Difference]: Start difference. First operand 385 states and 573 transitions. Second operand 5 states. [2020-10-28 00:22:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:45,165 INFO L93 Difference]: Finished difference Result 595 states and 904 transitions. [2020-10-28 00:22:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:22:45,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-28 00:22:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:45,178 INFO L225 Difference]: With dead ends: 595 [2020-10-28 00:22:45,178 INFO L226 Difference]: Without dead ends: 592 [2020-10-28 00:22:45,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:22:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-28 00:22:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 387. [2020-10-28 00:22:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-28 00:22:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 575 transitions. [2020-10-28 00:22:45,218 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 575 transitions. Word has length 102 [2020-10-28 00:22:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:45,219 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 575 transitions. [2020-10-28 00:22:45,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:22:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 575 transitions. [2020-10-28 00:22:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 00:22:45,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:45,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:45,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:22:45,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:45,222 INFO L82 PathProgramCache]: Analyzing trace with hash -936369326, now seen corresponding path program 1 times [2020-10-28 00:22:45,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:45,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684761483] [2020-10-28 00:22:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:46,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:46,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 00:22:46,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 00:22:46,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:47,397 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:22:47,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:47,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:47,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:47,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:47,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:22:47,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:47,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:47,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684761483] [2020-10-28 00:22:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:22:47,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775470367] [2020-10-28 00:22:47,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:22:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:47,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:22:47,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:22:47,536 INFO L87 Difference]: Start difference. First operand 387 states and 575 transitions. Second operand 9 states. [2020-10-28 00:22:49,378 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 00:22:49,802 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:22:50,193 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 00:22:50,658 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 00:22:51,103 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 00:22:51,593 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-28 00:22:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:52,820 INFO L93 Difference]: Finished difference Result 1920 states and 2959 transitions. [2020-10-28 00:22:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 00:22:52,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2020-10-28 00:22:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:52,837 INFO L225 Difference]: With dead ends: 1920 [2020-10-28 00:22:52,837 INFO L226 Difference]: Without dead ends: 1633 [2020-10-28 00:22:52,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 00:22:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2020-10-28 00:22:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1618. [2020-10-28 00:22:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1618 states. [2020-10-28 00:22:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2489 transitions. [2020-10-28 00:22:52,991 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2489 transitions. Word has length 103 [2020-10-28 00:22:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:52,993 INFO L481 AbstractCegarLoop]: Abstraction has 1618 states and 2489 transitions. [2020-10-28 00:22:52,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:22:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2489 transitions. [2020-10-28 00:22:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 00:22:53,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:53,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:53,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:22:53,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1952800505, now seen corresponding path program 1 times [2020-10-28 00:22:53,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:53,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483183845] [2020-10-28 00:22:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:53,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:53,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:53,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:53,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 00:22:53,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:22:53,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-28 00:22:53,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:22:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:22:53,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 00:22:53,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:54,308 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:22:54,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:22:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:54,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:22:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:22:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:22:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:22:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:22:54,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483183845] [2020-10-28 00:22:54,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:22:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:22:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414427190] [2020-10-28 00:22:54,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:22:54,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:22:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:22:54,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:22:54,408 INFO L87 Difference]: Start difference. First operand 1618 states and 2489 transitions. Second operand 5 states. [2020-10-28 00:22:54,844 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 00:22:55,983 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:22:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:22:56,562 INFO L93 Difference]: Finished difference Result 3726 states and 5799 transitions. [2020-10-28 00:22:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:22:56,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-28 00:22:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:22:56,579 INFO L225 Difference]: With dead ends: 3726 [2020-10-28 00:22:56,579 INFO L226 Difference]: Without dead ends: 2633 [2020-10-28 00:22:56,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:22:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2020-10-28 00:22:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2630. [2020-10-28 00:22:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2630 states. [2020-10-28 00:22:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 4067 transitions. [2020-10-28 00:22:56,780 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 4067 transitions. Word has length 104 [2020-10-28 00:22:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:22:56,780 INFO L481 AbstractCegarLoop]: Abstraction has 2630 states and 4067 transitions. [2020-10-28 00:22:56,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:22:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 4067 transitions. [2020-10-28 00:22:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:22:56,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:22:56,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:22:56,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:22:56,784 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:22:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:22:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1517768646, now seen corresponding path program 1 times [2020-10-28 00:22:56,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:22:56,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506646203] [2020-10-28 00:22:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:22:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:22:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:22:58,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:00,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:01,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:01,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:01,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:23:01,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:23:01,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-28 00:23:01,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:23:01,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:02,238 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:02,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:02,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:02,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:02,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:02,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:02,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:23:02,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:02,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:02,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:02,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506646203] [2020-10-28 00:23:02,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:02,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236700969] [2020-10-28 00:23:02,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:02,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:02,298 INFO L87 Difference]: Start difference. First operand 2630 states and 4067 transitions. Second operand 4 states. [2020-10-28 00:23:02,688 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:23:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:04,005 INFO L93 Difference]: Finished difference Result 5011 states and 7805 transitions. [2020-10-28 00:23:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:04,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:23:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:04,028 INFO L225 Difference]: With dead ends: 5011 [2020-10-28 00:23:04,028 INFO L226 Difference]: Without dead ends: 3809 [2020-10-28 00:23:04,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2020-10-28 00:23:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 3796. [2020-10-28 00:23:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3796 states. [2020-10-28 00:23:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5839 transitions. [2020-10-28 00:23:04,294 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5839 transitions. Word has length 105 [2020-10-28 00:23:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 3796 states and 5839 transitions. [2020-10-28 00:23:04,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5839 transitions. [2020-10-28 00:23:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:04,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:04,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:04,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:23:04,299 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash 391795047, now seen corresponding path program 1 times [2020-10-28 00:23:04,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:04,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173729233] [2020-10-28 00:23:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:04,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:05,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:06,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:09,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:09,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:09,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:23:09,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:23:09,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:09,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:09,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 00:23:09,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:23:09,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:09,892 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:09,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:09,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:09,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:09,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:09,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:09,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:23:09,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:09,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:09,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:09,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:09,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:23:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:09,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173729233] [2020-10-28 00:23:09,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:09,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:09,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216087750] [2020-10-28 00:23:09,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:09,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:09,972 INFO L87 Difference]: Start difference. First operand 3796 states and 5839 transitions. Second operand 4 states. [2020-10-28 00:23:10,353 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:23:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:11,664 INFO L93 Difference]: Finished difference Result 5290 states and 8151 transitions. [2020-10-28 00:23:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:11,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:23:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:11,689 INFO L225 Difference]: With dead ends: 5290 [2020-10-28 00:23:11,689 INFO L226 Difference]: Without dead ends: 4501 [2020-10-28 00:23:11,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2020-10-28 00:23:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 4498. [2020-10-28 00:23:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2020-10-28 00:23:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6863 transitions. [2020-10-28 00:23:11,993 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6863 transitions. Word has length 105 [2020-10-28 00:23:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:11,993 INFO L481 AbstractCegarLoop]: Abstraction has 4498 states and 6863 transitions. [2020-10-28 00:23:11,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6863 transitions. [2020-10-28 00:23:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:12,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:12,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:12,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:23:12,063 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash 96344444, now seen corresponding path program 1 times [2020-10-28 00:23:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:12,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775495315] [2020-10-28 00:23:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:12,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:12,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:12,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:17,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:17,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:17,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:23:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:23:17,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:23:17,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:17,518 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:17,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:17,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:17,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:17,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:23:17,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:17,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:17,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775495315] [2020-10-28 00:23:17,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:17,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:17,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400934027] [2020-10-28 00:23:17,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:17,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:17,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:17,574 INFO L87 Difference]: Start difference. First operand 4498 states and 6863 transitions. Second operand 4 states. [2020-10-28 00:23:17,958 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:23:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:19,354 INFO L93 Difference]: Finished difference Result 7809 states and 11963 transitions. [2020-10-28 00:23:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:19,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:23:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:19,382 INFO L225 Difference]: With dead ends: 7809 [2020-10-28 00:23:19,382 INFO L226 Difference]: Without dead ends: 5592 [2020-10-28 00:23:19,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2020-10-28 00:23:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 5581. [2020-10-28 00:23:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5581 states. [2020-10-28 00:23:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5581 states to 5581 states and 8427 transitions. [2020-10-28 00:23:19,859 INFO L78 Accepts]: Start accepts. Automaton has 5581 states and 8427 transitions. Word has length 105 [2020-10-28 00:23:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:19,860 INFO L481 AbstractCegarLoop]: Abstraction has 5581 states and 8427 transitions. [2020-10-28 00:23:19,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5581 states and 8427 transitions. [2020-10-28 00:23:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:19,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:19,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:19,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:23:19,865 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1741301180, now seen corresponding path program 1 times [2020-10-28 00:23:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:19,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017933671] [2020-10-28 00:23:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:19,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:20,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:21,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:24,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:24,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:23:24,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:25,311 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:25,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:25,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:25,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:25,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017933671] [2020-10-28 00:23:25,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:25,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140527747] [2020-10-28 00:23:25,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:25,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:25,441 INFO L87 Difference]: Start difference. First operand 5581 states and 8427 transitions. Second operand 4 states. [2020-10-28 00:23:25,837 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:23:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:27,429 INFO L93 Difference]: Finished difference Result 13779 states and 20867 transitions. [2020-10-28 00:23:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:27,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:23:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:27,474 INFO L225 Difference]: With dead ends: 13779 [2020-10-28 00:23:27,474 INFO L226 Difference]: Without dead ends: 9390 [2020-10-28 00:23:27,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2020-10-28 00:23:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 9379. [2020-10-28 00:23:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9379 states. [2020-10-28 00:23:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 14027 transitions. [2020-10-28 00:23:28,114 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 14027 transitions. Word has length 105 [2020-10-28 00:23:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:28,115 INFO L481 AbstractCegarLoop]: Abstraction has 9379 states and 14027 transitions. [2020-10-28 00:23:28,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 14027 transitions. [2020-10-28 00:23:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:28,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:28,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:28,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:23:28,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1661264902, now seen corresponding path program 1 times [2020-10-28 00:23:28,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:28,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102523199] [2020-10-28 00:23:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:28,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:28,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:28,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:28,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:31,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:31,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3550 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:23:31,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:32,164 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:32,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:32,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:32,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:32,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102523199] [2020-10-28 00:23:32,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:32,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:23:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862273111] [2020-10-28 00:23:32,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:23:32,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:23:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:23:32,210 INFO L87 Difference]: Start difference. First operand 9379 states and 14027 transitions. Second operand 6 states. [2020-10-28 00:23:33,617 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:23:35,440 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:23:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:36,710 INFO L93 Difference]: Finished difference Result 68128 states and 101471 transitions. [2020-10-28 00:23:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:23:36,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 00:23:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:36,899 INFO L225 Difference]: With dead ends: 68128 [2020-10-28 00:23:36,899 INFO L226 Difference]: Without dead ends: 59322 [2020-10-28 00:23:36,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:23:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59322 states. [2020-10-28 00:23:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59322 to 9788. [2020-10-28 00:23:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9788 states. [2020-10-28 00:23:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 14461 transitions. [2020-10-28 00:23:38,401 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 14461 transitions. Word has length 105 [2020-10-28 00:23:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:38,401 INFO L481 AbstractCegarLoop]: Abstraction has 9788 states and 14461 transitions. [2020-10-28 00:23:38,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:23:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 14461 transitions. [2020-10-28 00:23:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:38,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:38,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:38,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:23:38,410 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 318390780, now seen corresponding path program 1 times [2020-10-28 00:23:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803123572] [2020-10-28 00:23:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:38,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:38,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:43,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:23:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:43,843 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:43,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:43,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:43,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:43,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:43,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803123572] [2020-10-28 00:23:43,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:43,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:23:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563557690] [2020-10-28 00:23:43,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:23:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:23:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:23:43,883 INFO L87 Difference]: Start difference. First operand 9788 states and 14461 transitions. Second operand 4 states. [2020-10-28 00:23:44,285 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 00:23:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:46,433 INFO L93 Difference]: Finished difference Result 26219 states and 38989 transitions. [2020-10-28 00:23:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:23:46,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 00:23:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:46,478 INFO L225 Difference]: With dead ends: 26219 [2020-10-28 00:23:46,479 INFO L226 Difference]: Without dead ends: 17714 [2020-10-28 00:23:46,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:23:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2020-10-28 00:23:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 17711. [2020-10-28 00:23:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17711 states. [2020-10-28 00:23:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17711 states to 17711 states and 26179 transitions. [2020-10-28 00:23:47,710 INFO L78 Accepts]: Start accepts. Automaton has 17711 states and 26179 transitions. Word has length 105 [2020-10-28 00:23:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:47,710 INFO L481 AbstractCegarLoop]: Abstraction has 17711 states and 26179 transitions. [2020-10-28 00:23:47,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:23:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 17711 states and 26179 transitions. [2020-10-28 00:23:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:47,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:47,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:23:47,719 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1002822997, now seen corresponding path program 1 times [2020-10-28 00:23:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995592956] [2020-10-28 00:23:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:47,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:50,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:50,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:23:50,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:23:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2688 [2020-10-28 00:23:50,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:50,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:23:50,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:23:50,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:23:50,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:23:50,897 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:23:50,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:23:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:50,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:50,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:23:50,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:23:50,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:23:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:23:50,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:23:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:23:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:23:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:23:50,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:23:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:23:50,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995592956] [2020-10-28 00:23:50,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:23:50,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:23:50,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492591161] [2020-10-28 00:23:50,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:23:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:23:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:23:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:23:50,964 INFO L87 Difference]: Start difference. First operand 17711 states and 26179 transitions. Second operand 6 states. [2020-10-28 00:23:52,625 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:23:55,290 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:23:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:23:56,992 INFO L93 Difference]: Finished difference Result 76452 states and 112244 transitions. [2020-10-28 00:23:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:23:56,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 00:23:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:23:57,089 INFO L225 Difference]: With dead ends: 76452 [2020-10-28 00:23:57,089 INFO L226 Difference]: Without dead ends: 60990 [2020-10-28 00:23:57,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:23:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60990 states. [2020-10-28 00:23:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60990 to 32303. [2020-10-28 00:23:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32303 states. [2020-10-28 00:23:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32303 states to 32303 states and 47124 transitions. [2020-10-28 00:23:59,825 INFO L78 Accepts]: Start accepts. Automaton has 32303 states and 47124 transitions. Word has length 105 [2020-10-28 00:23:59,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:23:59,825 INFO L481 AbstractCegarLoop]: Abstraction has 32303 states and 47124 transitions. [2020-10-28 00:23:59,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:23:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32303 states and 47124 transitions. [2020-10-28 00:23:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:23:59,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:23:59,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:23:59,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:23:59,841 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:23:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:23:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2064386961, now seen corresponding path program 1 times [2020-10-28 00:23:59,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:23:59,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875949346] [2020-10-28 00:23:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:23:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:23:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:23:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:02,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:24:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2751 [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:24:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:03,049 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:24:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:03,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:03,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:03,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:03,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875949346] [2020-10-28 00:24:03,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:03,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:24:03,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529065447] [2020-10-28 00:24:03,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:24:03,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:24:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:24:03,097 INFO L87 Difference]: Start difference. First operand 32303 states and 47124 transitions. Second operand 6 states. [2020-10-28 00:24:04,744 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:24:08,304 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:24:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:15,756 INFO L93 Difference]: Finished difference Result 178065 states and 256242 transitions. [2020-10-28 00:24:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:24:15,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 00:24:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:15,993 INFO L225 Difference]: With dead ends: 178065 [2020-10-28 00:24:15,993 INFO L226 Difference]: Without dead ends: 148868 [2020-10-28 00:24:16,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:24:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148868 states. [2020-10-28 00:24:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148868 to 33767. [2020-10-28 00:24:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33767 states. [2020-10-28 00:24:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33767 states to 33767 states and 48736 transitions. [2020-10-28 00:24:19,750 INFO L78 Accepts]: Start accepts. Automaton has 33767 states and 48736 transitions. Word has length 105 [2020-10-28 00:24:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:19,751 INFO L481 AbstractCegarLoop]: Abstraction has 33767 states and 48736 transitions. [2020-10-28 00:24:19,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:24:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33767 states and 48736 transitions. [2020-10-28 00:24:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:24:19,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:19,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:24:19,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:24:19,766 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash -407519012, now seen corresponding path program 1 times [2020-10-28 00:24:19,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:19,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244108237] [2020-10-28 00:24:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:19,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:19,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:20,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3060 [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:24:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:24:22,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:24:22,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:23,268 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:24:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:23,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:23,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:23,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:23,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:23,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244108237] [2020-10-28 00:24:23,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:23,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:24:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475129298] [2020-10-28 00:24:23,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:24:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:24:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:24:23,317 INFO L87 Difference]: Start difference. First operand 33767 states and 48736 transitions. Second operand 6 states. [2020-10-28 00:24:25,132 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:24:29,836 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:24:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:24:39,493 INFO L93 Difference]: Finished difference Result 201345 states and 287152 transitions. [2020-10-28 00:24:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:24:39,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 00:24:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:24:39,767 INFO L225 Difference]: With dead ends: 201345 [2020-10-28 00:24:39,768 INFO L226 Difference]: Without dead ends: 171686 [2020-10-28 00:24:39,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:24:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171686 states. [2020-10-28 00:24:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171686 to 35563. [2020-10-28 00:24:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35563 states. [2020-10-28 00:24:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35563 states to 35563 states and 50768 transitions. [2020-10-28 00:24:43,788 INFO L78 Accepts]: Start accepts. Automaton has 35563 states and 50768 transitions. Word has length 105 [2020-10-28 00:24:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:24:43,788 INFO L481 AbstractCegarLoop]: Abstraction has 35563 states and 50768 transitions. [2020-10-28 00:24:43,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:24:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35563 states and 50768 transitions. [2020-10-28 00:24:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 00:24:43,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:24:43,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:24:43,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:24:43,809 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:24:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:24:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1830823923, now seen corresponding path program 1 times [2020-10-28 00:24:43,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:24:43,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010944401] [2020-10-28 00:24:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:24:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:43,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:44,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:44,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:46,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:46,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 00:24:46,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3038 [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:24:46,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:47,303 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:24:47,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:24:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:24:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:24:47,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:24:47,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:24:47,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:24:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:24:47,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:24:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:24:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:24:47,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:24:47,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:24:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:24:47,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010944401] [2020-10-28 00:24:47,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:24:47,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:24:47,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195189877] [2020-10-28 00:24:47,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:24:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:24:47,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:24:47,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:24:47,335 INFO L87 Difference]: Start difference. First operand 35563 states and 50768 transitions. Second operand 6 states. [2020-10-28 00:24:49,397 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:24:55,656 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-28 00:25:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:25:08,511 INFO L93 Difference]: Finished difference Result 227361 states and 321866 transitions. [2020-10-28 00:25:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:25:08,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-28 00:25:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:25:08,895 INFO L225 Difference]: With dead ends: 227361 [2020-10-28 00:25:08,895 INFO L226 Difference]: Without dead ends: 196040 [2020-10-28 00:25:08,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:25:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196040 states. [2020-10-28 00:25:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196040 to 39069. [2020-10-28 00:25:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39069 states. [2020-10-28 00:25:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39069 states to 39069 states and 54816 transitions. [2020-10-28 00:25:14,065 INFO L78 Accepts]: Start accepts. Automaton has 39069 states and 54816 transitions. Word has length 105 [2020-10-28 00:25:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:25:14,065 INFO L481 AbstractCegarLoop]: Abstraction has 39069 states and 54816 transitions. [2020-10-28 00:25:14,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:25:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 39069 states and 54816 transitions. [2020-10-28 00:25:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:25:14,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:25:14,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:25:14,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:25:14,082 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:25:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:25:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 631356546, now seen corresponding path program 1 times [2020-10-28 00:25:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:25:14,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207599864] [2020-10-28 00:25:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:25:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:14,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:16,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:25:19,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:25:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:19,768 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 00:25:19,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:25:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:25:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:25:19,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:25:19,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:25:19,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:25:19,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:25:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:25:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207599864] [2020-10-28 00:25:19,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:25:19,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:25:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248322146] [2020-10-28 00:25:19,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:25:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:25:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:25:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:25:19,828 INFO L87 Difference]: Start difference. First operand 39069 states and 54816 transitions. Second operand 11 states. [2020-10-28 00:25:20,280 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 00:25:25,086 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 00:25:45,157 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 206