/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:58:35,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:58:35,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:58:36,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:58:36,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:58:36,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:58:36,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:58:36,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:58:36,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:58:36,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:58:36,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:58:36,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:58:36,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:58:36,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:58:36,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:58:36,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:58:36,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:58:36,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:58:36,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:58:36,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:58:36,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:58:36,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:58:36,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:58:36,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:58:36,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:58:36,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:58:36,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:58:36,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:58:36,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:58:36,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:58:36,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:58:36,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:58:36,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:58:36,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:58:36,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:58:36,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:58:36,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:58:36,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:58:36,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:58:36,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:58:36,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:58:36,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:58:36,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:58:36,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:58:36,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:58:36,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:58:36,165 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:58:36,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:58:36,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:58:36,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:58:36,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:58:36,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:58:36,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:58:36,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:58:36,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:58:36,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:58:36,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:58:36,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:58:36,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:58:36,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:58:36,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:58:36,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:58:36,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:58:36,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:58:36,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:58:36,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:58:36,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:58:36,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:58:36,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:58:36,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:58:36,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:58:36,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:58:36,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:58:36,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:58:36,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:58:36,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:58:36,676 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:58:36,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:58:36,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39b54493c/51810803d00d4e399eb8d45bc91f6dc9/FLAG4217a4d59 [2020-10-27 05:58:37,581 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:58:37,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:58:37,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39b54493c/51810803d00d4e399eb8d45bc91f6dc9/FLAG4217a4d59 [2020-10-27 05:58:37,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39b54493c/51810803d00d4e399eb8d45bc91f6dc9 [2020-10-27 05:58:37,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:58:37,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:58:37,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:58:37,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:58:37,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:58:37,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:58:37" (1/1) ... [2020-10-27 05:58:37,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbed540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:37, skipping insertion in model container [2020-10-27 05:58:37,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:58:37" (1/1) ... [2020-10-27 05:58:37,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:58:37,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:58:38,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:58:38,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:58:38,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:58:38,649 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:58:38,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38 WrapperNode [2020-10-27 05:58:38,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:58:38,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:58:38,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:58:38,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:58:38,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... [2020-10-27 05:58:38,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:58:38,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:58:38,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:58:38,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:58:38,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:58:38,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:58:38,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:58:38,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:58:38,911 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:58:38,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:58:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:58:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:58:38,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:58:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:58:38,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:58:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:58:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:58:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:58:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:58:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:58:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:58:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:58:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:58:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:58:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:58:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:58:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:58:40,616 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:58:40,617 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:58:40,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:58:40 BoogieIcfgContainer [2020-10-27 05:58:40,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:58:40,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:58:40,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:58:40,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:58:40,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:58:37" (1/3) ... [2020-10-27 05:58:40,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50445fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:58:40, skipping insertion in model container [2020-10-27 05:58:40,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:58:38" (2/3) ... [2020-10-27 05:58:40,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50445fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:58:40, skipping insertion in model container [2020-10-27 05:58:40,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:58:40" (3/3) ... [2020-10-27 05:58:40,630 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-27 05:58:40,644 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:58:40,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:58:40,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:58:40,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:58:40,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:58:40,699 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:58:40,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:58:40,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:58:40,699 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:58:40,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:58:40,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:58:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states. [2020-10-27 05:58:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 05:58:40,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:40,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:40,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1244911398, now seen corresponding path program 1 times [2020-10-27 05:58:40,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:40,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331877017] [2020-10-27 05:58:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:43,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:43,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:44,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:46,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 05:58:46,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:58:46,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:58:46,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:58:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:58:47,046 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:58:47,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:47,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:47,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:47,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:58:47,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:47,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:47,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331877017] [2020-10-27 05:58:47,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:47,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294769325] [2020-10-27 05:58:47,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:47,243 INFO L87 Difference]: Start difference. First operand 333 states. Second operand 5 states. [2020-10-27 05:58:50,590 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:58:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:51,792 INFO L93 Difference]: Finished difference Result 859 states and 1512 transitions. [2020-10-27 05:58:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:58:51,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 05:58:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:51,812 INFO L225 Difference]: With dead ends: 859 [2020-10-27 05:58:51,812 INFO L226 Difference]: Without dead ends: 624 [2020-10-27 05:58:51,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:58:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2020-10-27 05:58:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 621. [2020-10-27 05:58:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-10-27 05:58:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 902 transitions. [2020-10-27 05:58:51,946 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 902 transitions. Word has length 155 [2020-10-27 05:58:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:51,947 INFO L481 AbstractCegarLoop]: Abstraction has 621 states and 902 transitions. [2020-10-27 05:58:51,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 902 transitions. [2020-10-27 05:58:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 05:58:51,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:51,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:51,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:58:51,955 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1111867204, now seen corresponding path program 1 times [2020-10-27 05:58:51,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:51,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037403451] [2020-10-27 05:58:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:57,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:57,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 05:58:57,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:58:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 05:58:57,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:58:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:58:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:57,541 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:58:57,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:57,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:57,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:57,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:57,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:58:57,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:57,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:57,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:58:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037403451] [2020-10-27 05:58:57,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:57,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852198360] [2020-10-27 05:58:57,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:57,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:57,660 INFO L87 Difference]: Start difference. First operand 621 states and 902 transitions. Second operand 5 states. [2020-10-27 05:58:59,764 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:00,916 INFO L93 Difference]: Finished difference Result 1767 states and 2548 transitions. [2020-10-27 05:59:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:00,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-27 05:59:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:00,924 INFO L225 Difference]: With dead ends: 1767 [2020-10-27 05:59:00,924 INFO L226 Difference]: Without dead ends: 1179 [2020-10-27 05:59:00,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-27 05:59:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1176. [2020-10-27 05:59:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2020-10-27 05:59:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1683 transitions. [2020-10-27 05:59:01,024 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1683 transitions. Word has length 156 [2020-10-27 05:59:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:01,024 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 1683 transitions. [2020-10-27 05:59:01,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1683 transitions. [2020-10-27 05:59:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 05:59:01,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:01,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:01,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:59:01,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1148545251, now seen corresponding path program 1 times [2020-10-27 05:59:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:01,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375380476] [2020-10-27 05:59:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:06,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 05:59:06,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:59:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:59:06,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 05:59:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:06,647 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:06,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:06,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:06,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:06,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:06,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:59:06,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:06,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375380476] [2020-10-27 05:59:06,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:06,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:06,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546825252] [2020-10-27 05:59:06,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:06,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:06,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:06,782 INFO L87 Difference]: Start difference. First operand 1176 states and 1683 transitions. Second operand 5 states. [2020-10-27 05:59:09,225 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:10,421 INFO L93 Difference]: Finished difference Result 3078 states and 4414 transitions. [2020-10-27 05:59:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:10,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 05:59:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:10,435 INFO L225 Difference]: With dead ends: 3078 [2020-10-27 05:59:10,435 INFO L226 Difference]: Without dead ends: 2245 [2020-10-27 05:59:10,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-10-27 05:59:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2242. [2020-10-27 05:59:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2242 states. [2020-10-27 05:59:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3164 transitions. [2020-10-27 05:59:10,642 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3164 transitions. Word has length 157 [2020-10-27 05:59:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:10,643 INFO L481 AbstractCegarLoop]: Abstraction has 2242 states and 3164 transitions. [2020-10-27 05:59:10,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3164 transitions. [2020-10-27 05:59:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 05:59:10,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:10,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:10,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:59:10,650 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1626133222, now seen corresponding path program 1 times [2020-10-27 05:59:10,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:10,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935947002] [2020-10-27 05:59:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:10,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:11,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:13,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:15,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:59:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:16,247 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:16,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:16,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:16,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:16,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:59:16,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:16,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:16,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:16,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:16,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:16,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935947002] [2020-10-27 05:59:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061208619] [2020-10-27 05:59:16,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:16,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:16,376 INFO L87 Difference]: Start difference. First operand 2242 states and 3164 transitions. Second operand 5 states. [2020-10-27 05:59:18,963 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:20,117 INFO L93 Difference]: Finished difference Result 6564 states and 9224 transitions. [2020-10-27 05:59:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:20,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-27 05:59:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:20,141 INFO L225 Difference]: With dead ends: 6564 [2020-10-27 05:59:20,141 INFO L226 Difference]: Without dead ends: 4366 [2020-10-27 05:59:20,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2020-10-27 05:59:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 4363. [2020-10-27 05:59:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4363 states. [2020-10-27 05:59:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 6084 transitions. [2020-10-27 05:59:20,501 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 6084 transitions. Word has length 158 [2020-10-27 05:59:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:20,502 INFO L481 AbstractCegarLoop]: Abstraction has 4363 states and 6084 transitions. [2020-10-27 05:59:20,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 6084 transitions. [2020-10-27 05:59:20,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 05:59:20,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:20,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:20,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:59:20,512 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1399895421, now seen corresponding path program 1 times [2020-10-27 05:59:20,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:20,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792090607] [2020-10-27 05:59:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:20,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:20,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:25,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:25,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 05:59:25,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:59:25,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:59:25,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:25,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:59:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:26,054 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:26,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:26,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:26,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:26,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792090607] [2020-10-27 05:59:26,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:26,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:26,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989791584] [2020-10-27 05:59:26,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:26,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:26,135 INFO L87 Difference]: Start difference. First operand 4363 states and 6084 transitions. Second operand 5 states. [2020-10-27 05:59:28,522 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:29,794 INFO L93 Difference]: Finished difference Result 12319 states and 17159 transitions. [2020-10-27 05:59:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:29,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-27 05:59:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:29,837 INFO L225 Difference]: With dead ends: 12319 [2020-10-27 05:59:29,837 INFO L226 Difference]: Without dead ends: 8448 [2020-10-27 05:59:29,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2020-10-27 05:59:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 8445. [2020-10-27 05:59:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8445 states. [2020-10-27 05:59:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8445 states to 8445 states and 11613 transitions. [2020-10-27 05:59:30,579 INFO L78 Accepts]: Start accepts. Automaton has 8445 states and 11613 transitions. Word has length 159 [2020-10-27 05:59:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:30,580 INFO L481 AbstractCegarLoop]: Abstraction has 8445 states and 11613 transitions. [2020-10-27 05:59:30,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 8445 states and 11613 transitions. [2020-10-27 05:59:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 05:59:30,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:30,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:30,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:59:30,597 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1026425977, now seen corresponding path program 1 times [2020-10-27 05:59:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:30,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117974713] [2020-10-27 05:59:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:35,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 05:59:35,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:36,155 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:36,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:36,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:36,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:36,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:36,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117974713] [2020-10-27 05:59:36,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:36,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681257159] [2020-10-27 05:59:36,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:36,260 INFO L87 Difference]: Start difference. First operand 8445 states and 11613 transitions. Second operand 5 states. [2020-10-27 05:59:38,986 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:40,431 INFO L93 Difference]: Finished difference Result 22573 states and 31102 transitions. [2020-10-27 05:59:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:40,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-27 05:59:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:40,490 INFO L225 Difference]: With dead ends: 22573 [2020-10-27 05:59:40,490 INFO L226 Difference]: Without dead ends: 16186 [2020-10-27 05:59:40,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:59:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16186 states. [2020-10-27 05:59:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16186 to 16183. [2020-10-27 05:59:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16183 states. [2020-10-27 05:59:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16183 states to 16183 states and 21866 transitions. [2020-10-27 05:59:41,892 INFO L78 Accepts]: Start accepts. Automaton has 16183 states and 21866 transitions. Word has length 160 [2020-10-27 05:59:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:41,892 INFO L481 AbstractCegarLoop]: Abstraction has 16183 states and 21866 transitions. [2020-10-27 05:59:41,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16183 states and 21866 transitions. [2020-10-27 05:59:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 05:59:41,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:41,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:41,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:59:41,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1695828643, now seen corresponding path program 1 times [2020-10-27 05:59:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:41,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632769344] [2020-10-27 05:59:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:42,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:46,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:46,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 05:59:46,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:59:46,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:59:46,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:59:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:59:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:47,456 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:47,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:47,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:47,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:47,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:47,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:59:47,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:47,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:47,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:47,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632769344] [2020-10-27 05:59:47,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:47,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:47,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286437464] [2020-10-27 05:59:47,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:47,537 INFO L87 Difference]: Start difference. First operand 16183 states and 21866 transitions. Second operand 5 states. [2020-10-27 05:59:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:49,831 INFO L93 Difference]: Finished difference Result 26487 states and 35749 transitions. [2020-10-27 05:59:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:59:49,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-27 05:59:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:49,854 INFO L225 Difference]: With dead ends: 26487 [2020-10-27 05:59:49,854 INFO L226 Difference]: Without dead ends: 10412 [2020-10-27 05:59:49,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:59:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2020-10-27 05:59:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 10412. [2020-10-27 05:59:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10412 states. [2020-10-27 05:59:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10412 states to 10412 states and 14051 transitions. [2020-10-27 05:59:50,695 INFO L78 Accepts]: Start accepts. Automaton has 10412 states and 14051 transitions. Word has length 161 [2020-10-27 05:59:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:50,695 INFO L481 AbstractCegarLoop]: Abstraction has 10412 states and 14051 transitions. [2020-10-27 05:59:50,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10412 states and 14051 transitions. [2020-10-27 05:59:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 05:59:50,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:50,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:59:50,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:59:50,713 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1073352545, now seen corresponding path program 1 times [2020-10-27 05:59:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:50,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373880924] [2020-10-27 05:59:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:50,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:50,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:51,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:55,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:55,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 05:59:55,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:59:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:59:55,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:59:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:59:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 05:59:55,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:56,263 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:59:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:56,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:56,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:56,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:59:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:59:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373880924] [2020-10-27 05:59:56,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:56,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:59:56,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110400556] [2020-10-27 05:59:56,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:59:56,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:59:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:59:56,367 INFO L87 Difference]: Start difference. First operand 10412 states and 14051 transitions. Second operand 9 states. [2020-10-27 05:59:56,920 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 05:59:59,219 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 05:59:59,660 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:01,415 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:01,872 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 06:00:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:02,840 INFO L93 Difference]: Finished difference Result 32156 states and 45873 transitions. [2020-10-27 06:00:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:00:02,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2020-10-27 06:00:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:02,896 INFO L225 Difference]: With dead ends: 32156 [2020-10-27 06:00:02,896 INFO L226 Difference]: Without dead ends: 24733 [2020-10-27 06:00:02,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 06:00:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24733 states. [2020-10-27 06:00:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24733 to 14748. [2020-10-27 06:00:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14748 states. [2020-10-27 06:00:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14748 states to 14748 states and 20155 transitions. [2020-10-27 06:00:04,117 INFO L78 Accepts]: Start accepts. Automaton has 14748 states and 20155 transitions. Word has length 164 [2020-10-27 06:00:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:04,118 INFO L481 AbstractCegarLoop]: Abstraction has 14748 states and 20155 transitions. [2020-10-27 06:00:04,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:00:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 14748 states and 20155 transitions. [2020-10-27 06:00:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 06:00:04,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:04,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:04,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:00:04,130 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:04,130 INFO L82 PathProgramCache]: Analyzing trace with hash 195229835, now seen corresponding path program 1 times [2020-10-27 06:00:04,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296368096] [2020-10-27 06:00:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:04,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:04,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:09,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:09,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 06:00:09,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 06:00:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 06:00:09,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 06:00:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 06:00:09,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:09,639 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:09,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296368096] [2020-10-27 06:00:09,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:09,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070114412] [2020-10-27 06:00:09,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:09,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:09,696 INFO L87 Difference]: Start difference. First operand 14748 states and 20155 transitions. Second operand 5 states. [2020-10-27 06:00:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:12,376 INFO L93 Difference]: Finished difference Result 26347 states and 36009 transitions. [2020-10-27 06:00:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:12,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-27 06:00:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:12,403 INFO L225 Difference]: With dead ends: 26347 [2020-10-27 06:00:12,404 INFO L226 Difference]: Without dead ends: 11842 [2020-10-27 06:00:12,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:00:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11842 states. [2020-10-27 06:00:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11842 to 11842. [2020-10-27 06:00:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11842 states. [2020-10-27 06:00:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11842 states to 11842 states and 16142 transitions. [2020-10-27 06:00:13,436 INFO L78 Accepts]: Start accepts. Automaton has 11842 states and 16142 transitions. Word has length 164 [2020-10-27 06:00:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:13,436 INFO L481 AbstractCegarLoop]: Abstraction has 11842 states and 16142 transitions. [2020-10-27 06:00:13,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 11842 states and 16142 transitions. [2020-10-27 06:00:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 06:00:13,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:13,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:13,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:00:13,447 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1350421697, now seen corresponding path program 1 times [2020-10-27 06:00:13,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:13,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337790458] [2020-10-27 06:00:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:13,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:18,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:18,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 06:00:18,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:00:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 06:00:18,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 06:00:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 06:00:18,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:18,960 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:18,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:18,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:19,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337790458] [2020-10-27 06:00:19,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:19,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:19,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970970813] [2020-10-27 06:00:19,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:19,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:19,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:19,011 INFO L87 Difference]: Start difference. First operand 11842 states and 16142 transitions. Second operand 5 states. [2020-10-27 06:00:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:21,325 INFO L93 Difference]: Finished difference Result 19810 states and 26946 transitions. [2020-10-27 06:00:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:21,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-27 06:00:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:21,341 INFO L225 Difference]: With dead ends: 19810 [2020-10-27 06:00:21,341 INFO L226 Difference]: Without dead ends: 8065 [2020-10-27 06:00:21,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:00:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2020-10-27 06:00:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 8065. [2020-10-27 06:00:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8065 states. [2020-10-27 06:00:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8065 states to 8065 states and 10944 transitions. [2020-10-27 06:00:22,160 INFO L78 Accepts]: Start accepts. Automaton has 8065 states and 10944 transitions. Word has length 165 [2020-10-27 06:00:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:22,161 INFO L481 AbstractCegarLoop]: Abstraction has 8065 states and 10944 transitions. [2020-10-27 06:00:22,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8065 states and 10944 transitions. [2020-10-27 06:00:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 06:00:22,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:22,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:22,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:00:22,168 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1109417923, now seen corresponding path program 1 times [2020-10-27 06:00:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:22,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698692772] [2020-10-27 06:00:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:22,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:22,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:24,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:27,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:27,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-27 06:00:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:27,758 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:27,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:27,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:27,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:27,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:27,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 06:00:27,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:27,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:00:27,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:27,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:00:27,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:27,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698692772] [2020-10-27 06:00:27,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:27,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:00:27,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559485816] [2020-10-27 06:00:27,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:00:27,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:00:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:00:27,879 INFO L87 Difference]: Start difference. First operand 8065 states and 10944 transitions. Second operand 9 states. [2020-10-27 06:00:28,380 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:00:30,539 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 06:00:31,014 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:32,654 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:33,171 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 06:00:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:34,094 INFO L93 Difference]: Finished difference Result 25542 states and 35840 transitions. [2020-10-27 06:00:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:00:34,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 169 [2020-10-27 06:00:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:34,115 INFO L225 Difference]: With dead ends: 25542 [2020-10-27 06:00:34,116 INFO L226 Difference]: Without dead ends: 19145 [2020-10-27 06:00:34,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:00:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19145 states. [2020-10-27 06:00:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19145 to 12945. [2020-10-27 06:00:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12945 states. [2020-10-27 06:00:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 17545 transitions. [2020-10-27 06:00:35,369 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 17545 transitions. Word has length 169 [2020-10-27 06:00:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:35,369 INFO L481 AbstractCegarLoop]: Abstraction has 12945 states and 17545 transitions. [2020-10-27 06:00:35,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:00:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 17545 transitions. [2020-10-27 06:00:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 06:00:35,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:35,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:35,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 06:00:35,378 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash -932900671, now seen corresponding path program 1 times [2020-10-27 06:00:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:35,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562453375] [2020-10-27 06:00:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:35,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:35,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:35,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:35,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:37,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:00:40,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:40,851 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:40,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:40,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:40,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:40,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562453375] [2020-10-27 06:00:40,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:40,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:00:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461559746] [2020-10-27 06:00:40,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:00:40,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:00:40,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:40,901 INFO L87 Difference]: Start difference. First operand 12945 states and 17545 transitions. Second operand 5 states. [2020-10-27 06:00:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:43,528 INFO L93 Difference]: Finished difference Result 23843 states and 32271 transitions. [2020-10-27 06:00:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:43,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-27 06:00:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:43,540 INFO L225 Difference]: With dead ends: 23843 [2020-10-27 06:00:43,540 INFO L226 Difference]: Without dead ends: 11033 [2020-10-27 06:00:43,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:00:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11033 states. [2020-10-27 06:00:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11033 to 11024. [2020-10-27 06:00:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11024 states. [2020-10-27 06:00:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11024 states to 11024 states and 14897 transitions. [2020-10-27 06:00:44,521 INFO L78 Accepts]: Start accepts. Automaton has 11024 states and 14897 transitions. Word has length 169 [2020-10-27 06:00:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 11024 states and 14897 transitions. [2020-10-27 06:00:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:00:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 14897 transitions. [2020-10-27 06:00:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 06:00:44,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:44,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:44,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 06:00:44,531 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2023285876, now seen corresponding path program 1 times [2020-10-27 06:00:44,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:44,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212130208] [2020-10-27 06:00:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:44,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:49,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:49,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 06:00:49,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 06:00:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:50,062 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:00:50,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:50,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:50,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:50,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:00:50,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:50,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:00:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:00:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:00:50,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212130208] [2020-10-27 06:00:50,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:50,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:00:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324068069] [2020-10-27 06:00:50,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:00:50,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:00:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:00:50,156 INFO L87 Difference]: Start difference. First operand 11024 states and 14897 transitions. Second operand 9 states. [2020-10-27 06:00:50,621 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:00:53,265 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 06:00:53,724 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:55,480 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:00:55,988 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 06:00:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:57,702 INFO L93 Difference]: Finished difference Result 35666 states and 49381 transitions. [2020-10-27 06:00:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:00:57,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2020-10-27 06:00:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:57,736 INFO L225 Difference]: With dead ends: 35666 [2020-10-27 06:00:57,736 INFO L226 Difference]: Without dead ends: 29070 [2020-10-27 06:00:57,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:00:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29070 states. [2020-10-27 06:00:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29070 to 17543. [2020-10-27 06:00:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17543 states. [2020-10-27 06:00:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17543 states to 17543 states and 23712 transitions. [2020-10-27 06:00:59,517 INFO L78 Accepts]: Start accepts. Automaton has 17543 states and 23712 transitions. Word has length 171 [2020-10-27 06:00:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:59,518 INFO L481 AbstractCegarLoop]: Abstraction has 17543 states and 23712 transitions. [2020-10-27 06:00:59,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:00:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 17543 states and 23712 transitions. [2020-10-27 06:00:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 06:00:59,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:59,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:00:59,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 06:00:59,528 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -72177804, now seen corresponding path program 1 times [2020-10-27 06:00:59,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:59,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118645637] [2020-10-27 06:00:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:59,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:00,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:01:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 06:01:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:05,120 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:05,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:05,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:05,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:05,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:01:05,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:05,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:05,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118645637] [2020-10-27 06:01:05,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:05,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:01:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166586832] [2020-10-27 06:01:05,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:01:05,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:01:05,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:05,165 INFO L87 Difference]: Start difference. First operand 17543 states and 23712 transitions. Second operand 5 states. [2020-10-27 06:01:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:09,530 INFO L93 Difference]: Finished difference Result 30457 states and 41183 transitions. [2020-10-27 06:01:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:01:09,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-10-27 06:01:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:09,554 INFO L225 Difference]: With dead ends: 30457 [2020-10-27 06:01:09,554 INFO L226 Difference]: Without dead ends: 17535 [2020-10-27 06:01:09,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:01:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17535 states. [2020-10-27 06:01:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17535 to 17534. [2020-10-27 06:01:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17534 states. [2020-10-27 06:01:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 23683 transitions. [2020-10-27 06:01:11,499 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 23683 transitions. Word has length 171 [2020-10-27 06:01:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:11,499 INFO L481 AbstractCegarLoop]: Abstraction has 17534 states and 23683 transitions. [2020-10-27 06:01:11,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:01:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 23683 transitions. [2020-10-27 06:01:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 06:01:11,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:11,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:11,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 06:01:11,507 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:11,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1652834592, now seen corresponding path program 1 times [2020-10-27 06:01:11,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:11,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96180612] [2020-10-27 06:01:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:11,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:01:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:01:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 06:01:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:17,065 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:17,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:17,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:17,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 06:01:17,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:01:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:01:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:17,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96180612] [2020-10-27 06:01:17,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:17,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:01:17,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436278916] [2020-10-27 06:01:17,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:01:17,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:17,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:01:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:01:17,168 INFO L87 Difference]: Start difference. First operand 17534 states and 23683 transitions. Second operand 9 states. [2020-10-27 06:01:17,651 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:01:20,397 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 06:01:20,829 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:01:22,773 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 06:01:23,401 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 06:01:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:26,717 INFO L93 Difference]: Finished difference Result 52058 states and 71701 transitions. [2020-10-27 06:01:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 06:01:26,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2020-10-27 06:01:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:26,942 INFO L225 Difference]: With dead ends: 52058 [2020-10-27 06:01:26,942 INFO L226 Difference]: Without dead ends: 41633 [2020-10-27 06:01:26,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:01:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41633 states. [2020-10-27 06:01:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41633 to 22896. [2020-10-27 06:01:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22896 states. [2020-10-27 06:01:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22896 states to 22896 states and 30899 transitions. [2020-10-27 06:01:29,787 INFO L78 Accepts]: Start accepts. Automaton has 22896 states and 30899 transitions. Word has length 172 [2020-10-27 06:01:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:29,787 INFO L481 AbstractCegarLoop]: Abstraction has 22896 states and 30899 transitions. [2020-10-27 06:01:29,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:01:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22896 states and 30899 transitions. [2020-10-27 06:01:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 06:01:29,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:29,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:29,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 06:01:29,796 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1728289347, now seen corresponding path program 1 times [2020-10-27 06:01:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:29,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628599060] [2020-10-27 06:01:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:29,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:31,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:31,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 06:01:31,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1707 [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 06:01:31,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:31,965 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:31,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:31,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:31,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:32,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628599060] [2020-10-27 06:01:32,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:32,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:01:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437751823] [2020-10-27 06:01:32,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:01:32,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:01:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:01:32,072 INFO L87 Difference]: Start difference. First operand 22896 states and 30899 transitions. Second operand 4 states. [2020-10-27 06:01:32,505 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-27 06:01:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:38,990 INFO L93 Difference]: Finished difference Result 55377 states and 77354 transitions. [2020-10-27 06:01:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:01:38,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-10-27 06:01:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:39,045 INFO L225 Difference]: With dead ends: 55377 [2020-10-27 06:01:39,045 INFO L226 Difference]: Without dead ends: 40767 [2020-10-27 06:01:39,062 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 [2020-10-27 06:01:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40767 states. [2020-10-27 06:01:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40767 to 40764. [2020-10-27 06:01:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40764 states. [2020-10-27 06:01:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40764 states to 40764 states and 55848 transitions. [2020-10-27 06:01:44,534 INFO L78 Accepts]: Start accepts. Automaton has 40764 states and 55848 transitions. Word has length 172 [2020-10-27 06:01:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:44,534 INFO L481 AbstractCegarLoop]: Abstraction has 40764 states and 55848 transitions. [2020-10-27 06:01:44,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:01:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40764 states and 55848 transitions. [2020-10-27 06:01:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 06:01:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:44,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:44,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 06:01:44,550 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1978343093, now seen corresponding path program 1 times [2020-10-27 06:01:44,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:44,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064487174] [2020-10-27 06:01:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:45,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 06:01:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:45,952 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:01:45,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:01:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:45,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:01:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:01:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:01:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:01:46,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064487174] [2020-10-27 06:01:46,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:01:46,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:01:46,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093284616] [2020-10-27 06:01:46,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:01:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:01:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:01:46,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:01:46,003 INFO L87 Difference]: Start difference. First operand 40764 states and 55848 transitions. Second operand 4 states. [2020-10-27 06:01:50,269 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-27 06:01:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:01:53,929 INFO L93 Difference]: Finished difference Result 76782 states and 107462 transitions. [2020-10-27 06:01:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:01:53,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-10-27 06:01:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:01:53,985 INFO L225 Difference]: With dead ends: 76782 [2020-10-27 06:01:53,985 INFO L226 Difference]: Without dead ends: 39161 [2020-10-27 06:01:54,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:01:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39161 states. [2020-10-27 06:01:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39161 to 38692. [2020-10-27 06:01:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38692 states. [2020-10-27 06:01:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38692 states to 38692 states and 54159 transitions. [2020-10-27 06:01:59,146 INFO L78 Accepts]: Start accepts. Automaton has 38692 states and 54159 transitions. Word has length 172 [2020-10-27 06:01:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:01:59,146 INFO L481 AbstractCegarLoop]: Abstraction has 38692 states and 54159 transitions. [2020-10-27 06:01:59,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:01:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 38692 states and 54159 transitions. [2020-10-27 06:01:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 06:01:59,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:01:59,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:01:59,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 06:01:59,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:01:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:01:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1004283519, now seen corresponding path program 1 times [2020-10-27 06:01:59,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:01:59,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709813621] [2020-10-27 06:01:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:01:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:01:59,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:01:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:01,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:01,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 06:02:01,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2341 [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 06:02:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:01,988 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:02:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:02,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:02,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:02,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:02,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 06:02:02,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:02,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:02:02,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:02,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:02:02,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709813621] [2020-10-27 06:02:02,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:02,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:02:02,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699380387] [2020-10-27 06:02:02,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:02:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:02:02,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:02:02,056 INFO L87 Difference]: Start difference. First operand 38692 states and 54159 transitions. Second operand 6 states. [2020-10-27 06:02:02,530 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 06:02:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:02:09,534 INFO L93 Difference]: Finished difference Result 76240 states and 107088 transitions. [2020-10-27 06:02:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:02:09,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2020-10-27 06:02:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:02:09,586 INFO L225 Difference]: With dead ends: 76240 [2020-10-27 06:02:09,587 INFO L226 Difference]: Without dead ends: 38415 [2020-10-27 06:02:09,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:02:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38415 states. [2020-10-27 06:02:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38415 to 38415. [2020-10-27 06:02:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38415 states. [2020-10-27 06:02:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38415 states to 38415 states and 53382 transitions. [2020-10-27 06:02:14,804 INFO L78 Accepts]: Start accepts. Automaton has 38415 states and 53382 transitions. Word has length 175 [2020-10-27 06:02:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:02:14,805 INFO L481 AbstractCegarLoop]: Abstraction has 38415 states and 53382 transitions. [2020-10-27 06:02:14,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:02:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 38415 states and 53382 transitions. [2020-10-27 06:02:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 06:02:14,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:02:14,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:02:14,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 06:02:14,820 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:02:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:02:14,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1155072124, now seen corresponding path program 1 times [2020-10-27 06:02:14,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:02:14,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934028877] [2020-10-27 06:02:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:02:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:14,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:02:15,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 06:02:15,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 06:02:15,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:15,850 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 06:02:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:02:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:02:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:02:15,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:02:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:02:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:02:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934028877] [2020-10-27 06:02:15,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:02:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:02:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286574915] [2020-10-27 06:02:15,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:02:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:02:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:02:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:02:15,900 INFO L87 Difference]: Start difference. First operand 38415 states and 53382 transitions. Second operand 4 states.