/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:34:52,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:34:52,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:34:52,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:34:52,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:34:52,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:34:52,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:34:52,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:34:52,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:34:52,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:34:52,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:34:52,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:34:52,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:34:52,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:34:52,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:34:52,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:34:52,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:34:52,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:34:52,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:34:52,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:34:52,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:34:52,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:34:52,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:34:52,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:34:52,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:34:52,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:34:52,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:34:52,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:34:52,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:34:52,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:34:52,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:34:52,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:34:52,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:34:52,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:34:52,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:34:52,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:34:52,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:34:52,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:34:52,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:34:52,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:34:52,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:34:52,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:34:52,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:34:52,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:34:52,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:34:52,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:34:52,892 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:34:52,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:34:52,892 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:34:52,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:34:52,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:34:52,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:34:52,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:34:52,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:34:52,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:34:52,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:34:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:34:52,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:34:52,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:34:52,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:34:52,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:34:52,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:34:52,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:34:52,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:34:52,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:34:52,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:34:52,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:34:52,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:34:52,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:34:52,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:34:52,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:34:52,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:34:53,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:34:53,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:34:53,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:34:53,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:34:53,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:34:53,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:34:53,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b21cd0e/6166b02dd52d4fd985110c6e002ac887/FLAG423c8924a [2020-10-28 00:34:54,109 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:34:54,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:34:54,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b21cd0e/6166b02dd52d4fd985110c6e002ac887/FLAG423c8924a [2020-10-28 00:34:54,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b21cd0e/6166b02dd52d4fd985110c6e002ac887 [2020-10-28 00:34:54,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:34:54,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:34:54,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:34:54,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:34:54,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:34:54,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:34:54" (1/1) ... [2020-10-28 00:34:54,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1047a4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:54, skipping insertion in model container [2020-10-28 00:34:54,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:34:54" (1/1) ... [2020-10-28 00:34:54,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:34:54,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:34:54,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:34:54,849 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:34:55,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:34:55,037 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:34:55,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55 WrapperNode [2020-10-28 00:34:55,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:34:55,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:34:55,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:34:55,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:34:55,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... [2020-10-28 00:34:55,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:34:55,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:34:55,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:34:55,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:34:55,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:34:55,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:34:55,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:34:55,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:34:55,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:34:55,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:34:55,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:34:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:34:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:34:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:34:55,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:34:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:34:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:34:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:34:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:34:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:34:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:34:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:34:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:34:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:34:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:34:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:34:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:34:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:34:57,239 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:34:57,239 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:34:57,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:34:57 BoogieIcfgContainer [2020-10-28 00:34:57,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:34:57,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:34:57,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:34:57,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:34:57,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:34:54" (1/3) ... [2020-10-28 00:34:57,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629cb61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:34:57, skipping insertion in model container [2020-10-28 00:34:57,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:34:55" (2/3) ... [2020-10-28 00:34:57,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629cb61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:34:57, skipping insertion in model container [2020-10-28 00:34:57,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:34:57" (3/3) ... [2020-10-28 00:34:57,251 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 00:34:57,263 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:34:57,269 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:34:57,282 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:34:57,312 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:34:57,312 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:34:57,312 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:34:57,312 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:34:57,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:34:57,313 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:34:57,313 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:34:57,313 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:34:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states. [2020-10-28 00:34:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 00:34:57,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:34:57,358 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] [2020-10-28 00:34:57,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:34:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:34:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -566979542, now seen corresponding path program 1 times [2020-10-28 00:34:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:34:57,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060401248] [2020-10-28 00:34:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:34:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:34:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:58,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:58,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:34:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:02,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:02,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 00:35:02,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:35:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:35:02,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:35:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-28 00:35:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:35:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:35:03,994 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:04,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:04,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:04,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:04,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 00:35:04,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:04,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:04,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:04,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060401248] [2020-10-28 00:35:04,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:04,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:35:04,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035012750] [2020-10-28 00:35:04,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:35:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:35:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:35:04,131 INFO L87 Difference]: Start difference. First operand 351 states. Second operand 7 states. [2020-10-28 00:35:04,973 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 00:35:08,361 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:35:09,077 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:09,733 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:10,522 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:35:11,218 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:35:11,893 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:12,061 INFO L93 Difference]: Finished difference Result 1559 states and 2652 transitions. [2020-10-28 00:35:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 00:35:12,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-28 00:35:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:12,100 INFO L225 Difference]: With dead ends: 1559 [2020-10-28 00:35:12,100 INFO L226 Difference]: Without dead ends: 1373 [2020-10-28 00:35:12,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:35:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2020-10-28 00:35:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 488. [2020-10-28 00:35:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-28 00:35:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 809 transitions. [2020-10-28 00:35:12,244 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 809 transitions. Word has length 123 [2020-10-28 00:35:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:12,245 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 809 transitions. [2020-10-28 00:35:12,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:35:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 809 transitions. [2020-10-28 00:35:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 00:35:12,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:12,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:35:12,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:35:12,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1846260975, now seen corresponding path program 1 times [2020-10-28 00:35:12,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:12,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198543116] [2020-10-28 00:35:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:12,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:12,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:12,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:17,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:17,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 00:35:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:35:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 00:35:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 00:35:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:35:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:18,080 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:18,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:18,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:18,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:18,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:18,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198543116] [2020-10-28 00:35:18,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:18,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 00:35:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838711861] [2020-10-28 00:35:18,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 00:35:18,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 00:35:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:35:18,164 INFO L87 Difference]: Start difference. First operand 488 states and 809 transitions. Second operand 8 states. [2020-10-28 00:35:18,940 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-28 00:35:21,871 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:35:22,546 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:35:23,333 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:23,988 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:24,757 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:35:25,474 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:35:26,159 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:35:27,388 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:35:28,062 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-28 00:35:29,347 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:35:30,023 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:30,051 INFO L93 Difference]: Finished difference Result 3576 states and 5998 transitions. [2020-10-28 00:35:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 00:35:30,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-10-28 00:35:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:30,071 INFO L225 Difference]: With dead ends: 3576 [2020-10-28 00:35:30,071 INFO L226 Difference]: Without dead ends: 3285 [2020-10-28 00:35:30,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-28 00:35:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2020-10-28 00:35:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 1277. [2020-10-28 00:35:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-10-28 00:35:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 2138 transitions. [2020-10-28 00:35:30,211 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 2138 transitions. Word has length 124 [2020-10-28 00:35:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:30,212 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 2138 transitions. [2020-10-28 00:35:30,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 00:35:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 2138 transitions. [2020-10-28 00:35:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 00:35:30,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:30,215 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] [2020-10-28 00:35:30,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:35:30,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash -511395613, now seen corresponding path program 1 times [2020-10-28 00:35:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:30,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647460899] [2020-10-28 00:35:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:30,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:31,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:31,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:35,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:35,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 00:35:35,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:35,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 00:35:35,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:35,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:35:35,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 00:35:35,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:35:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:36,205 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:36,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:36,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:36,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:36,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:36,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:35:36,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:35:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647460899] [2020-10-28 00:35:36,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:36,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:35:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791504751] [2020-10-28 00:35:36,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:35:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:36,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:35:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:36,303 INFO L87 Difference]: Start difference. First operand 1277 states and 2138 transitions. Second operand 5 states. [2020-10-28 00:35:36,962 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:39,657 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:39,827 INFO L93 Difference]: Finished difference Result 4243 states and 7136 transitions. [2020-10-28 00:35:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:35:39,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-28 00:35:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:39,846 INFO L225 Difference]: With dead ends: 4243 [2020-10-28 00:35:39,847 INFO L226 Difference]: Without dead ends: 3269 [2020-10-28 00:35:39,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:35:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2020-10-28 00:35:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2285. [2020-10-28 00:35:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2285 states. [2020-10-28 00:35:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3834 transitions. [2020-10-28 00:35:40,026 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3834 transitions. Word has length 125 [2020-10-28 00:35:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:40,027 INFO L481 AbstractCegarLoop]: Abstraction has 2285 states and 3834 transitions. [2020-10-28 00:35:40,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:35:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3834 transitions. [2020-10-28 00:35:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 00:35:40,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:40,030 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] [2020-10-28 00:35:40,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:35:40,031 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash -443007096, now seen corresponding path program 1 times [2020-10-28 00:35:40,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:40,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046014982] [2020-10-28 00:35:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:40,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:41,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:45,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:45,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 00:35:45,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:35:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:45,761 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:45,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:45,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:45,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:45,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:45,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:35:45,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:45,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:45,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:45,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046014982] [2020-10-28 00:35:45,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:45,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:35:45,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327804311] [2020-10-28 00:35:45,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:35:45,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:35:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:45,839 INFO L87 Difference]: Start difference. First operand 2285 states and 3834 transitions. Second operand 5 states. [2020-10-28 00:35:46,518 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:49,128 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:49,417 INFO L93 Difference]: Finished difference Result 8123 states and 13662 transitions. [2020-10-28 00:35:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:35:49,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-28 00:35:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:49,450 INFO L225 Difference]: With dead ends: 8123 [2020-10-28 00:35:49,450 INFO L226 Difference]: Without dead ends: 6185 [2020-10-28 00:35:49,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:35:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2020-10-28 00:35:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 4230. [2020-10-28 00:35:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4230 states. [2020-10-28 00:35:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 7100 transitions. [2020-10-28 00:35:49,797 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 7100 transitions. Word has length 126 [2020-10-28 00:35:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:35:49,798 INFO L481 AbstractCegarLoop]: Abstraction has 4230 states and 7100 transitions. [2020-10-28 00:35:49,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:35:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 7100 transitions. [2020-10-28 00:35:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 00:35:49,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:35:49,801 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] [2020-10-28 00:35:49,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:35:49,802 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:35:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:35:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1818335644, now seen corresponding path program 1 times [2020-10-28 00:35:49,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:35:49,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108363232] [2020-10-28 00:35:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:35:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:49,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:50,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:51,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:54,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:54,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 00:35:54,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:35:54,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:35:54,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:54,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:35:54,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 00:35:54,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:35:54,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:55,512 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:35:55,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:35:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:35:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:35:55,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:35:55,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:35:55,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:35:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:35:55,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108363232] [2020-10-28 00:35:55,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:35:55,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:35:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398592906] [2020-10-28 00:35:55,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:35:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:35:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:35:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:35:55,583 INFO L87 Difference]: Start difference. First operand 4230 states and 7100 transitions. Second operand 5 states. [2020-10-28 00:35:56,261 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:35:58,888 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:35:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:35:59,319 INFO L93 Difference]: Finished difference Result 15807 states and 26558 transitions. [2020-10-28 00:35:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:35:59,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-28 00:35:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:35:59,383 INFO L225 Difference]: With dead ends: 15807 [2020-10-28 00:35:59,383 INFO L226 Difference]: Without dead ends: 11948 [2020-10-28 00:35:59,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:35:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2020-10-28 00:36:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 8058. [2020-10-28 00:36:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8058 states. [2020-10-28 00:36:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 13512 transitions. [2020-10-28 00:36:00,059 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 13512 transitions. Word has length 127 [2020-10-28 00:36:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:00,060 INFO L481 AbstractCegarLoop]: Abstraction has 8058 states and 13512 transitions. [2020-10-28 00:36:00,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:36:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 13512 transitions. [2020-10-28 00:36:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:36:00,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:00,063 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] [2020-10-28 00:36:00,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:36:00,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:00,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1061717620, now seen corresponding path program 1 times [2020-10-28 00:36:00,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794625003] [2020-10-28 00:36:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:00,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:00,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:00,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:00,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:01,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:05,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:36:05,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 00:36:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:05,797 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:05,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:05,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:05,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:05,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794625003] [2020-10-28 00:36:05,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:05,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535793904] [2020-10-28 00:36:05,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:05,854 INFO L87 Difference]: Start difference. First operand 8058 states and 13512 transitions. Second operand 4 states. [2020-10-28 00:36:06,573 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:36:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:09,890 INFO L93 Difference]: Finished difference Result 21919 states and 36745 transitions. [2020-10-28 00:36:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:09,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:36:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:09,925 INFO L225 Difference]: With dead ends: 21919 [2020-10-28 00:36:09,925 INFO L226 Difference]: Without dead ends: 14080 [2020-10-28 00:36:09,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2020-10-28 00:36:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 14077. [2020-10-28 00:36:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14077 states. [2020-10-28 00:36:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14077 states to 14077 states and 23527 transitions. [2020-10-28 00:36:10,844 INFO L78 Accepts]: Start accepts. Automaton has 14077 states and 23527 transitions. Word has length 128 [2020-10-28 00:36:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:10,845 INFO L481 AbstractCegarLoop]: Abstraction has 14077 states and 23527 transitions. [2020-10-28 00:36:10,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 14077 states and 23527 transitions. [2020-10-28 00:36:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:36:10,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:10,848 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] [2020-10-28 00:36:10,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:36:10,848 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1210362159, now seen corresponding path program 1 times [2020-10-28 00:36:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:10,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785259250] [2020-10-28 00:36:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:10,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:11,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:11,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:15,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:15,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:15,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:36:15,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:36:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 00:36:15,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-28 00:36:15,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:36:15,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:16,587 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:16,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:16,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:16,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:36:16,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:16,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:16,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:16,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785259250] [2020-10-28 00:36:16,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:16,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:16,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699484744] [2020-10-28 00:36:16,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:16,657 INFO L87 Difference]: Start difference. First operand 14077 states and 23527 transitions. Second operand 4 states. [2020-10-28 00:36:17,390 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:36:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:20,585 INFO L93 Difference]: Finished difference Result 38203 states and 63787 transitions. [2020-10-28 00:36:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:20,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:36:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:20,647 INFO L225 Difference]: With dead ends: 38203 [2020-10-28 00:36:20,647 INFO L226 Difference]: Without dead ends: 24452 [2020-10-28 00:36:20,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24452 states. [2020-10-28 00:36:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24452 to 24397. [2020-10-28 00:36:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24397 states. [2020-10-28 00:36:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24397 states to 24397 states and 40593 transitions. [2020-10-28 00:36:22,116 INFO L78 Accepts]: Start accepts. Automaton has 24397 states and 40593 transitions. Word has length 128 [2020-10-28 00:36:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:22,117 INFO L481 AbstractCegarLoop]: Abstraction has 24397 states and 40593 transitions. [2020-10-28 00:36:22,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24397 states and 40593 transitions. [2020-10-28 00:36:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:36:22,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:22,119 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] [2020-10-28 00:36:22,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:36:22,119 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1174756090, now seen corresponding path program 1 times [2020-10-28 00:36:22,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:22,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102909667] [2020-10-28 00:36:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:22,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:22,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:22,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:22,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:23,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:27,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:36:27,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:36:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:36:27,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:27,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:27,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-28 00:36:27,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:36:27,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:27,809 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:27,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:27,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:27,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:27,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:36:27,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:27,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:27,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102909667] [2020-10-28 00:36:27,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:27,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767338291] [2020-10-28 00:36:27,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:27,873 INFO L87 Difference]: Start difference. First operand 24397 states and 40593 transitions. Second operand 4 states. [2020-10-28 00:36:28,559 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:36:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:32,816 INFO L93 Difference]: Finished difference Result 66035 states and 109685 transitions. [2020-10-28 00:36:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:32,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:36:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:32,919 INFO L225 Difference]: With dead ends: 66035 [2020-10-28 00:36:32,919 INFO L226 Difference]: Without dead ends: 41894 [2020-10-28 00:36:32,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41894 states. [2020-10-28 00:36:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41894 to 41865. [2020-10-28 00:36:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41865 states. [2020-10-28 00:36:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41865 states to 41865 states and 69238 transitions. [2020-10-28 00:36:35,887 INFO L78 Accepts]: Start accepts. Automaton has 41865 states and 69238 transitions. Word has length 128 [2020-10-28 00:36:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:35,888 INFO L481 AbstractCegarLoop]: Abstraction has 41865 states and 69238 transitions. [2020-10-28 00:36:35,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41865 states and 69238 transitions. [2020-10-28 00:36:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 00:36:35,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:35,889 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] [2020-10-28 00:36:35,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:36:35,889 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -710197743, now seen corresponding path program 1 times [2020-10-28 00:36:35,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:35,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576976180] [2020-10-28 00:36:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:36,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:36,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:36,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:36,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:40,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:40,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 00:36:40,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:36:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:36:40,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:36:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-28 00:36:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 00:36:40,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:41,570 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:41,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:41,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:41,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:41,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:41,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:41,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:36:41,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:41,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:41,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576976180] [2020-10-28 00:36:41,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:41,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:36:41,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730154592] [2020-10-28 00:36:41,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:36:41,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:36:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:36:41,618 INFO L87 Difference]: Start difference. First operand 41865 states and 69238 transitions. Second operand 4 states. [2020-10-28 00:36:42,298 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:36:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:36:48,192 INFO L93 Difference]: Finished difference Result 111919 states and 184570 transitions. [2020-10-28 00:36:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:36:48,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2020-10-28 00:36:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:36:48,289 INFO L225 Difference]: With dead ends: 111919 [2020-10-28 00:36:48,289 INFO L226 Difference]: Without dead ends: 70275 [2020-10-28 00:36:48,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:36:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70275 states. [2020-10-28 00:36:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70275 to 70248. [2020-10-28 00:36:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70248 states. [2020-10-28 00:36:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70248 states to 70248 states and 115199 transitions. [2020-10-28 00:36:52,982 INFO L78 Accepts]: Start accepts. Automaton has 70248 states and 115199 transitions. Word has length 128 [2020-10-28 00:36:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:36:52,983 INFO L481 AbstractCegarLoop]: Abstraction has 70248 states and 115199 transitions. [2020-10-28 00:36:52,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:36:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 70248 states and 115199 transitions. [2020-10-28 00:36:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 00:36:52,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:52,984 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] [2020-10-28 00:36:52,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:36:52,984 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 403228684, now seen corresponding path program 1 times [2020-10-28 00:36:52,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:52,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958591708] [2020-10-28 00:36:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:53,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:54,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:56,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:36:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-28 00:36:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:36:56,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:57,745 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:36:57,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:36:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:36:57,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:36:57,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:36:57,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:36:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:36:57,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958591708] [2020-10-28 00:36:57,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:36:57,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:36:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521090444] [2020-10-28 00:36:57,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:36:57,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:36:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:36:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:36:57,819 INFO L87 Difference]: Start difference. First operand 70248 states and 115199 transitions. Second operand 7 states. [2020-10-28 00:36:58,652 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 00:37:01,598 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:37:02,301 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:37:02,953 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:37:03,961 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:37:04,718 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:37:05,416 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:37:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:15,572 INFO L93 Difference]: Finished difference Result 247296 states and 405903 transitions. [2020-10-28 00:37:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 00:37:15,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 129 [2020-10-28 00:37:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:16,045 INFO L225 Difference]: With dead ends: 247296 [2020-10-28 00:37:16,046 INFO L226 Difference]: Without dead ends: 177245 [2020-10-28 00:37:16,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:37:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177245 states. [2020-10-28 00:37:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177245 to 70248. [2020-10-28 00:37:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70248 states. [2020-10-28 00:37:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70248 states to 70248 states and 114943 transitions. [2020-10-28 00:37:22,066 INFO L78 Accepts]: Start accepts. Automaton has 70248 states and 114943 transitions. Word has length 129 [2020-10-28 00:37:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:22,067 INFO L481 AbstractCegarLoop]: Abstraction has 70248 states and 114943 transitions. [2020-10-28 00:37:22,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:37:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 70248 states and 114943 transitions. [2020-10-28 00:37:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 00:37:22,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:22,068 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] [2020-10-28 00:37:22,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:37:22,069 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -212449610, now seen corresponding path program 1 times [2020-10-28 00:37:22,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:22,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087320609] [2020-10-28 00:37:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:22,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 00:37:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:37:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:24,706 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:37:24,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:24,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:24,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:37:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:24,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087320609] [2020-10-28 00:37:24,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:24,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090467825] [2020-10-28 00:37:24,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:24,771 INFO L87 Difference]: Start difference. First operand 70248 states and 114943 transitions. Second operand 4 states. [2020-10-28 00:37:25,451 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:37:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:33,445 INFO L93 Difference]: Finished difference Result 159058 states and 260174 transitions. [2020-10-28 00:37:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:33,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2020-10-28 00:37:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:33,565 INFO L225 Difference]: With dead ends: 159058 [2020-10-28 00:37:33,565 INFO L226 Difference]: Without dead ends: 89007 [2020-10-28 00:37:33,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89007 states. [2020-10-28 00:37:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89007 to 89004. [2020-10-28 00:37:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89004 states. [2020-10-28 00:37:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89004 states to 89004 states and 145322 transitions. [2020-10-28 00:37:40,097 INFO L78 Accepts]: Start accepts. Automaton has 89004 states and 145322 transitions. Word has length 130 [2020-10-28 00:37:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:40,097 INFO L481 AbstractCegarLoop]: Abstraction has 89004 states and 145322 transitions. [2020-10-28 00:37:40,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 89004 states and 145322 transitions. [2020-10-28 00:37:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 00:37:40,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:40,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:40,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:37:40,099 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1969219359, now seen corresponding path program 1 times [2020-10-28 00:37:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:40,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352670986] [2020-10-28 00:37:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:40,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:45,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:37:45,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:45,784 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:37:45,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:45,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:45,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:45,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352670986] [2020-10-28 00:37:45,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:45,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:45,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63386795] [2020-10-28 00:37:45,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:45,853 INFO L87 Difference]: Start difference. First operand 89004 states and 145322 transitions. Second operand 4 states. [2020-10-28 00:37:46,511 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:37:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:56,010 INFO L93 Difference]: Finished difference Result 201403 states and 328749 transitions. [2020-10-28 00:37:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:56,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-10-28 00:37:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:56,198 INFO L225 Difference]: With dead ends: 201403 [2020-10-28 00:37:56,198 INFO L226 Difference]: Without dead ends: 112661 [2020-10-28 00:37:56,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112661 states. [2020-10-28 00:38:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112661 to 112658. [2020-10-28 00:38:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112658 states. [2020-10-28 00:38:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112658 states to 112658 states and 183565 transitions. [2020-10-28 00:38:04,424 INFO L78 Accepts]: Start accepts. Automaton has 112658 states and 183565 transitions. Word has length 133 [2020-10-28 00:38:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:04,424 INFO L481 AbstractCegarLoop]: Abstraction has 112658 states and 183565 transitions. [2020-10-28 00:38:04,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 112658 states and 183565 transitions. [2020-10-28 00:38:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 00:38:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:04,425 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] [2020-10-28 00:38:04,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:38:04,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash -739296517, now seen corresponding path program 1 times [2020-10-28 00:38:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:04,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631215280] [2020-10-28 00:38:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:05,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:09,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:09,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:38:09,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:10,120 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:38:10,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:10,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:10,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:10,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631215280] [2020-10-28 00:38:10,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:10,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:10,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316612456] [2020-10-28 00:38:10,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:10,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:10,168 INFO L87 Difference]: Start difference. First operand 112658 states and 183565 transitions. Second operand 4 states. [2020-10-28 00:38:10,832 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:38:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:22,118 INFO L93 Difference]: Finished difference Result 255014 states and 415406 transitions. [2020-10-28 00:38:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:22,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-10-28 00:38:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:22,481 INFO L225 Difference]: With dead ends: 255014 [2020-10-28 00:38:22,481 INFO L226 Difference]: Without dead ends: 142596 [2020-10-28 00:38:22,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142596 states.