/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.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:26:07,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:26:07,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:26:07,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:26:07,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:26:07,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:26:07,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:26:07,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:26:07,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:26:07,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:26:07,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:26:07,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:26:07,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:26:07,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:26:07,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:26:07,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:26:07,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:26:07,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:26:07,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:26:07,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:26:07,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:26:07,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:26:07,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:26:07,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:26:07,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:26:07,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:26:07,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:26:07,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:26:07,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:26:07,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:26:07,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:26:07,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:26:07,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:26:07,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:26:07,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:26:07,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:26:07,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:26:07,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:26:07,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:26:07,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:26:07,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:26:07,769 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 00:26:07,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:26:07,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:26:07,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:26:07,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:26:07,800 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:26:07,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:26:07,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:26:07,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:26:07,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:26:07,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:26:07,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:26:07,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:26:07,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:26:07,802 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:26:07,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:26:07,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:26:07,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:26:07,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:26:07,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:26:07,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:26:07,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:26:07,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:26:07,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:26:07,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:26:07,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:26:07,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:26:07,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:26:07,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:26:07,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:26:07,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:26:08,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:26:08,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:26:08,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:26:08,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:26:08,275 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:26:08,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:26:08,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1a5002b/f1fb1e5ff8ea488c986a098527e24f1e/FLAG25cf6559f [2020-10-28 00:26:09,124 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:26:09,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:26:09,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1a5002b/f1fb1e5ff8ea488c986a098527e24f1e/FLAG25cf6559f [2020-10-28 00:26:09,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d1a5002b/f1fb1e5ff8ea488c986a098527e24f1e [2020-10-28 00:26:09,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:26:09,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:26:09,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:09,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:26:09,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:26:09,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ad5b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09, skipping insertion in model container [2020-10-28 00:26:09,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:26:09,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:26:09,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:09,827 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:26:09,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:09,935 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:26:09,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09 WrapperNode [2020-10-28 00:26:09,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:09,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:26:09,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:26:09,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:26:09,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:09,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:10,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (1/1) ... [2020-10-28 00:26:10,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:26:10,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:26:10,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:26:10,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:26:10,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (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 00:26:10,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:26:10,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:26:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:26:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:26:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:26:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:26:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:26:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:26:10,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:26:10,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:26:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:26:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:26:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:26:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:26:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:26:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:26:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:26:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:26:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:26:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:26:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:26:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:26:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:26:11,372 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:26:11,372 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:26:11,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:11 BoogieIcfgContainer [2020-10-28 00:26:11,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:26:11,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:26:11,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:26:11,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:26:11,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:26:09" (1/3) ... [2020-10-28 00:26:11,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f233e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:11, skipping insertion in model container [2020-10-28 00:26:11,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:09" (2/3) ... [2020-10-28 00:26:11,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f233e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:11, skipping insertion in model container [2020-10-28 00:26:11,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:11" (3/3) ... [2020-10-28 00:26:11,391 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:26:11,405 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:26:11,411 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:26:11,427 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:26:11,469 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:26:11,469 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:26:11,469 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:26:11,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:26:11,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:26:11,470 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:26:11,470 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:26:11,470 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:26:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-10-28 00:26:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:26:11,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:11,522 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] [2020-10-28 00:26:11,522 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash 110987728, now seen corresponding path program 1 times [2020-10-28 00:26:11,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:11,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398693257] [2020-10-28 00:26:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:13,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:15,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:15,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:26:15,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:26:15,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3153 [2020-10-28 00:26:15,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:26:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:26:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:26:15,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:26:15,527 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:15,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:15,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:15,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:26:15,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:15,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:15,730 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 00:26:15,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398693257] [2020-10-28 00:26:15,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:15,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:26:15,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009194214] [2020-10-28 00:26:15,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:26:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:26:15,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:15,762 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 6 states. [2020-10-28 00:26:16,175 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:17,495 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:17,893 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:26:18,335 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:18,685 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:18,775 INFO L93 Difference]: Finished difference Result 756 states and 1254 transitions. [2020-10-28 00:26:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:26:18,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:26:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:18,823 INFO L225 Difference]: With dead ends: 756 [2020-10-28 00:26:18,823 INFO L226 Difference]: Without dead ends: 637 [2020-10-28 00:26:18,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:26:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-28 00:26:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 250. [2020-10-28 00:26:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 00:26:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 393 transitions. [2020-10-28 00:26:18,957 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 393 transitions. Word has length 67 [2020-10-28 00:26:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:18,959 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 393 transitions. [2020-10-28 00:26:18,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:26:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 393 transitions. [2020-10-28 00:26:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:26:18,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:18,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:26:18,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:26:18,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1530351084, now seen corresponding path program 1 times [2020-10-28 00:26:18,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:18,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488289127] [2020-10-28 00:26:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:22,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:22,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:26:22,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:22,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3604 [2020-10-28 00:26:22,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:22,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:26:22,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:22,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:26:22,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 00:26:23,074 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:23,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:23,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:23,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:23,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:23,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:23,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:23,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:23,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:23,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:23,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:23,134 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 00:26:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488289127] [2020-10-28 00:26:23,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:23,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:26:23,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282701104] [2020-10-28 00:26:23,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:26:23,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:23,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:26:23,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:26:23,139 INFO L87 Difference]: Start difference. First operand 250 states and 393 transitions. Second operand 7 states. [2020-10-28 00:26:23,542 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:24,845 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:25,205 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:26:25,600 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:26,061 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:26,432 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:27,111 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:27,699 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:27,713 INFO L93 Difference]: Finished difference Result 1594 states and 2604 transitions. [2020-10-28 00:26:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:26:27,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 00:26:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:27,722 INFO L225 Difference]: With dead ends: 1594 [2020-10-28 00:26:27,722 INFO L226 Difference]: Without dead ends: 1405 [2020-10-28 00:26:27,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:26:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2020-10-28 00:26:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 743. [2020-10-28 00:26:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-10-28 00:26:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1206 transitions. [2020-10-28 00:26:27,797 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1206 transitions. Word has length 68 [2020-10-28 00:26:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:27,798 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1206 transitions. [2020-10-28 00:26:27,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:26:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1206 transitions. [2020-10-28 00:26:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:26:27,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:27,800 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] [2020-10-28 00:26:27,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:26:27,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1572726423, now seen corresponding path program 1 times [2020-10-28 00:26:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547587057] [2020-10-28 00:26:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:27,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:28,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:30,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:26:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:30,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2960 [2020-10-28 00:26:30,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:31,148 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:31,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:31,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:31,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:26:31,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:31,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:31,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:31,189 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 00:26:31,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547587057] [2020-10-28 00:26:31,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:31,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:31,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366304839] [2020-10-28 00:26:31,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:31,192 INFO L87 Difference]: Start difference. First operand 743 states and 1206 transitions. Second operand 5 states. [2020-10-28 00:26:31,509 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:32,605 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:26:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:32,740 INFO L93 Difference]: Finished difference Result 2615 states and 4298 transitions. [2020-10-28 00:26:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:32,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 00:26:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:32,756 INFO L225 Difference]: With dead ends: 2615 [2020-10-28 00:26:32,756 INFO L226 Difference]: Without dead ends: 1995 [2020-10-28 00:26:32,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:26:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2020-10-28 00:26:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1365. [2020-10-28 00:26:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2020-10-28 00:26:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2230 transitions. [2020-10-28 00:26:32,880 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2230 transitions. Word has length 69 [2020-10-28 00:26:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:32,882 INFO L481 AbstractCegarLoop]: Abstraction has 1365 states and 2230 transitions. [2020-10-28 00:26:32,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2230 transitions. [2020-10-28 00:26:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:26:32,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:32,889 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] [2020-10-28 00:26:32,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:26:32,889 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:32,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1157417381, now seen corresponding path program 1 times [2020-10-28 00:26:32,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:32,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025241810] [2020-10-28 00:26:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2845 [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:26:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:36,130 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:36,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:36,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:36,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:36,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:36,172 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 00:26:36,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025241810] [2020-10-28 00:26:36,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:36,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:36,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421791454] [2020-10-28 00:26:36,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:36,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:36,174 INFO L87 Difference]: Start difference. First operand 1365 states and 2230 transitions. Second operand 5 states. [2020-10-28 00:26:36,560 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:37,611 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:26:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:37,831 INFO L93 Difference]: Finished difference Result 5055 states and 8314 transitions. [2020-10-28 00:26:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:37,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:26:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:37,856 INFO L225 Difference]: With dead ends: 5055 [2020-10-28 00:26:37,857 INFO L226 Difference]: Without dead ends: 3825 [2020-10-28 00:26:37,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:26:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2020-10-28 00:26:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2578. [2020-10-28 00:26:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2020-10-28 00:26:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 4220 transitions. [2020-10-28 00:26:38,094 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 4220 transitions. Word has length 70 [2020-10-28 00:26:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:38,095 INFO L481 AbstractCegarLoop]: Abstraction has 2578 states and 4220 transitions. [2020-10-28 00:26:38,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 4220 transitions. [2020-10-28 00:26:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:26:38,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:38,097 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] [2020-10-28 00:26:38,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:26:38,097 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 936497941, now seen corresponding path program 1 times [2020-10-28 00:26:38,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:38,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162428993] [2020-10-28 00:26:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:39,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:39,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:26:39,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:39,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-28 00:26:39,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:26:39,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:26:39,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:40,316 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:40,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:40,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:26:40,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162428993] [2020-10-28 00:26:40,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:40,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393480526] [2020-10-28 00:26:40,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:40,373 INFO L87 Difference]: Start difference. First operand 2578 states and 4220 transitions. Second operand 4 states. [2020-10-28 00:26:41,380 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:41,712 INFO L93 Difference]: Finished difference Result 6851 states and 11188 transitions. [2020-10-28 00:26:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:41,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 00:26:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:41,739 INFO L225 Difference]: With dead ends: 6851 [2020-10-28 00:26:41,739 INFO L226 Difference]: Without dead ends: 4408 [2020-10-28 00:26:41,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2020-10-28 00:26:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4348. [2020-10-28 00:26:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4348 states. [2020-10-28 00:26:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 7007 transitions. [2020-10-28 00:26:42,133 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 7007 transitions. Word has length 72 [2020-10-28 00:26:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:42,135 INFO L481 AbstractCegarLoop]: Abstraction has 4348 states and 7007 transitions. [2020-10-28 00:26:42,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 7007 transitions. [2020-10-28 00:26:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:26:42,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:42,137 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] [2020-10-28 00:26:42,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:26:42,138 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash -860329321, now seen corresponding path program 1 times [2020-10-28 00:26:42,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:42,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543883146] [2020-10-28 00:26:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:42,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:43,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:26:43,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-28 00:26:43,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:26:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:26:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:43,721 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:43,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:43,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:43,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:43,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:26:43,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:43,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:43,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:43,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:26:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:26:43,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543883146] [2020-10-28 00:26:43,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:43,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104080099] [2020-10-28 00:26:43,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:43,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:43,781 INFO L87 Difference]: Start difference. First operand 4348 states and 7007 transitions. Second operand 4 states. [2020-10-28 00:26:44,146 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:45,371 INFO L93 Difference]: Finished difference Result 10416 states and 16775 transitions. [2020-10-28 00:26:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:45,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:26:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:45,409 INFO L225 Difference]: With dead ends: 10416 [2020-10-28 00:26:45,410 INFO L226 Difference]: Without dead ends: 6221 [2020-10-28 00:26:45,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6221 states. [2020-10-28 00:26:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6221 to 6190. [2020-10-28 00:26:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6190 states. [2020-10-28 00:26:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6190 states to 6190 states and 9907 transitions. [2020-10-28 00:26:45,963 INFO L78 Accepts]: Start accepts. Automaton has 6190 states and 9907 transitions. Word has length 73 [2020-10-28 00:26:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:45,964 INFO L481 AbstractCegarLoop]: Abstraction has 6190 states and 9907 transitions. [2020-10-28 00:26:45,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6190 states and 9907 transitions. [2020-10-28 00:26:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:26:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:45,972 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] [2020-10-28 00:26:45,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:26:45,972 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1518772228, now seen corresponding path program 1 times [2020-10-28 00:26:45,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:45,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422250359] [2020-10-28 00:26:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:46,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:51,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:26:51,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:26:51,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:26:51,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:26:51,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:26:51,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:51,385 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:51,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:51,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:51,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:26:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:51,428 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 00:26:51,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422250359] [2020-10-28 00:26:51,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:51,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694520217] [2020-10-28 00:26:51,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:51,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:51,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:51,431 INFO L87 Difference]: Start difference. First operand 6190 states and 9907 transitions. Second operand 4 states. [2020-10-28 00:26:51,850 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:53,287 INFO L93 Difference]: Finished difference Result 13277 states and 21285 transitions. [2020-10-28 00:26:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:53,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:26:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:53,334 INFO L225 Difference]: With dead ends: 13277 [2020-10-28 00:26:53,334 INFO L226 Difference]: Without dead ends: 9072 [2020-10-28 00:26:53,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9072 states. [2020-10-28 00:26:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9072 to 9069. [2020-10-28 00:26:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9069 states. [2020-10-28 00:26:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 14429 transitions. [2020-10-28 00:26:54,017 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 14429 transitions. Word has length 73 [2020-10-28 00:26:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:54,017 INFO L481 AbstractCegarLoop]: Abstraction has 9069 states and 14429 transitions. [2020-10-28 00:26:54,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 14429 transitions. [2020-10-28 00:26:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:26:54,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:54,020 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] [2020-10-28 00:26:54,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:26:54,020 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1380751350, now seen corresponding path program 1 times [2020-10-28 00:26:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:54,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834396816] [2020-10-28 00:26:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:56,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2764 [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:26:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:26:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:57,161 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:26:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:57,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:57,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:57,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:26:57,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:57,204 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 00:26:57,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834396816] [2020-10-28 00:26:57,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:57,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:26:57,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126740349] [2020-10-28 00:26:57,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:26:57,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:26:57,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:26:57,206 INFO L87 Difference]: Start difference. First operand 9069 states and 14429 transitions. Second operand 4 states. [2020-10-28 00:26:57,548 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:26:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:58,928 INFO L93 Difference]: Finished difference Result 21893 states and 34757 transitions. [2020-10-28 00:26:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:26:58,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 00:26:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:58,969 INFO L225 Difference]: With dead ends: 21893 [2020-10-28 00:26:58,969 INFO L226 Difference]: Without dead ends: 12978 [2020-10-28 00:26:58,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12978 states. [2020-10-28 00:26:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12978 to 12905. [2020-10-28 00:26:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12905 states. [2020-10-28 00:26:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12905 states to 12905 states and 20341 transitions. [2020-10-28 00:26:59,991 INFO L78 Accepts]: Start accepts. Automaton has 12905 states and 20341 transitions. Word has length 75 [2020-10-28 00:26:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:59,991 INFO L481 AbstractCegarLoop]: Abstraction has 12905 states and 20341 transitions. [2020-10-28 00:26:59,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:26:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12905 states and 20341 transitions. [2020-10-28 00:26:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:26:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:59,994 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] [2020-10-28 00:26:59,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:26:59,994 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash -745702959, now seen corresponding path program 1 times [2020-10-28 00:26:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:59,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128262939] [2020-10-28 00:26:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:00,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:05,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:27:05,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:27:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:27:05,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:05,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:27:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:27:05,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:05,408 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:27:05,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:05,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:05,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:05,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:27:05,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:05,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:05,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:05,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:27:05,455 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 00:27:05,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128262939] [2020-10-28 00:27:05,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:05,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:05,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593058763] [2020-10-28 00:27:05,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:05,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:05,459 INFO L87 Difference]: Start difference. First operand 12905 states and 20341 transitions. Second operand 4 states. [2020-10-28 00:27:05,847 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:27:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:07,474 INFO L93 Difference]: Finished difference Result 27313 states and 43093 transitions. [2020-10-28 00:27:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:07,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 00:27:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:07,526 INFO L225 Difference]: With dead ends: 27313 [2020-10-28 00:27:07,527 INFO L226 Difference]: Without dead ends: 18398 [2020-10-28 00:27:07,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18398 states. [2020-10-28 00:27:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18398 to 18395. [2020-10-28 00:27:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-10-28 00:27:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 28751 transitions. [2020-10-28 00:27:08,661 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 28751 transitions. Word has length 75 [2020-10-28 00:27:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:08,661 INFO L481 AbstractCegarLoop]: Abstraction has 18395 states and 28751 transitions. [2020-10-28 00:27:08,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 28751 transitions. [2020-10-28 00:27:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:27:08,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:08,663 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] [2020-10-28 00:27:08,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:27:08,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1267303531, now seen corresponding path program 1 times [2020-10-28 00:27:08,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:08,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432218955] [2020-10-28 00:27:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:13,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:27:13,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:27:13,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:14,059 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:27:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:14,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:14,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:27:14,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:14,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:14,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:14,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:14,178 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 00:27:14,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432218955] [2020-10-28 00:27:14,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:14,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:14,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526365340] [2020-10-28 00:27:14,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:14,184 INFO L87 Difference]: Start difference. First operand 18395 states and 28751 transitions. Second operand 4 states. [2020-10-28 00:27:14,550 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:27:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:16,365 INFO L93 Difference]: Finished difference Result 40937 states and 64147 transitions. [2020-10-28 00:27:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:16,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 00:27:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:16,433 INFO L225 Difference]: With dead ends: 40937 [2020-10-28 00:27:16,433 INFO L226 Difference]: Without dead ends: 22620 [2020-10-28 00:27:16,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2020-10-28 00:27:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 22544. [2020-10-28 00:27:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22544 states. [2020-10-28 00:27:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22544 states to 22544 states and 35084 transitions. [2020-10-28 00:27:17,872 INFO L78 Accepts]: Start accepts. Automaton has 22544 states and 35084 transitions. Word has length 77 [2020-10-28 00:27:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:17,873 INFO L481 AbstractCegarLoop]: Abstraction has 22544 states and 35084 transitions. [2020-10-28 00:27:17,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22544 states and 35084 transitions. [2020-10-28 00:27:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:27:17,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:17,874 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] [2020-10-28 00:27:17,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:27:17,874 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1651662750, now seen corresponding path program 1 times [2020-10-28 00:27:17,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:17,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644807183] [2020-10-28 00:27:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:17,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:18,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:18,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:19,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:22,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:22,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:27:22,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:27:22,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:27:22,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 00:27:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:27:22,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:23,267 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:27:23,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:23,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:23,304 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 00:27:23,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644807183] [2020-10-28 00:27:23,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:23,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721521378] [2020-10-28 00:27:23,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:23,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:23,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:23,307 INFO L87 Difference]: Start difference. First operand 22544 states and 35084 transitions. Second operand 4 states. [2020-10-28 00:27:23,659 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:27:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:25,879 INFO L93 Difference]: Finished difference Result 48395 states and 75468 transitions. [2020-10-28 00:27:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:25,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 00:27:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:25,939 INFO L225 Difference]: With dead ends: 48395 [2020-10-28 00:27:25,939 INFO L226 Difference]: Without dead ends: 30096 [2020-10-28 00:27:25,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30096 states. [2020-10-28 00:27:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30096 to 30093. [2020-10-28 00:27:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30093 states. [2020-10-28 00:27:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30093 states to 30093 states and 46572 transitions. [2020-10-28 00:27:27,651 INFO L78 Accepts]: Start accepts. Automaton has 30093 states and 46572 transitions. Word has length 77 [2020-10-28 00:27:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:27,652 INFO L481 AbstractCegarLoop]: Abstraction has 30093 states and 46572 transitions. [2020-10-28 00:27:27,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30093 states and 46572 transitions. [2020-10-28 00:27:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 00:27:27,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:27,653 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] [2020-10-28 00:27:27,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:27:27,653 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2051497384, now seen corresponding path program 1 times [2020-10-28 00:27:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987341033] [2020-10-28 00:27:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:27,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:28,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:32,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 00:27:32,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:27:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:33,235 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:27:33,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:33,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:33,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:33,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:33,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:33,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:33,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:33,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:33,283 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 00:27:33,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987341033] [2020-10-28 00:27:33,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:33,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:27:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934149670] [2020-10-28 00:27:33,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:27:33,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:27:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:33,285 INFO L87 Difference]: Start difference. First operand 30093 states and 46572 transitions. Second operand 6 states. [2020-10-28 00:27:33,721 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:34,968 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:35,350 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:35,893 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:36,292 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:27:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:38,847 INFO L93 Difference]: Finished difference Result 86252 states and 133686 transitions. [2020-10-28 00:27:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:27:38,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 00:27:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:38,949 INFO L225 Difference]: With dead ends: 86252 [2020-10-28 00:27:38,950 INFO L226 Difference]: Without dead ends: 56254 [2020-10-28 00:27:38,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:27:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56254 states. [2020-10-28 00:27:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56254 to 30093. [2020-10-28 00:27:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30093 states. [2020-10-28 00:27:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30093 states to 30093 states and 46431 transitions. [2020-10-28 00:27:41,479 INFO L78 Accepts]: Start accepts. Automaton has 30093 states and 46431 transitions. Word has length 78 [2020-10-28 00:27:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:41,479 INFO L481 AbstractCegarLoop]: Abstraction has 30093 states and 46431 transitions. [2020-10-28 00:27:41,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:27:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 30093 states and 46431 transitions. [2020-10-28 00:27:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:27:41,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:41,480 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] [2020-10-28 00:27:41,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:27:41,481 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1774140821, now seen corresponding path program 1 times [2020-10-28 00:27:41,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:41,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173455125] [2020-10-28 00:27:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:41,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:42,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:46,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:46,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:27:46,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:46,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:27:46,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:27:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 00:27:46,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:27:46,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,052 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:27:47,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:47,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:47,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:47,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:47,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:47,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:47,090 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 00:27:47,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173455125] [2020-10-28 00:27:47,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:47,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:27:47,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56676444] [2020-10-28 00:27:47,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:27:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:27:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:47,093 INFO L87 Difference]: Start difference. First operand 30093 states and 46431 transitions. Second operand 6 states. [2020-10-28 00:27:47,528 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:27:48,732 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:49,153 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:49,705 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:27:50,072 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:55,634 INFO L93 Difference]: Finished difference Result 134464 states and 208038 transitions. [2020-10-28 00:27:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:27:55,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:27:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:55,819 INFO L225 Difference]: With dead ends: 134464 [2020-10-28 00:27:55,819 INFO L226 Difference]: Without dead ends: 104466 [2020-10-28 00:27:55,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:27:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104466 states. [2020-10-28 00:28:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104466 to 56112. [2020-10-28 00:28:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56112 states. [2020-10-28 00:28:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56112 states to 56112 states and 86280 transitions. [2020-10-28 00:28:00,603 INFO L78 Accepts]: Start accepts. Automaton has 56112 states and 86280 transitions. Word has length 81 [2020-10-28 00:28:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:00,603 INFO L481 AbstractCegarLoop]: Abstraction has 56112 states and 86280 transitions. [2020-10-28 00:28:00,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 56112 states and 86280 transitions. [2020-10-28 00:28:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:28:00,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:00,604 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] [2020-10-28 00:28:00,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:28:00,604 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash -895741797, now seen corresponding path program 1 times [2020-10-28 00:28:00,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:00,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695662393] [2020-10-28 00:28:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:00,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:05,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:05,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:28:05,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:28:05,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:28:05,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:28:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:28:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:06,022 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:28:06,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:06,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:06,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:06,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:06,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:06,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:06,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:06,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:06,051 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 00:28:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695662393] [2020-10-28 00:28:06,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:06,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:06,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028622510] [2020-10-28 00:28:06,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:06,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:06,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:06,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:06,053 INFO L87 Difference]: Start difference. First operand 56112 states and 86280 transitions. Second operand 5 states. [2020-10-28 00:28:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:11,956 INFO L93 Difference]: Finished difference Result 79450 states and 121113 transitions. [2020-10-28 00:28:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:28:11,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:28:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:12,079 INFO L225 Difference]: With dead ends: 79450 [2020-10-28 00:28:12,079 INFO L226 Difference]: Without dead ends: 79447 [2020-10-28 00:28:12,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79447 states. [2020-10-28 00:28:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79447 to 56604. [2020-10-28 00:28:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56604 states. [2020-10-28 00:28:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56604 states to 56604 states and 86727 transitions. [2020-10-28 00:28:16,618 INFO L78 Accepts]: Start accepts. Automaton has 56604 states and 86727 transitions. Word has length 82 [2020-10-28 00:28:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:16,619 INFO L481 AbstractCegarLoop]: Abstraction has 56604 states and 86727 transitions. [2020-10-28 00:28:16,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56604 states and 86727 transitions. [2020-10-28 00:28:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:28:16,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:16,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:16,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:28:16,623 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1485359621, now seen corresponding path program 1 times [2020-10-28 00:28:16,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:16,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203963913] [2020-10-28 00:28:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:21,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:28:21,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:22,021 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:28:22,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:22,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:22,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:22,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203963913] [2020-10-28 00:28:22,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:22,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:22,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140351352] [2020-10-28 00:28:22,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:22,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:22,075 INFO L87 Difference]: Start difference. First operand 56604 states and 86727 transitions. Second operand 4 states. [2020-10-28 00:28:23,706 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:26,525 INFO L93 Difference]: Finished difference Result 101811 states and 156210 transitions. [2020-10-28 00:28:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:26,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:28:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:26,595 INFO L225 Difference]: With dead ends: 101811 [2020-10-28 00:28:26,596 INFO L226 Difference]: Without dead ends: 45302 [2020-10-28 00:28:26,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45302 states. [2020-10-28 00:28:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45302 to 45299. [2020-10-28 00:28:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45299 states. [2020-10-28 00:28:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 69157 transitions. [2020-10-28 00:28:30,272 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 69157 transitions. Word has length 108 [2020-10-28 00:28:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:30,272 INFO L481 AbstractCegarLoop]: Abstraction has 45299 states and 69157 transitions. [2020-10-28 00:28:30,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 69157 transitions. [2020-10-28 00:28:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:28:30,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:30,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:30,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:28:30,275 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1606299543, now seen corresponding path program 1 times [2020-10-28 00:28:30,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:30,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433072132] [2020-10-28 00:28:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:30,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:35,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:35,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:28:35,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:28:35,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:28:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 00:28:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:35,691 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:28:35,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:35,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:35,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433072132] [2020-10-28 00:28:35,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:35,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351623960] [2020-10-28 00:28:35,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:35,731 INFO L87 Difference]: Start difference. First operand 45299 states and 69157 transitions. Second operand 4 states. [2020-10-28 00:28:37,196 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:38,320 INFO L93 Difference]: Finished difference Result 63371 states and 96836 transitions. [2020-10-28 00:28:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:38,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:28:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:38,350 INFO L225 Difference]: With dead ends: 63371 [2020-10-28 00:28:38,350 INFO L226 Difference]: Without dead ends: 18234 [2020-10-28 00:28:38,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2020-10-28 00:28:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 18231. [2020-10-28 00:28:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18231 states. [2020-10-28 00:28:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18231 states to 18231 states and 27703 transitions. [2020-10-28 00:28:39,760 INFO L78 Accepts]: Start accepts. Automaton has 18231 states and 27703 transitions. Word has length 108 [2020-10-28 00:28:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:39,760 INFO L481 AbstractCegarLoop]: Abstraction has 18231 states and 27703 transitions. [2020-10-28 00:28:39,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18231 states and 27703 transitions. [2020-10-28 00:28:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 00:28:39,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:39,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:39,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:28:39,762 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1873536655, now seen corresponding path program 1 times [2020-10-28 00:28:39,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:39,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537502019] [2020-10-28 00:28:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:39,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:39,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:40,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:44,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:28:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:45,170 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:28:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:45,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:45,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:45,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:45,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537502019] [2020-10-28 00:28:45,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:45,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699100771] [2020-10-28 00:28:45,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:45,206 INFO L87 Difference]: Start difference. First operand 18231 states and 27703 transitions. Second operand 4 states. [2020-10-28 00:28:46,523 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:46,929 INFO L93 Difference]: Finished difference Result 26045 states and 39639 transitions. [2020-10-28 00:28:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:46,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-28 00:28:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:46,940 INFO L225 Difference]: With dead ends: 26045 [2020-10-28 00:28:46,940 INFO L226 Difference]: Without dead ends: 8019 [2020-10-28 00:28:46,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2020-10-28 00:28:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 7812. [2020-10-28 00:28:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7812 states. [2020-10-28 00:28:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 11847 transitions. [2020-10-28 00:28:47,632 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 11847 transitions. Word has length 111 [2020-10-28 00:28:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:47,632 INFO L481 AbstractCegarLoop]: Abstraction has 7812 states and 11847 transitions. [2020-10-28 00:28:47,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 11847 transitions. [2020-10-28 00:28:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 00:28:47,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:47,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:47,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:28:47,634 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 288334957, now seen corresponding path program 1 times [2020-10-28 00:28:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:47,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810633861] [2020-10-28 00:28:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:47,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:52,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:52,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 00:28:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:53,047 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:28:53,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:53,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:53,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:53,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:28:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:28:53,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810633861] [2020-10-28 00:28:53,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:28:53,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:28:53,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299613288] [2020-10-28 00:28:53,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:28:53,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:28:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:53,088 INFO L87 Difference]: Start difference. First operand 7812 states and 11847 transitions. Second operand 6 states. [2020-10-28 00:28:53,500 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:28:54,682 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:28:55,061 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:55,424 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:28:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:57,032 INFO L93 Difference]: Finished difference Result 24367 states and 37135 transitions. [2020-10-28 00:28:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:28:57,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 00:28:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:57,061 INFO L225 Difference]: With dead ends: 24367 [2020-10-28 00:28:57,061 INFO L226 Difference]: Without dead ends: 16760 [2020-10-28 00:28:57,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:28:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16760 states. [2020-10-28 00:28:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16760 to 14295. [2020-10-28 00:28:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14295 states. [2020-10-28 00:28:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14295 states to 14295 states and 21648 transitions. [2020-10-28 00:28:58,328 INFO L78 Accepts]: Start accepts. Automaton has 14295 states and 21648 transitions. Word has length 114 [2020-10-28 00:28:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:58,329 INFO L481 AbstractCegarLoop]: Abstraction has 14295 states and 21648 transitions. [2020-10-28 00:28:58,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 14295 states and 21648 transitions. [2020-10-28 00:28:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 00:28:58,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:58,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:58,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:28:58,330 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1890872835, now seen corresponding path program 1 times [2020-10-28 00:28:58,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:58,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644538580] [2020-10-28 00:28:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:03,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 00:29:03,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:03,728 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:29:03,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:03,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:03,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644538580] [2020-10-28 00:29:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:29:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:29:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210272180] [2020-10-28 00:29:03,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:29:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:29:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:03,765 INFO L87 Difference]: Start difference. First operand 14295 states and 21648 transitions. Second operand 6 states. [2020-10-28 00:29:04,161 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:29:05,290 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:29:05,690 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:29:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:07,472 INFO L93 Difference]: Finished difference Result 24625 states and 37361 transitions. [2020-10-28 00:29:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:29:07,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 00:29:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:07,497 INFO L225 Difference]: With dead ends: 24625 [2020-10-28 00:29:07,497 INFO L226 Difference]: Without dead ends: 19735 [2020-10-28 00:29:07,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:29:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19735 states. [2020-10-28 00:29:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19735 to 19410. [2020-10-28 00:29:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19410 states. [2020-10-28 00:29:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19410 states to 19410 states and 29419 transitions. [2020-10-28 00:29:09,192 INFO L78 Accepts]: Start accepts. Automaton has 19410 states and 29419 transitions. Word has length 114 [2020-10-28 00:29:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:09,192 INFO L481 AbstractCegarLoop]: Abstraction has 19410 states and 29419 transitions. [2020-10-28 00:29:09,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:29:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19410 states and 29419 transitions. [2020-10-28 00:29:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 00:29:09,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:09,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:09,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:29:09,194 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1046566303, now seen corresponding path program 1 times [2020-10-28 00:29:09,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:09,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410727481] [2020-10-28 00:29:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:09,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:11,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:14,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 00:29:14,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:14,570 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:29:14,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:14,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:14,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:14,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410727481] [2020-10-28 00:29:14,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:29:14,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:29:14,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282749779] [2020-10-28 00:29:14,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:29:14,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:14,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:29:14,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:14,610 INFO L87 Difference]: Start difference. First operand 19410 states and 29419 transitions. Second operand 6 states. [2020-10-28 00:29:14,983 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:29:16,041 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 00:29:16,383 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:29:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:18,433 INFO L93 Difference]: Finished difference Result 29016 states and 44053 transitions. [2020-10-28 00:29:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:29:18,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 00:29:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:18,464 INFO L225 Difference]: With dead ends: 29016 [2020-10-28 00:29:18,464 INFO L226 Difference]: Without dead ends: 22683 [2020-10-28 00:29:18,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:29:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2020-10-28 00:29:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 22340. [2020-10-28 00:29:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22340 states. [2020-10-28 00:29:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22340 states to 22340 states and 33891 transitions. [2020-10-28 00:29:20,230 INFO L78 Accepts]: Start accepts. Automaton has 22340 states and 33891 transitions. Word has length 114 [2020-10-28 00:29:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:20,230 INFO L481 AbstractCegarLoop]: Abstraction has 22340 states and 33891 transitions. [2020-10-28 00:29:20,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:29:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 22340 states and 33891 transitions. [2020-10-28 00:29:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 00:29:20,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:20,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:20,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:29:20,232 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -456503474, now seen corresponding path program 1 times [2020-10-28 00:29:20,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:20,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406590242] [2020-10-28 00:29:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:20,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:25,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:29:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:25,587 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:29:25,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:25,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:25,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:25,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:25,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:29:25,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:25,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:25,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:29:25,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406590242] [2020-10-28 00:29:25,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:25,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:29:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370700110] [2020-10-28 00:29:25,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:29:25,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:29:25,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:29:25,639 INFO L87 Difference]: Start difference. First operand 22340 states and 33891 transitions. Second operand 4 states. [2020-10-28 00:29:25,974 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-28 00:29:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:29,948 INFO L93 Difference]: Finished difference Result 64171 states and 97358 transitions. [2020-10-28 00:29:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:29:29,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-28 00:29:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:30,012 INFO L225 Difference]: With dead ends: 64171 [2020-10-28 00:29:30,012 INFO L226 Difference]: Without dead ends: 42012 [2020-10-28 00:29:30,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42012 states. [2020-10-28 00:29:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42012 to 41925. [2020-10-28 00:29:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41925 states. [2020-10-28 00:29:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41925 states to 41925 states and 63509 transitions. [2020-10-28 00:29:33,954 INFO L78 Accepts]: Start accepts. Automaton has 41925 states and 63509 transitions. Word has length 115 [2020-10-28 00:29:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:33,954 INFO L481 AbstractCegarLoop]: Abstraction has 41925 states and 63509 transitions. [2020-10-28 00:29:33,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41925 states and 63509 transitions. [2020-10-28 00:29:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 00:29:33,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:33,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:33,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:29:33,956 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 928385504, now seen corresponding path program 1 times [2020-10-28 00:29:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:33,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830385159] [2020-10-28 00:29:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:34,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:36,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:38,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:38,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 00:29:38,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:38,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:29:38,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:29:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:29:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:29:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:39,412 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 00:29:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:39,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:39,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:39,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:29:39,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 00:29:39,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830385159] [2020-10-28 00:29:39,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:39,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:29:39,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660911813] [2020-10-28 00:29:39,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:29:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:29:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:29:39,454 INFO L87 Difference]: Start difference. First operand 41925 states and 63509 transitions. Second operand 5 states. [2020-10-28 00:29:40,922 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 199