/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:48:45,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:48:45,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:48:45,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:48:45,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:48:45,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:48:45,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:48:45,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:48:45,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:48:45,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:48:45,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:48:45,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:48:45,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:48:45,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:48:45,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:48:45,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:48:45,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:48:45,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:48:45,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:48:45,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:48:45,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:48:45,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:48:45,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:48:45,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:48:45,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:48:45,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:48:45,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:48:45,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:48:45,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:48:45,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:48:45,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:48:45,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:48:45,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:48:45,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:48:45,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:48:45,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:48:45,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:48:45,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:48:45,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:48:45,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:48:45,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:48:45,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:48:45,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:48:45,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:48:45,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:48:45,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:48:45,758 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:48:45,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:48:45,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:48:45,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:48:45,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:48:45,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:48:45,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:48:45,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:48:45,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:48:45,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:48:45,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:48:45,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:48:45,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:48:45,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:48:45,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:48:45,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:48:45,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:48:45,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:48:45,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:48:45,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:48:45,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:48:45,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:48:45,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:48:45,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:48:45,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:48:45,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:48:46,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:48:46,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:48:46,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:48:46,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:48:46,256 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:48:46,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:48:46,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157e706fa/41a68fb2a3f049fb91d8c01ecc008288/FLAGff6fc1bd6 [2020-10-27 23:48:46,929 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:48:46,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:48:46,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157e706fa/41a68fb2a3f049fb91d8c01ecc008288/FLAGff6fc1bd6 [2020-10-27 23:48:47,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157e706fa/41a68fb2a3f049fb91d8c01ecc008288 [2020-10-27 23:48:47,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:48:47,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:48:47,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:48:47,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:48:47,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:48:47,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31371569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47, skipping insertion in model container [2020-10-27 23:48:47,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:48:47,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:48:47,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:48:47,605 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:48:47,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:48:47,749 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:48:47,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47 WrapperNode [2020-10-27 23:48:47,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:48:47,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:48:47,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:48:47,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:48:47,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... [2020-10-27 23:48:47,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:48:47,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:48:47,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:48:47,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:48:47,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:48:47,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:48:47,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:48:47,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:48:47,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:48:47,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:48:47,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:48:47,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:48:47,983 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:48:47,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:48:47,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:48:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:48:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:48:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:48:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:48:47,984 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:48:47,985 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:48:47,985 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:48:47,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:48:47,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:48:48,835 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:48:48,835 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:48:48,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:48:48 BoogieIcfgContainer [2020-10-27 23:48:48,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:48:48,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:48:48,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:48:48,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:48:48,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:48:47" (1/3) ... [2020-10-27 23:48:48,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f939711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:48:48, skipping insertion in model container [2020-10-27 23:48:48,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:48:47" (2/3) ... [2020-10-27 23:48:48,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f939711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:48:48, skipping insertion in model container [2020-10-27 23:48:48,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:48:48" (3/3) ... [2020-10-27 23:48:48,847 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:48:48,859 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:48:48,864 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:48:48,876 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:48:48,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:48:48,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:48:48,903 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:48:48,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:48:48,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:48:48,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:48:48,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:48:48,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:48:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-27 23:48:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:48:48,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:48,933 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] [2020-10-27 23:48:48,934 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash 453713683, now seen corresponding path program 1 times [2020-10-27 23:48:48,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:48,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394235137] [2020-10-27 23:48:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:50,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:50,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:54,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:54,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:48:54,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:48:54,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4912 [2020-10-27 23:48:54,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:48:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 23:48:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:48:54,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:48:54,568 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:48:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:54,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:54,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 23:48:54,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:54,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:48:54,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394235137] [2020-10-27 23:48:54,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:54,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:48:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412416205] [2020-10-27 23:48:54,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:48:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:48:54,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:48:54,702 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2020-10-27 23:48:55,101 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:48:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:55,772 INFO L93 Difference]: Finished difference Result 234 states and 371 transitions. [2020-10-27 23:48:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:48:55,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 23:48:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:55,798 INFO L225 Difference]: With dead ends: 234 [2020-10-27 23:48:55,798 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 23:48:55,806 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 [2020-10-27 23:48:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 23:48:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-27 23:48:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 23:48:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 220 transitions. [2020-10-27 23:48:55,885 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 220 transitions. Word has length 65 [2020-10-27 23:48:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:55,886 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 220 transitions. [2020-10-27 23:48:55,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:48:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 220 transitions. [2020-10-27 23:48:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:48:55,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:55,889 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] [2020-10-27 23:48:55,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:48:55,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1306274435, now seen corresponding path program 1 times [2020-10-27 23:48:55,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:55,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137196469] [2020-10-27 23:48:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:55,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:56,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:00,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:00,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:49:00,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:49:00,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:49:00,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:49:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:49:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:49:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 23:49:01,272 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:01,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:01,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:01,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:01,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137196469] [2020-10-27 23:49:01,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:01,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:49:01,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090565105] [2020-10-27 23:49:01,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:49:01,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:49:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:49:01,324 INFO L87 Difference]: Start difference. First operand 153 states and 220 transitions. Second operand 4 states. [2020-10-27 23:49:01,645 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:02,103 INFO L93 Difference]: Finished difference Result 367 states and 558 transitions. [2020-10-27 23:49:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:02,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:49:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:02,107 INFO L225 Difference]: With dead ends: 367 [2020-10-27 23:49:02,107 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 23:49:02,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 23:49:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2020-10-27 23:49:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 23:49:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 372 transitions. [2020-10-27 23:49:02,149 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 372 transitions. Word has length 66 [2020-10-27 23:49:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:02,154 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 372 transitions. [2020-10-27 23:49:02,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:49:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 372 transitions. [2020-10-27 23:49:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:49:02,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:02,158 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] [2020-10-27 23:49:02,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:49:02,158 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1876239457, now seen corresponding path program 1 times [2020-10-27 23:49:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:02,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117229199] [2020-10-27 23:49:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:02,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:02,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:05,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:05,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:49:05,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:49:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3063 [2020-10-27 23:49:05,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:49:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:49:05,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:49:05,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:05,663 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:05,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:05,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:05,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:05,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:05,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:49:05,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:05,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:05,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:05,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117229199] [2020-10-27 23:49:05,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:05,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:49:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392975143] [2020-10-27 23:49:05,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:49:05,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:49:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:49:05,712 INFO L87 Difference]: Start difference. First operand 249 states and 372 transitions. Second operand 4 states. [2020-10-27 23:49:06,002 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:06,542 INFO L93 Difference]: Finished difference Result 639 states and 988 transitions. [2020-10-27 23:49:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:06,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 23:49:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:06,546 INFO L225 Difference]: With dead ends: 639 [2020-10-27 23:49:06,546 INFO L226 Difference]: Without dead ends: 428 [2020-10-27 23:49:06,554 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 [2020-10-27 23:49:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-27 23:49:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 425. [2020-10-27 23:49:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-27 23:49:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 648 transitions. [2020-10-27 23:49:06,635 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 648 transitions. Word has length 67 [2020-10-27 23:49:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:06,635 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 648 transitions. [2020-10-27 23:49:06,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:49:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 648 transitions. [2020-10-27 23:49:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:49:06,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:06,637 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] [2020-10-27 23:49:06,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:49:06,638 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 645910383, now seen corresponding path program 1 times [2020-10-27 23:49:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:06,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271364376] [2020-10-27 23:49:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:06,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:06,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:06,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:11,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:49:11,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:49:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:49:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:11,937 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:11,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:11,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:11,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:11,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:11,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:49:11,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:11,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:11,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271364376] [2020-10-27 23:49:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:49:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309980131] [2020-10-27 23:49:11,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:49:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:49:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:49:11,985 INFO L87 Difference]: Start difference. First operand 425 states and 648 transitions. Second operand 7 states. [2020-10-27 23:49:12,307 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:12,906 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:13,169 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:13,739 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:49:13,969 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:49:14,442 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:14,678 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:15,164 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:15,250 INFO L93 Difference]: Finished difference Result 3509 states and 5504 transitions. [2020-10-27 23:49:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:49:15,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-27 23:49:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:15,270 INFO L225 Difference]: With dead ends: 3509 [2020-10-27 23:49:15,271 INFO L226 Difference]: Without dead ends: 3122 [2020-10-27 23:49:15,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:49:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-10-27 23:49:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1185. [2020-10-27 23:49:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-10-27 23:49:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1844 transitions. [2020-10-27 23:49:15,377 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1844 transitions. Word has length 68 [2020-10-27 23:49:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1844 transitions. [2020-10-27 23:49:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:49:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1844 transitions. [2020-10-27 23:49:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:49:15,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:15,380 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] [2020-10-27 23:49:15,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:49:15,381 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1481112874, now seen corresponding path program 1 times [2020-10-27 23:49:15,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:15,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176834431] [2020-10-27 23:49:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:15,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:17,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:49:17,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:49:17,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-27 23:49:17,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:49:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:49:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:49:17,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:49:17,337 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:17,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:17,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:17,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:17,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176834431] [2020-10-27 23:49:17,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:17,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:49:17,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806264900] [2020-10-27 23:49:17,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:49:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:49:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:49:17,399 INFO L87 Difference]: Start difference. First operand 1185 states and 1844 transitions. Second operand 4 states. [2020-10-27 23:49:17,650 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:18,260 INFO L93 Difference]: Finished difference Result 3287 states and 5144 transitions. [2020-10-27 23:49:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:49:18,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 23:49:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:18,274 INFO L225 Difference]: With dead ends: 3287 [2020-10-27 23:49:18,275 INFO L226 Difference]: Without dead ends: 2140 [2020-10-27 23:49:18,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-10-27 23:49:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2137. [2020-10-27 23:49:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2020-10-27 23:49:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3312 transitions. [2020-10-27 23:49:18,424 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3312 transitions. Word has length 68 [2020-10-27 23:49:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:18,426 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 3312 transitions. [2020-10-27 23:49:18,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:49:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3312 transitions. [2020-10-27 23:49:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:49:18,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:18,435 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] [2020-10-27 23:49:18,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:49:18,435 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -728000039, now seen corresponding path program 1 times [2020-10-27 23:49:18,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:18,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381370800] [2020-10-27 23:49:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:18,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:18,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:21,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:21,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:49:21,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:49:21,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3362 [2020-10-27 23:49:21,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:49:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:49:21,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:49:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:22,163 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:22,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:22,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:22,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:22,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:22,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:22,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381370800] [2020-10-27 23:49:22,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:22,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:49:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818428260] [2020-10-27 23:49:22,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:49:22,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:49:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:49:22,216 INFO L87 Difference]: Start difference. First operand 2137 states and 3312 transitions. Second operand 7 states. [2020-10-27 23:49:22,506 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:23,078 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:23,345 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:23,972 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:49:24,210 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:49:24,954 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:25,210 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:25,822 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:25,927 INFO L93 Difference]: Finished difference Result 14726 states and 22911 transitions. [2020-10-27 23:49:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:49:25,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-27 23:49:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:25,994 INFO L225 Difference]: With dead ends: 14726 [2020-10-27 23:49:25,994 INFO L226 Difference]: Without dead ends: 13323 [2020-10-27 23:49:26,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:49:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13323 states. [2020-10-27 23:49:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13323 to 4230. [2020-10-27 23:49:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4230 states. [2020-10-27 23:49:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 6543 transitions. [2020-10-27 23:49:26,382 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 6543 transitions. Word has length 69 [2020-10-27 23:49:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:26,383 INFO L481 AbstractCegarLoop]: Abstraction has 4230 states and 6543 transitions. [2020-10-27 23:49:26,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:49:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 6543 transitions. [2020-10-27 23:49:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:49:26,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:26,386 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] [2020-10-27 23:49:26,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:49:26,386 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash 823520281, now seen corresponding path program 1 times [2020-10-27 23:49:26,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:26,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036082618] [2020-10-27 23:49:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:26,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:26,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:29,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:29,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:49:29,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:49:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-10-27 23:49:29,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:49:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:49:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 23:49:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:49:29,458 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:29,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:29,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:29,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:29,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:29,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:29,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:49:29,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:29,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:29,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036082618] [2020-10-27 23:49:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:49:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596823220] [2020-10-27 23:49:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:49:29,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:49:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:49:29,515 INFO L87 Difference]: Start difference. First operand 4230 states and 6543 transitions. Second operand 7 states. [2020-10-27 23:49:29,791 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:30,385 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:30,646 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:31,238 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 23:49:31,471 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:49:32,069 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:32,342 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:32,892 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:49:33,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:33,003 INFO L93 Difference]: Finished difference Result 16873 states and 26092 transitions. [2020-10-27 23:49:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:49:33,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-27 23:49:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:33,059 INFO L225 Difference]: With dead ends: 16873 [2020-10-27 23:49:33,060 INFO L226 Difference]: Without dead ends: 14086 [2020-10-27 23:49:33,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:49:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14086 states. [2020-10-27 23:49:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14086 to 5614. [2020-10-27 23:49:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5614 states. [2020-10-27 23:49:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5614 states to 5614 states and 8695 transitions. [2020-10-27 23:49:33,571 INFO L78 Accepts]: Start accepts. Automaton has 5614 states and 8695 transitions. Word has length 69 [2020-10-27 23:49:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:33,571 INFO L481 AbstractCegarLoop]: Abstraction has 5614 states and 8695 transitions. [2020-10-27 23:49:33,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:49:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5614 states and 8695 transitions. [2020-10-27 23:49:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:49:33,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:33,572 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] [2020-10-27 23:49:33,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:49:33,573 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1658722772, now seen corresponding path program 1 times [2020-10-27 23:49:33,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:33,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644320190] [2020-10-27 23:49:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:33,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:34,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:34,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:49:34,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:49:34,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-27 23:49:34,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:49:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:49:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:49:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:34,593 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:34,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:34,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:34,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:34,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:34,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:49:34,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:34,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:34,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:34,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:34,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644320190] [2020-10-27 23:49:34,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:34,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:49:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459164486] [2020-10-27 23:49:34,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:49:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:49:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:49:34,636 INFO L87 Difference]: Start difference. First operand 5614 states and 8695 transitions. Second operand 8 states. [2020-10-27 23:49:34,951 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:49:35,604 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:36,589 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:36,873 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:49:37,130 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:37,375 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:49:37,789 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:49:38,053 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:38,311 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:49:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:40,419 INFO L93 Difference]: Finished difference Result 61174 states and 94968 transitions. [2020-10-27 23:49:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:49:40,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-27 23:49:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:40,592 INFO L225 Difference]: With dead ends: 61174 [2020-10-27 23:49:40,593 INFO L226 Difference]: Without dead ends: 55619 [2020-10-27 23:49:40,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:49:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55619 states. [2020-10-27 23:49:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55619 to 11176. [2020-10-27 23:49:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11176 states. [2020-10-27 23:49:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11176 states to 11176 states and 17076 transitions. [2020-10-27 23:49:42,032 INFO L78 Accepts]: Start accepts. Automaton has 11176 states and 17076 transitions. Word has length 69 [2020-10-27 23:49:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:42,033 INFO L481 AbstractCegarLoop]: Abstraction has 11176 states and 17076 transitions. [2020-10-27 23:49:42,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:49:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11176 states and 17076 transitions. [2020-10-27 23:49:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:49:42,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:42,034 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] [2020-10-27 23:49:42,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:49:42,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1325164071, now seen corresponding path program 1 times [2020-10-27 23:49:42,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:42,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110558016] [2020-10-27 23:49:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:42,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:42,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:42,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:49:42,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:49:42,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-27 23:49:42,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:42,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:49:42,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 23:49:42,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:49:42,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:43,202 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:43,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:43,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:43,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:43,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:49:43,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:43,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:43,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:43,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110558016] [2020-10-27 23:49:43,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:43,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:49:43,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873409842] [2020-10-27 23:49:43,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:49:43,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:49:43,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:49:43,263 INFO L87 Difference]: Start difference. First operand 11176 states and 17076 transitions. Second operand 5 states. [2020-10-27 23:49:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:45,516 INFO L93 Difference]: Finished difference Result 22795 states and 34582 transitions. [2020-10-27 23:49:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:49:45,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-27 23:49:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:45,572 INFO L225 Difference]: With dead ends: 22795 [2020-10-27 23:49:45,572 INFO L226 Difference]: Without dead ends: 22792 [2020-10-27 23:49:45,580 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 [2020-10-27 23:49:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22792 states. [2020-10-27 23:49:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22792 to 11688. [2020-10-27 23:49:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11688 states. [2020-10-27 23:49:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 17588 transitions. [2020-10-27 23:49:47,099 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 17588 transitions. Word has length 71 [2020-10-27 23:49:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:47,100 INFO L481 AbstractCegarLoop]: Abstraction has 11688 states and 17588 transitions. [2020-10-27 23:49:47,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:49:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 17588 transitions. [2020-10-27 23:49:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:49:47,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:47,101 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] [2020-10-27 23:49:47,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:49:47,101 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -703634438, now seen corresponding path program 1 times [2020-10-27 23:49:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:47,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814640020] [2020-10-27 23:49:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:47,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:47,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:47,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:47,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:49:47,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 23:49:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:49:48,197 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:49:48,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:49:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:49:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:49:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:49:48,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:49:48,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:49:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:49:48,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814640020] [2020-10-27 23:49:48,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:49:48,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:49:48,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258450422] [2020-10-27 23:49:48,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:49:48,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:49:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:49:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:49:48,260 INFO L87 Difference]: Start difference. First operand 11688 states and 17588 transitions. Second operand 8 states. [2020-10-27 23:49:48,620 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:49:49,327 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:50,312 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:49:50,702 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:49:51,004 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:49:51,301 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:49:52,130 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:49:52,459 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:49:52,774 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:49:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:49:56,435 INFO L93 Difference]: Finished difference Result 69798 states and 105128 transitions. [2020-10-27 23:49:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:49:56,436 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 23:49:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:49:56,551 INFO L225 Difference]: With dead ends: 69798 [2020-10-27 23:49:56,551 INFO L226 Difference]: Without dead ends: 58179 [2020-10-27 23:49:56,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:49:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58179 states. [2020-10-27 23:49:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58179 to 11688. [2020-10-27 23:49:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11688 states. [2020-10-27 23:49:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 17460 transitions. [2020-10-27 23:49:58,264 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 17460 transitions. Word has length 71 [2020-10-27 23:49:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:49:58,264 INFO L481 AbstractCegarLoop]: Abstraction has 11688 states and 17460 transitions. [2020-10-27 23:49:58,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:49:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 17460 transitions. [2020-10-27 23:49:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:49:58,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:49:58,265 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] [2020-10-27 23:49:58,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:49:58,266 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:49:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:49:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2091366567, now seen corresponding path program 1 times [2020-10-27 23:49:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:49:58,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587108677] [2020-10-27 23:49:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:49:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:49:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:49:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:03,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:03,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:50:03,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:50:03,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:50:03,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:03,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:50:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:50:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:50:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:03,544 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:50:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:03,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:03,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:03,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:03,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:50:03,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:03,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587108677] [2020-10-27 23:50:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:50:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52237746] [2020-10-27 23:50:03,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:50:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:50:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:03,576 INFO L87 Difference]: Start difference. First operand 11688 states and 17460 transitions. Second operand 5 states. [2020-10-27 23:50:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:07,245 INFO L93 Difference]: Finished difference Result 38614 states and 56932 transitions. [2020-10-27 23:50:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:50:07,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-27 23:50:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:07,288 INFO L225 Difference]: With dead ends: 38614 [2020-10-27 23:50:07,288 INFO L226 Difference]: Without dead ends: 26973 [2020-10-27 23:50:07,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:50:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26973 states. [2020-10-27 23:50:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26973 to 11676. [2020-10-27 23:50:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11676 states. [2020-10-27 23:50:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11676 states to 11676 states and 17442 transitions. [2020-10-27 23:50:09,090 INFO L78 Accepts]: Start accepts. Automaton has 11676 states and 17442 transitions. Word has length 72 [2020-10-27 23:50:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:09,090 INFO L481 AbstractCegarLoop]: Abstraction has 11676 states and 17442 transitions. [2020-10-27 23:50:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:50:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11676 states and 17442 transitions. [2020-10-27 23:50:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 23:50:09,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:09,092 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] [2020-10-27 23:50:09,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:50:09,092 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2127347281, now seen corresponding path program 1 times [2020-10-27 23:50:09,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:09,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552965579] [2020-10-27 23:50:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:09,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:09,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:09,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 23:50:09,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:50:09,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:09,662 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:50:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:09,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:09,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:09,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:09,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552965579] [2020-10-27 23:50:09,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:09,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:09,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162271567] [2020-10-27 23:50:09,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:09,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:09,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:09,693 INFO L87 Difference]: Start difference. First operand 11676 states and 17442 transitions. Second operand 4 states. [2020-10-27 23:50:09,957 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:50:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:12,738 INFO L93 Difference]: Finished difference Result 33015 states and 49153 transitions. [2020-10-27 23:50:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:12,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 23:50:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:12,766 INFO L225 Difference]: With dead ends: 33015 [2020-10-27 23:50:12,767 INFO L226 Difference]: Without dead ends: 21384 [2020-10-27 23:50:12,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21384 states. [2020-10-27 23:50:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21384 to 21125. [2020-10-27 23:50:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21125 states. [2020-10-27 23:50:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21125 states to 21125 states and 30861 transitions. [2020-10-27 23:50:15,253 INFO L78 Accepts]: Start accepts. Automaton has 21125 states and 30861 transitions. Word has length 72 [2020-10-27 23:50:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:15,253 INFO L481 AbstractCegarLoop]: Abstraction has 21125 states and 30861 transitions. [2020-10-27 23:50:15,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21125 states and 30861 transitions. [2020-10-27 23:50:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 23:50:15,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:15,255 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] [2020-10-27 23:50:15,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:50:15,255 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 258825410, now seen corresponding path program 1 times [2020-10-27 23:50:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:15,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349777111] [2020-10-27 23:50:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:15,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:15,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:15,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:16,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:16,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 23:50:16,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:50:16,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-27 23:50:16,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:50:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:50:16,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:16,417 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:50:16,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:16,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:16,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:16,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:16,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:16,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349777111] [2020-10-27 23:50:16,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:16,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232222877] [2020-10-27 23:50:16,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:16,447 INFO L87 Difference]: Start difference. First operand 21125 states and 30861 transitions. Second operand 4 states. [2020-10-27 23:50:16,708 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:50:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:20,469 INFO L93 Difference]: Finished difference Result 41803 states and 61521 transitions. [2020-10-27 23:50:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:20,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-27 23:50:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:20,505 INFO L225 Difference]: With dead ends: 41803 [2020-10-27 23:50:20,505 INFO L226 Difference]: Without dead ends: 30171 [2020-10-27 23:50:20,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30171 states. [2020-10-27 23:50:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30171 to 30168. [2020-10-27 23:50:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30168 states. [2020-10-27 23:50:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30168 states to 30168 states and 43868 transitions. [2020-10-27 23:50:24,121 INFO L78 Accepts]: Start accepts. Automaton has 30168 states and 43868 transitions. Word has length 73 [2020-10-27 23:50:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:24,121 INFO L481 AbstractCegarLoop]: Abstraction has 30168 states and 43868 transitions. [2020-10-27 23:50:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 30168 states and 43868 transitions. [2020-10-27 23:50:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 23:50:24,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:24,133 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 23:50:24,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:50:24,133 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -338700206, now seen corresponding path program 1 times [2020-10-27 23:50:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:24,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163553917] [2020-10-27 23:50:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:24,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:24,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:29,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:29,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:50:29,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:29,429 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:50:29,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:29,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:29,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:29,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:29,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:29,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:29,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:50:29,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163553917] [2020-10-27 23:50:29,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:50:29,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:50:29,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768324860] [2020-10-27 23:50:29,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:50:29,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:50:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:50:29,468 INFO L87 Difference]: Start difference. First operand 30168 states and 43868 transitions. Second operand 4 states. [2020-10-27 23:50:31,447 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:50:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:32,413 INFO L93 Difference]: Finished difference Result 50924 states and 74364 transitions. [2020-10-27 23:50:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:50:32,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-10-27 23:50:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:32,434 INFO L225 Difference]: With dead ends: 50924 [2020-10-27 23:50:32,435 INFO L226 Difference]: Without dead ends: 20809 [2020-10-27 23:50:32,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:50:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20809 states. [2020-10-27 23:50:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20809 to 20806. [2020-10-27 23:50:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20806 states. [2020-10-27 23:50:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20806 states to 20806 states and 30293 transitions. [2020-10-27 23:50:34,739 INFO L78 Accepts]: Start accepts. Automaton has 20806 states and 30293 transitions. Word has length 99 [2020-10-27 23:50:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:50:34,739 INFO L481 AbstractCegarLoop]: Abstraction has 20806 states and 30293 transitions. [2020-10-27 23:50:34,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:50:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20806 states and 30293 transitions. [2020-10-27 23:50:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 23:50:34,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:50:34,754 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 23:50:34,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:50:34,754 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:50:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:50:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1149840867, now seen corresponding path program 1 times [2020-10-27 23:50:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:50:34,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954104455] [2020-10-27 23:50:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:50:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:34,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:38,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:39,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:39,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 23:50:39,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:50:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:50:39,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:50:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:50:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 23:50:39,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:40,077 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:50:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:50:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:50:40,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:50:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:50:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:50:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:50:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:50:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:50:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954104455] [2020-10-27 23:50:40,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:50:40,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 23:50:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273704593] [2020-10-27 23:50:40,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:50:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:50:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:50:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:50:40,115 INFO L87 Difference]: Start difference. First operand 20806 states and 30293 transitions. Second operand 8 states. [2020-10-27 23:50:40,422 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:50:42,039 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 23:50:42,309 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:50:42,562 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 23:50:43,160 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:50:43,448 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:50:43,707 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 23:50:43,961 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 23:50:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:50:58,666 INFO L93 Difference]: Finished difference Result 159393 states and 232615 transitions. [2020-10-27 23:50:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:50:58,667 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-27 23:50:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:50:59,036 INFO L225 Difference]: With dead ends: 159393 [2020-10-27 23:50:59,037 INFO L226 Difference]: Without dead ends: 138718 [2020-10-27 23:50:59,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:50:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138718 states. [2020-10-27 23:51:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138718 to 50278. [2020-10-27 23:51:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50278 states. [2020-10-27 23:51:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50278 states to 50278 states and 72821 transitions. [2020-10-27 23:51:06,289 INFO L78 Accepts]: Start accepts. Automaton has 50278 states and 72821 transitions. Word has length 100 [2020-10-27 23:51:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:06,290 INFO L481 AbstractCegarLoop]: Abstraction has 50278 states and 72821 transitions. [2020-10-27 23:51:06,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:51:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 50278 states and 72821 transitions. [2020-10-27 23:51:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 23:51:06,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:06,300 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 23:51:06,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:51:06,300 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1761440011, now seen corresponding path program 1 times [2020-10-27 23:51:06,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:06,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847721926] [2020-10-27 23:51:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:06,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:06,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:06,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:08,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:09,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:10,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:11,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:11,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 23:51:11,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 23:51:11,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:11,765 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:51:11,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:11,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:11,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:11,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:11,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:11,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:11,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847721926] [2020-10-27 23:51:11,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:51:11,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 23:51:11,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433477892] [2020-10-27 23:51:11,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:51:11,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:51:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:51:11,815 INFO L87 Difference]: Start difference. First operand 50278 states and 72821 transitions. Second operand 9 states. [2020-10-27 23:51:12,133 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:51:15,614 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:51:15,923 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:51:16,558 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:51:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:51:38,941 INFO L93 Difference]: Finished difference Result 198238 states and 285213 transitions. [2020-10-27 23:51:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 23:51:38,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2020-10-27 23:51:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:51:39,339 INFO L225 Difference]: With dead ends: 198238 [2020-10-27 23:51:39,339 INFO L226 Difference]: Without dead ends: 160587 [2020-10-27 23:51:39,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:51:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160587 states. [2020-10-27 23:51:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160587 to 83516. [2020-10-27 23:51:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83516 states. [2020-10-27 23:51:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83516 states to 83516 states and 120691 transitions. [2020-10-27 23:51:52,719 INFO L78 Accepts]: Start accepts. Automaton has 83516 states and 120691 transitions. Word has length 100 [2020-10-27 23:51:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:51:52,719 INFO L481 AbstractCegarLoop]: Abstraction has 83516 states and 120691 transitions. [2020-10-27 23:51:52,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:51:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 83516 states and 120691 transitions. [2020-10-27 23:51:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 23:51:52,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:51:52,729 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 23:51:52,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:51:52,729 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:51:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:51:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2047341729, now seen corresponding path program 1 times [2020-10-27 23:51:52,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:51:52,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241478892] [2020-10-27 23:51:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:51:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:55,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:51:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:51:57,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 23:51:57,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:58,270 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 23:51:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:51:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:51:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:51:58,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:51:58,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:51:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:51:58,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241478892] [2020-10-27 23:51:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:51:58,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 23:51:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175077747] [2020-10-27 23:51:58,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:51:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:51:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:51:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:51:58,322 INFO L87 Difference]: Start difference. First operand 83516 states and 120691 transitions. Second operand 10 states. [2020-10-27 23:51:58,637 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:52:01,902 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:52:02,537 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 173