/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:05:53,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:05:53,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:05:53,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:05:53,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:05:53,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:05:53,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:05:53,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:05:53,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:05:53,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:05:53,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:05:53,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:05:53,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:05:53,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:05:53,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:05:53,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:05:53,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:05:53,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:05:53,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:05:53,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:05:53,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:05:53,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:05:53,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:05:53,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:05:53,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:05:53,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:05:53,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:05:53,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:05:53,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:05:53,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:05:53,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:05:53,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:05:53,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:05:53,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:05:53,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:05:53,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:05:53,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:05:53,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:05:53,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:05:53,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:05:53,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:05:53,946 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 [2020-09-25 00:05:54,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:05:54,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:05:54,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:05:54,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:05:54,008 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:05:54,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:05:54,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:05:54,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:05:54,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:05:54,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:05:54,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:05:54,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:05:54,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:05:54,011 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:05:54,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:05:54,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:05:54,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:05:54,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:05:54,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:05:54,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:05:54,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:05:54,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:54,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:05:54,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:05:54,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:05:54,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:05:54,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:05:54,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:05:54,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:05:54,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-25 00:05:54,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:05:54,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:05:54,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:05:54,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:05:54,519 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:05:54,520 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 00:05:54,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47a698f65/19218832398a418cac2d612b3ce3eaad/FLAG6a599e3c4 [2020-09-25 00:05:55,173 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:05:55,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 00:05:55,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47a698f65/19218832398a418cac2d612b3ce3eaad/FLAG6a599e3c4 [2020-09-25 00:05:55,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47a698f65/19218832398a418cac2d612b3ce3eaad [2020-09-25 00:05:55,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:05:55,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:05:55,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:55,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:05:55,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:05:55,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7f3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55, skipping insertion in model container [2020-09-25 00:05:55,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:05:55,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:05:55,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:55,815 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:05:55,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:55,853 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:05:55,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55 WrapperNode [2020-09-25 00:05:55,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:55,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:05:55,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:05:55,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:05:55,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... [2020-09-25 00:05:55,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:05:55,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:05:55,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:05:55,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:05:55,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:56,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:05:56,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:05:56,045 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:05:56,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:05:56,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:05:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:05:56,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:05:56,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:05:56,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:05:56,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:05:56,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:05:56,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:05:56,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:05:56,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:05:56,336 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:05:56,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:56 BoogieIcfgContainer [2020-09-25 00:05:56,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:05:56,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:05:56,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:05:56,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:05:56,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:05:55" (1/3) ... [2020-09-25 00:05:56,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d732ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:56, skipping insertion in model container [2020-09-25 00:05:56,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:55" (2/3) ... [2020-09-25 00:05:56,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d732ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:56, skipping insertion in model container [2020-09-25 00:05:56,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:56" (3/3) ... [2020-09-25 00:05:56,360 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-09-25 00:05:56,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:05:56,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:05:56,402 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:05:56,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:05:56,435 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:05:56,435 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:05:56,435 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:05:56,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:05:56,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:05:56,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:05:56,436 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:05:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 00:05:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:05:56,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:56,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:56,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2104509233, now seen corresponding path program 1 times [2020-09-25 00:05:56,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:56,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495046691] [2020-09-25 00:05:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:56,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:05:56,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 00:05:56,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:56,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 00:05:56,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:56,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:05:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:56,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:56,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:56,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:56,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495046691] [2020-09-25 00:05:56,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:56,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 00:05:56,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740231923] [2020-09-25 00:05:56,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 00:05:56,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:56,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 00:05:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:05:56,846 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 00:05:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:56,881 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 00:05:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 00:05:56,883 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-25 00:05:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:56,894 INFO L225 Difference]: With dead ends: 41 [2020-09-25 00:05:56,894 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 00:05:56,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:05:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 00:05:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 00:05:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 00:05:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-25 00:05:56,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-25 00:05:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:56,953 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-25 00:05:56,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 00:05:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-25 00:05:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:05:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:56,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:56,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:05:56,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2097121065, now seen corresponding path program 1 times [2020-09-25 00:05:56,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:56,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837830592] [2020-09-25 00:05:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:05:57,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 00:05:57,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:05:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:05:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:05:57,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:57,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:57,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:57,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:57,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837830592] [2020-09-25 00:05:57,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:57,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:05:57,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827076665] [2020-09-25 00:05:57,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:05:57,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:05:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:05:57,054 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-09-25 00:05:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:57,084 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-25 00:05:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:05:57,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-25 00:05:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:57,086 INFO L225 Difference]: With dead ends: 28 [2020-09-25 00:05:57,087 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 00:05:57,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:05:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 00:05:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 00:05:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 00:05:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 00:05:57,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 00:05:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:57,107 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 00:05:57,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:05:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 00:05:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 00:05:57,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:57,109 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] [2020-09-25 00:05:57,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:05:57,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -588245929, now seen corresponding path program 1 times [2020-09-25 00:05:57,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:57,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431214865] [2020-09-25 00:05:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 00:05:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-09-25 00:05:57,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:05:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:05:57,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:05:57,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:57,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:57,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:57,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431214865] [2020-09-25 00:05:57,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:57,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:05:57,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886591769] [2020-09-25 00:05:57,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:05:57,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:05:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:57,705 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-09-25 00:05:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:57,913 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-25 00:05:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 00:05:57,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-25 00:05:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:57,915 INFO L225 Difference]: With dead ends: 35 [2020-09-25 00:05:57,915 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:05:57,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:05:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:05:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 00:05:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 00:05:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 00:05:57,923 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 00:05:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:57,923 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 00:05:57,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:05:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 00:05:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 00:05:57,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:57,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:57,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:05:57,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -590441495, now seen corresponding path program 2 times [2020-09-25 00:05:57,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:57,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414596553] [2020-09-25 00:05:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:58,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 00:05:58,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:05:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-09-25 00:05:58,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:58,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:05:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:05:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 00:05:58,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:58,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:58,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:58,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:58,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:58,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:58,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:58,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:58,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414596553] [2020-09-25 00:05:58,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:58,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:05:58,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032361982] [2020-09-25 00:05:58,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:05:58,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:58,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:05:58,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:05:58,554 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-09-25 00:05:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:58,762 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-25 00:05:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 00:05:58,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-09-25 00:05:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:58,764 INFO L225 Difference]: With dead ends: 38 [2020-09-25 00:05:58,765 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 00:05:58,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:05:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 00:05:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 00:05:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 00:05:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 00:05:58,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 00:05:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:58,772 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 00:05:58,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:05:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 00:05:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:05:58,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:58,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:58,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:05:58,774 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -934609001, now seen corresponding path program 3 times [2020-09-25 00:05:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:58,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594344674] [2020-09-25 00:05:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:59,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:05:59,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:05:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-09-25 00:05:59,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:05:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:05:59,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 00:05:59,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:59,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:59,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:59,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:59,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:59,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:59,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:59,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:59,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:59,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594344674] [2020-09-25 00:05:59,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:59,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:05:59,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24659484] [2020-09-25 00:05:59,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:05:59,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:59,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:05:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:05:59,751 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-09-25 00:06:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:00,033 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-25 00:06:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 00:06:00,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-09-25 00:06:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:00,035 INFO L225 Difference]: With dead ends: 43 [2020-09-25 00:06:00,035 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 00:06:00,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:06:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 00:06:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 00:06:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 00:06:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 00:06:00,043 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 00:06:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:00,043 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 00:06:00,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:06:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 00:06:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 00:06:00,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:00,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:00,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:06:00,046 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:00,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1774497961, now seen corresponding path program 4 times [2020-09-25 00:06:00,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:00,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053509730] [2020-09-25 00:06:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 00:06:00,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:06:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-09-25 00:06:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 00:06:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 00:06:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:01,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:01,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:01,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053509730] [2020-09-25 00:06:01,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:01,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 00:06:01,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031786397] [2020-09-25 00:06:01,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 00:06:01,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 00:06:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:06:01,093 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-09-25 00:06:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:01,462 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-09-25 00:06:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 00:06:01,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-09-25 00:06:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:01,464 INFO L225 Difference]: With dead ends: 48 [2020-09-25 00:06:01,464 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 00:06:01,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-09-25 00:06:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 00:06:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-25 00:06:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 00:06:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 00:06:01,471 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 00:06:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:01,471 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 00:06:01,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 00:06:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 00:06:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 00:06:01,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:01,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:01,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:06:01,474 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash -194454825, now seen corresponding path program 5 times [2020-09-25 00:06:01,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:01,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103878864] [2020-09-25 00:06:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:01,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:02,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 00:06:02,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:06:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1272 [2020-09-25 00:06:02,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:06:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:02,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 00:06:02,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:03,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:03,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:03,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:03,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:03,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:03,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:03,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103878864] [2020-09-25 00:06:03,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:03,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 00:06:03,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498322789] [2020-09-25 00:06:03,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 00:06:03,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 00:06:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:06:03,105 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-09-25 00:06:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:03,629 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-09-25 00:06:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 00:06:03,629 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-09-25 00:06:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:03,631 INFO L225 Difference]: With dead ends: 53 [2020-09-25 00:06:03,631 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 00:06:03,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 00:06:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 00:06:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-25 00:06:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 00:06:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-25 00:06:03,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-25 00:06:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:03,639 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-25 00:06:03,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 00:06:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-25 00:06:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:06:03,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:03,640 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:03,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:06:03,641 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1783487849, now seen corresponding path program 6 times [2020-09-25 00:06:03,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:03,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296595144] [2020-09-25 00:06:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:05,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:06:05,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:06:05,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1930 [2020-09-25 00:06:05,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:05,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 00:06:05,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:05,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 00:06:05,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:05,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:05,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:05,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:05,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:05,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:05,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296595144] [2020-09-25 00:06:05,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:05,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 00:06:05,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103923508] [2020-09-25 00:06:05,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 00:06:05,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 00:06:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:06:05,999 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-09-25 00:06:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:06,636 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 00:06:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 00:06:06,636 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-09-25 00:06:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:06,637 INFO L225 Difference]: With dead ends: 58 [2020-09-25 00:06:06,637 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 00:06:06,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 00:06:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 00:06:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-25 00:06:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:06:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 00:06:06,653 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-25 00:06:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:06,653 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 00:06:06,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 00:06:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 00:06:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:06:06,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:06,657 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:06,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:06:06,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1046324759, now seen corresponding path program 7 times [2020-09-25 00:06:06,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:06,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742623560] [2020-09-25 00:06:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:06,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:06:08,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:06:08,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2202 [2020-09-25 00:06:08,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:06:08,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:08,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 00:06:08,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:09,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:09,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:09,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:09,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:09,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:09,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742623560] [2020-09-25 00:06:09,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:09,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 00:06:09,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857484956] [2020-09-25 00:06:09,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 00:06:09,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 00:06:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:06:09,339 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2020-09-25 00:06:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:10,152 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-25 00:06:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 00:06:10,153 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-09-25 00:06:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:10,154 INFO L225 Difference]: With dead ends: 63 [2020-09-25 00:06:10,154 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 00:06:10,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2020-09-25 00:06:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 00:06:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 00:06:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 00:06:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-25 00:06:10,162 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-25 00:06:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:10,163 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-25 00:06:10,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 00:06:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-25 00:06:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 00:06:10,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:10,164 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:10,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:06:10,165 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 232135209, now seen corresponding path program 8 times [2020-09-25 00:06:10,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:10,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919643736] [2020-09-25 00:06:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 00:06:13,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:06:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3131 [2020-09-25 00:06:13,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-25 00:06:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 00:06:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:13,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:13,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:13,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:13,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:13,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919643736] [2020-09-25 00:06:13,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:13,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 00:06:13,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933083267] [2020-09-25 00:06:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 00:06:13,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 00:06:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-09-25 00:06:13,946 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2020-09-25 00:06:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:15,089 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-09-25 00:06:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-25 00:06:15,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-09-25 00:06:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:15,091 INFO L225 Difference]: With dead ends: 68 [2020-09-25 00:06:15,091 INFO L226 Difference]: Without dead ends: 63 [2020-09-25 00:06:15,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 00:06:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-25 00:06:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-25 00:06:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 00:06:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-25 00:06:15,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-25 00:06:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:15,101 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-25 00:06:15,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 00:06:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-25 00:06:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 00:06:15,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:15,103 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:15,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:06:15,103 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 977101143, now seen corresponding path program 9 times [2020-09-25 00:06:15,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:15,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276167707] [2020-09-25 00:06:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:18,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:18,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 00:06:18,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:06:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3300 [2020-09-25 00:06:18,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 00:06:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 00:06:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:19,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:19,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:19,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:19,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:19,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:19,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276167707] [2020-09-25 00:06:19,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:19,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 00:06:19,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832949203] [2020-09-25 00:06:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 00:06:19,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 00:06:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 00:06:19,140 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 33 states. [2020-09-25 00:06:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:20,679 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-09-25 00:06:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 00:06:20,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-09-25 00:06:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:20,681 INFO L225 Difference]: With dead ends: 73 [2020-09-25 00:06:20,682 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 00:06:20,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=2998, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 00:06:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 00:06:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-25 00:06:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 00:06:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-25 00:06:20,691 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-25 00:06:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:20,691 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-25 00:06:20,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 00:06:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-25 00:06:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 00:06:20,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:20,693 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:20,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:06:20,693 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash 751396585, now seen corresponding path program 10 times [2020-09-25 00:06:20,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:20,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139740423] [2020-09-25 00:06:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:20,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:23,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:24,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:25,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 00:06:25,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:06:25,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 00:06:25,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 00:06:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:06:25,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 00:06:25,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:26,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:26,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:26,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:26,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:26,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:26,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139740423] [2020-09-25 00:06:26,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:26,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-25 00:06:26,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113752832] [2020-09-25 00:06:26,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-25 00:06:26,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-25 00:06:26,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 00:06:26,615 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2020-09-25 00:06:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:28,714 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-25 00:06:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 00:06:28,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-09-25 00:06:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:28,715 INFO L225 Difference]: With dead ends: 67 [2020-09-25 00:06:28,715 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 00:06:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2020-09-25 00:06:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 00:06:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 00:06:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 00:06:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 00:06:28,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-25 00:06:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:28,718 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 00:06:28,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-25 00:06:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 00:06:28,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 00:06:28,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:06:28,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 00:06:29,015 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-09-25 00:06:29,020 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 00:06:29,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 00:06:29,021 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 00:06:29,021 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 00:06:29,022 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 00:06:29,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 00:06:29,022 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 00:06:29,022 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 00:06:29,022 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 00:06:29,023 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 00:06:29,023 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 00:06:29,023 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-09-25 00:06:29,023 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 00:06:29,024 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 00:06:29,024 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-25 00:06:29,024 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 00:06:29,024 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-09-25 00:06:29,024 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-09-25 00:06:29,025 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 00:06:29,025 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 00:06:29,025 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-25 00:06:29,025 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-25 00:06:29,025 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 00:06:29,028 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (let ((.cse4 (<= main_~x~0 (+ main_~y~0 16)))) (or (let ((.cse0 (+ main_~x~0 51))) (and (<= .cse0 main_~y~0) (<= main_~y~0 .cse0))) (let ((.cse1 (+ main_~x~0 50))) (and (<= 0 .cse1) (<= .cse1 0))) (let ((.cse3 (* 2 main_~y~0)) (.cse2 (+ main_~x~0 53))) (and (<= .cse2 .cse3) .cse4 (<= .cse3 .cse2))) (and (<= main_~x~0 17) (<= (+ main_~x~0 60) (* 4 main_~y~0))) (and .cse4 (<= (+ main_~x~0 4) (* 6 main_~y~0))) (let ((.cse6 (* 3 main_~y~0)) (.cse5 (+ main_~x~0 56))) (and .cse4 (<= .cse5 .cse6) (<= .cse6 .cse5))))) [2020-09-25 00:06:29,028 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 11 main_~y~0) (<= (+ main_~x~0 95) (* 9 main_~y~0))) (and (<= main_~x~0 (+ main_~y~0 16)) (<= (+ main_~x~0 4) (* 6 main_~y~0)) (<= 1 main_~y~0))) [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 00:06:29,029 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 00:06:29,030 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 00:06:29,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:06:29 BoogieIcfgContainer [2020-09-25 00:06:29,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:06:29,079 INFO L168 Benchmark]: Toolchain (without parser) took 33533.74 ms. Allocated memory was 140.5 MB in the beginning and 398.5 MB in the end (delta: 257.9 MB). Free memory was 103.5 MB in the beginning and 153.0 MB in the end (delta: -49.5 MB). Peak memory consumption was 208.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:06:29,081 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:06:29,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.32 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:06:29,083 INFO L168 Benchmark]: Boogie Preprocessor took 114.91 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:06:29,084 INFO L168 Benchmark]: RCFGBuilder took 372.00 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 00:06:29,093 INFO L168 Benchmark]: TraceAbstraction took 32718.22 ms. Allocated memory was 203.4 MB in the beginning and 398.5 MB in the end (delta: 195.0 MB). Free memory was 169.6 MB in the beginning and 153.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 211.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:06:29,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.32 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.91 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.00 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 169.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32718.22 ms. Allocated memory was 203.4 MB in the beginning and 398.5 MB in the end (delta: 195.0 MB). Free memory was 169.6 MB in the beginning and 153.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 211.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((((x + 51 <= y && y <= x + 51) || (0 <= x + 50 && x + 50 <= 0)) || ((x + 53 <= 2 * y && x <= y + 16) && 2 * y <= x + 53)) || (x <= 17 && x + 60 <= 4 * y)) || (x <= y + 16 && x + 4 <= 6 * y)) || ((x <= y + 16 && x + 56 <= 3 * y) && 3 * y <= x + 56) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.2s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 249 SDslu, 2142 SDs, 0 SdLazy, 5086 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 38 NumberOfFragments, 120 HoareAnnotationTreeSize, 18 FomulaSimplifications, 89 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 170 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 23.6s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 455 ConstructedInterpolants, 0 QuantifiedInterpolants, 109615 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...