/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:17:08,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:17:08,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:17:08,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:17:08,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:17:08,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:17:08,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:17:08,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:17:08,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:17:08,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:17:08,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:17:08,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:17:08,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:17:08,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:17:08,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:17:08,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:17:08,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:17:08,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:17:08,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:17:08,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:17:08,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:17:08,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:17:08,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:17:08,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:17:08,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:17:08,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:17:08,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:17:08,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:17:08,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:17:08,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 06:17:08,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:17:08,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:17:08,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:17:08,907 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 [2020-08-22 06:17:08,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:17:08,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:17:08,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:17:08,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:17:08,930 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:17:08,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:17:08,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:17:08,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:17:08,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:17:08,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:17:08,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:17:08,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:17:08,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:17:08,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:17:08,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:17:08,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:17:08,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:17:08,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:17:08,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:17:08,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:17:08,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:17:08,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:17:08,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:17:08,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:17:08,935 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:17:09,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:17:09,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:17:09,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:17:09,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:17:09,263 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:17:09,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 06:17:09,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c203d4b/e531363de3cb4cd8b99b9c287bf820a9/FLAG3ec9995a2 [2020-08-22 06:17:09,744 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:17:09,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 06:17:09,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c203d4b/e531363de3cb4cd8b99b9c287bf820a9/FLAG3ec9995a2 [2020-08-22 06:17:10,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35c203d4b/e531363de3cb4cd8b99b9c287bf820a9 [2020-08-22 06:17:10,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:17:10,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:17:10,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:10,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:17:10,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:17:10,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277364e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10, skipping insertion in model container [2020-08-22 06:17:10,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:17:10,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:17:10,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:10,334 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:17:10,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:10,377 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:17:10,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10 WrapperNode [2020-08-22 06:17:10,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:10,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:17:10,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:17:10,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:17:10,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (1/1) ... [2020-08-22 06:17:10,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:17:10,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:17:10,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:17:10,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:17:10,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (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 [2020-08-22 06:17:10,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:17:10,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:17:10,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:17:10,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:17:10,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:17:10,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:17:10,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:17:10,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:17:10,856 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:17:10,856 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 06:17:10,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:10 BoogieIcfgContainer [2020-08-22 06:17:10,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:17:10,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:17:10,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:17:10,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:17:10,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:17:10" (1/3) ... [2020-08-22 06:17:10,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4a43d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:10, skipping insertion in model container [2020-08-22 06:17:10,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:10" (2/3) ... [2020-08-22 06:17:10,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4a43d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:10, skipping insertion in model container [2020-08-22 06:17:10,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:10" (3/3) ... [2020-08-22 06:17:10,871 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 06:17:10,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:17:10,892 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:17:10,909 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:17:10,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:17:10,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:17:10,956 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:17:10,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:17:10,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:17:10,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:17:10,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:17:10,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:17:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 06:17:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:11,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,003 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] [2020-08-22 06:17:11,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-22 06:17:11,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793355988] [2020-08-22 06:17:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793355988] [2020-08-22 06:17:11,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217432391] [2020-08-22 06:17:11,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,236 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 06:17:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,295 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-22 06:17:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,312 INFO L225 Difference]: With dead ends: 93 [2020-08-22 06:17:11,312 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 06:17:11,319 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 [2020-08-22 06:17:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 06:17:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-22 06:17:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 06:17:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-22 06:17:11,361 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-22 06:17:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,362 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-22 06:17:11,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-22 06:17:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:11,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,364 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] [2020-08-22 06:17:11,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:17:11,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-22 06:17:11,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200477293] [2020-08-22 06:17:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200477293] [2020-08-22 06:17:11,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894855815] [2020-08-22 06:17:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,468 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-22 06:17:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,501 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-22 06:17:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,504 INFO L225 Difference]: With dead ends: 127 [2020-08-22 06:17:11,504 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 06:17:11,506 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 [2020-08-22 06:17:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 06:17:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 06:17:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 06:17:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-22 06:17:11,525 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-22 06:17:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,526 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-22 06:17:11,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-22 06:17:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:11,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:17:11,528 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-22 06:17:11,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383525630] [2020-08-22 06:17:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383525630] [2020-08-22 06:17:11,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818259907] [2020-08-22 06:17:11,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,619 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-22 06:17:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,647 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-22 06:17:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,649 INFO L225 Difference]: With dead ends: 117 [2020-08-22 06:17:11,649 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 06:17:11,650 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 [2020-08-22 06:17:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 06:17:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-22 06:17:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 06:17:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-22 06:17:11,661 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-22 06:17:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,662 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-22 06:17:11,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-22 06:17:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:11,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:17:11,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-22 06:17:11,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730103943] [2020-08-22 06:17:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730103943] [2020-08-22 06:17:11,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734299155] [2020-08-22 06:17:11,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,709 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-22 06:17:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,730 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-22 06:17:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,732 INFO L225 Difference]: With dead ends: 148 [2020-08-22 06:17:11,733 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 06:17:11,733 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 [2020-08-22 06:17:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 06:17:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-22 06:17:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 06:17:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-22 06:17:11,750 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-22 06:17:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,751 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-22 06:17:11,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-22 06:17:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:11,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:17:11,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-22 06:17:11,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250699863] [2020-08-22 06:17:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250699863] [2020-08-22 06:17:11,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187183767] [2020-08-22 06:17:11,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,834 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-22 06:17:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,858 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-22 06:17:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,861 INFO L225 Difference]: With dead ends: 244 [2020-08-22 06:17:11,861 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 06:17:11,863 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 [2020-08-22 06:17:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 06:17:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-22 06:17:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-22 06:17:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-22 06:17:11,878 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-22 06:17:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,878 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-22 06:17:11,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-22 06:17:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:11,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:17:11,881 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-22 06:17:11,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428697011] [2020-08-22 06:17:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:11,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428697011] [2020-08-22 06:17:11,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571023725] [2020-08-22 06:17:11,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,922 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-22 06:17:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,954 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-22 06:17:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,956 INFO L225 Difference]: With dead ends: 219 [2020-08-22 06:17:11,956 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 06:17:11,957 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 [2020-08-22 06:17:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 06:17:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-22 06:17:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 06:17:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-22 06:17:11,971 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-22 06:17:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,972 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-22 06:17:11,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-22 06:17:11,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:11,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:17:11,974 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-22 06:17:11,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248874667] [2020-08-22 06:17:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248874667] [2020-08-22 06:17:12,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598749569] [2020-08-22 06:17:12,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,006 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-22 06:17:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,024 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-22 06:17:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,027 INFO L225 Difference]: With dead ends: 276 [2020-08-22 06:17:12,027 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 06:17:12,028 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 [2020-08-22 06:17:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 06:17:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-22 06:17:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 06:17:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-22 06:17:12,042 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-22 06:17:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,042 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-22 06:17:12,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-22 06:17:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:12,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:17:12,045 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-22 06:17:12,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305252057] [2020-08-22 06:17:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305252057] [2020-08-22 06:17:12,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194863858] [2020-08-22 06:17:12,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,080 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-22 06:17:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,101 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-22 06:17:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,103 INFO L225 Difference]: With dead ends: 472 [2020-08-22 06:17:12,103 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 06:17:12,105 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 [2020-08-22 06:17:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 06:17:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-22 06:17:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 06:17:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-22 06:17:12,126 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-22 06:17:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,127 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-22 06:17:12,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-22 06:17:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:12,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:17:12,132 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-22 06:17:12,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159106372] [2020-08-22 06:17:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159106372] [2020-08-22 06:17:12,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782848153] [2020-08-22 06:17:12,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,167 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-22 06:17:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,185 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-22 06:17:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,188 INFO L225 Difference]: With dead ends: 420 [2020-08-22 06:17:12,188 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 06:17:12,189 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 [2020-08-22 06:17:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 06:17:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-22 06:17:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-22 06:17:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-22 06:17:12,201 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-22 06:17:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,201 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-22 06:17:12,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-22 06:17:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:12,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:17:12,203 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-22 06:17:12,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242829287] [2020-08-22 06:17:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242829287] [2020-08-22 06:17:12,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850700586] [2020-08-22 06:17:12,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,231 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-22 06:17:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,252 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-22 06:17:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,256 INFO L225 Difference]: With dead ends: 524 [2020-08-22 06:17:12,256 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 06:17:12,257 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 [2020-08-22 06:17:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 06:17:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-22 06:17:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 06:17:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-22 06:17:12,277 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-22 06:17:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,277 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-22 06:17:12,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-22 06:17:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:17:12,280 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-22 06:17:12,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030179738] [2020-08-22 06:17:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030179738] [2020-08-22 06:17:12,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89286660] [2020-08-22 06:17:12,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,332 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-22 06:17:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,373 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-22 06:17:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,377 INFO L225 Difference]: With dead ends: 924 [2020-08-22 06:17:12,377 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 06:17:12,379 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 [2020-08-22 06:17:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 06:17:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-22 06:17:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-22 06:17:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-22 06:17:12,404 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-22 06:17:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,404 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-22 06:17:12,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-22 06:17:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:12,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:17:12,410 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-22 06:17:12,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489553712] [2020-08-22 06:17:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489553712] [2020-08-22 06:17:12,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308221320] [2020-08-22 06:17:12,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,457 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-22 06:17:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,479 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-22 06:17:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,483 INFO L225 Difference]: With dead ends: 816 [2020-08-22 06:17:12,483 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 06:17:12,484 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 [2020-08-22 06:17:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 06:17:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-22 06:17:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 06:17:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-22 06:17:12,500 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-22 06:17:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,500 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-22 06:17:12,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-22 06:17:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:12,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:17:12,502 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-22 06:17:12,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607421896] [2020-08-22 06:17:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607421896] [2020-08-22 06:17:12,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273094042] [2020-08-22 06:17:12,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,528 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-22 06:17:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,551 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-22 06:17:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,557 INFO L225 Difference]: With dead ends: 1004 [2020-08-22 06:17:12,558 INFO L226 Difference]: Without dead ends: 1002 [2020-08-22 06:17:12,558 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 [2020-08-22 06:17:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-22 06:17:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-22 06:17:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 06:17:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-22 06:17:12,584 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-22 06:17:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,584 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-22 06:17:12,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-22 06:17:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:12,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:17:12,587 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-22 06:17:12,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264723876] [2020-08-22 06:17:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264723876] [2020-08-22 06:17:12,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347835087] [2020-08-22 06:17:12,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,612 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-22 06:17:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,643 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-22 06:17:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,649 INFO L225 Difference]: With dead ends: 1820 [2020-08-22 06:17:12,649 INFO L226 Difference]: Without dead ends: 1066 [2020-08-22 06:17:12,651 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 [2020-08-22 06:17:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-22 06:17:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-22 06:17:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-22 06:17:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-22 06:17:12,698 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-22 06:17:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,698 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-22 06:17:12,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-22 06:17:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:12,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:17:12,700 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-22 06:17:12,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121536745] [2020-08-22 06:17:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121536745] [2020-08-22 06:17:12,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718852941] [2020-08-22 06:17:12,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,728 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-22 06:17:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,760 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-22 06:17:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,767 INFO L225 Difference]: With dead ends: 1596 [2020-08-22 06:17:12,767 INFO L226 Difference]: Without dead ends: 1082 [2020-08-22 06:17:12,770 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 [2020-08-22 06:17:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-22 06:17:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-22 06:17:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-22 06:17:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-22 06:17:12,798 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-22 06:17:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,800 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-22 06:17:12,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-22 06:17:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:12,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:17:12,802 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-22 06:17:12,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312693344] [2020-08-22 06:17:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312693344] [2020-08-22 06:17:12,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830912250] [2020-08-22 06:17:12,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,831 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-22 06:17:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,873 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-22 06:17:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,882 INFO L225 Difference]: With dead ends: 1932 [2020-08-22 06:17:12,882 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 06:17:12,883 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 [2020-08-22 06:17:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 06:17:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-22 06:17:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 06:17:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-22 06:17:12,938 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-22 06:17:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,939 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-22 06:17:12,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-22 06:17:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:12,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 06:17:12,945 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-22 06:17:12,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184447692] [2020-08-22 06:17:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184447692] [2020-08-22 06:17:12,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791166205] [2020-08-22 06:17:12,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,976 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-22 06:17:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,039 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-22 06:17:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,050 INFO L225 Difference]: With dead ends: 3596 [2020-08-22 06:17:13,051 INFO L226 Difference]: Without dead ends: 2090 [2020-08-22 06:17:13,054 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 [2020-08-22 06:17:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-22 06:17:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-22 06:17:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-22 06:17:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-22 06:17:13,139 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-22 06:17:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,139 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-22 06:17:13,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-22 06:17:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 06:17:13,144 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-22 06:17:13,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318787761] [2020-08-22 06:17:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:13,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318787761] [2020-08-22 06:17:13,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547297854] [2020-08-22 06:17:13,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,184 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-22 06:17:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,232 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-22 06:17:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,242 INFO L225 Difference]: With dead ends: 3132 [2020-08-22 06:17:13,242 INFO L226 Difference]: Without dead ends: 2122 [2020-08-22 06:17:13,245 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 [2020-08-22 06:17:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-22 06:17:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-22 06:17:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-22 06:17:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-22 06:17:13,330 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-22 06:17:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,330 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-22 06:17:13,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-22 06:17:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:13,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 06:17:13,334 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-22 06:17:13,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245377040] [2020-08-22 06:17:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:13,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245377040] [2020-08-22 06:17:13,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616929522] [2020-08-22 06:17:13,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,362 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-22 06:17:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,427 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-22 06:17:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,444 INFO L225 Difference]: With dead ends: 3724 [2020-08-22 06:17:13,444 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 06:17:13,445 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 [2020-08-22 06:17:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 06:17:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-22 06:17:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-22 06:17:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-22 06:17:13,523 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-22 06:17:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,523 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-22 06:17:13,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-22 06:17:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:13,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 06:17:13,528 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-22 06:17:13,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31302714] [2020-08-22 06:17:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:13,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31302714] [2020-08-22 06:17:13,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712999039] [2020-08-22 06:17:13,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,556 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-22 06:17:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,618 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-22 06:17:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,636 INFO L225 Difference]: With dead ends: 7116 [2020-08-22 06:17:13,636 INFO L226 Difference]: Without dead ends: 4106 [2020-08-22 06:17:13,642 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 [2020-08-22 06:17:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-22 06:17:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-22 06:17:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-22 06:17:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-22 06:17:13,778 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-22 06:17:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,779 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-22 06:17:13,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-22 06:17:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:17:13,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 06:17:13,789 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-22 06:17:13,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998893831] [2020-08-22 06:17:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:13,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998893831] [2020-08-22 06:17:13,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828067730] [2020-08-22 06:17:13,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,824 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-22 06:17:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,882 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-22 06:17:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 06:17:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,915 INFO L225 Difference]: With dead ends: 6156 [2020-08-22 06:17:13,916 INFO L226 Difference]: Without dead ends: 4170 [2020-08-22 06:17:13,920 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 [2020-08-22 06:17:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-22 06:17:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-22 06:17:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-22 06:17:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-22 06:17:14,027 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-22 06:17:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:14,027 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-22 06:17:14,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-22 06:17:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:17:14,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:14,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:14,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 06:17:14,033 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-22 06:17:14,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:14,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999184180] [2020-08-22 06:17:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:14,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999184180] [2020-08-22 06:17:14,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:14,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:14,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900997193] [2020-08-22 06:17:14,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:14,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:14,058 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-22 06:17:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:14,169 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-22 06:17:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:14,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 06:17:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:14,199 INFO L225 Difference]: With dead ends: 12108 [2020-08-22 06:17:14,199 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 06:17:14,211 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 [2020-08-22 06:17:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 06:17:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-22 06:17:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 06:17:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-22 06:17:14,558 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-22 06:17:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:14,559 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-22 06:17:14,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-22 06:17:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:17:14,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:14,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:14,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 06:17:14,568 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-22 06:17:14,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:14,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591838837] [2020-08-22 06:17:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:14,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591838837] [2020-08-22 06:17:14,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:14,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:14,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970305838] [2020-08-22 06:17:14,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:14,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:14,618 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-22 06:17:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:14,734 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-22 06:17:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:14,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 06:17:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:14,753 INFO L225 Difference]: With dead ends: 9100 [2020-08-22 06:17:14,754 INFO L226 Difference]: Without dead ends: 9098 [2020-08-22 06:17:14,758 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 [2020-08-22 06:17:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-22 06:17:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-22 06:17:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 06:17:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-22 06:17:15,106 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-22 06:17:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:15,107 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-22 06:17:15,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-22 06:17:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 06:17:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:15,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:15,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 06:17:15,122 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-22 06:17:15,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:15,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031157990] [2020-08-22 06:17:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:15,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031157990] [2020-08-22 06:17:15,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:15,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:15,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331169752] [2020-08-22 06:17:15,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:15,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:15,165 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-22 06:17:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:15,387 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-22 06:17:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:15,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 06:17:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:15,413 INFO L225 Difference]: With dead ends: 13708 [2020-08-22 06:17:15,414 INFO L226 Difference]: Without dead ends: 13706 [2020-08-22 06:17:15,419 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 [2020-08-22 06:17:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-22 06:17:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-22 06:17:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-22 06:17:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-22 06:17:15,665 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-22 06:17:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:15,665 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-22 06:17:15,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-22 06:17:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 06:17:15,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:15,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:15,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 06:17:15,686 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-22 06:17:15,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:15,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230142590] [2020-08-22 06:17:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:15,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230142590] [2020-08-22 06:17:15,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:15,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:15,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657057362] [2020-08-22 06:17:15,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:15,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:15,712 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-22 06:17:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:16,046 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-22 06:17:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:16,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 06:17:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:16,086 INFO L225 Difference]: With dead ends: 27788 [2020-08-22 06:17:16,087 INFO L226 Difference]: Without dead ends: 15754 [2020-08-22 06:17:16,116 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 [2020-08-22 06:17:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-22 06:17:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-22 06:17:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-22 06:17:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-22 06:17:16,676 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-22 06:17:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:16,676 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-22 06:17:16,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-22 06:17:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 06:17:16,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:16,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:16,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 06:17:16,694 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-22 06:17:16,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:16,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101177098] [2020-08-22 06:17:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:16,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:16,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101177098] [2020-08-22 06:17:16,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:16,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:16,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458566671] [2020-08-22 06:17:16,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:16,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:16,730 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-22 06:17:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:16,910 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-22 06:17:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:16,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 06:17:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:16,939 INFO L225 Difference]: With dead ends: 23820 [2020-08-22 06:17:16,939 INFO L226 Difference]: Without dead ends: 16138 [2020-08-22 06:17:16,956 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 [2020-08-22 06:17:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-22 06:17:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-22 06:17:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-22 06:17:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-22 06:17:17,240 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-22 06:17:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:17,240 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-22 06:17:17,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-22 06:17:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 06:17:17,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:17,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:17,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 06:17:17,259 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:17,260 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-22 06:17:17,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:17,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834375285] [2020-08-22 06:17:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:17,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834375285] [2020-08-22 06:17:17,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:17,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:17,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528009124] [2020-08-22 06:17:17,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:17,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:17,282 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-22 06:17:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:17,984 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-22 06:17:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:17,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 06:17:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,029 INFO L225 Difference]: With dead ends: 26636 [2020-08-22 06:17:18,029 INFO L226 Difference]: Without dead ends: 26634 [2020-08-22 06:17:18,035 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 [2020-08-22 06:17:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-22 06:17:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-22 06:17:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-22 06:17:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-22 06:17:18,542 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-22 06:17:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,542 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-22 06:17:18,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-22 06:17:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 06:17:18,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 06:17:18,583 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-22 06:17:18,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312492913] [2020-08-22 06:17:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312492913] [2020-08-22 06:17:18,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273992922] [2020-08-22 06:17:18,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,611 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-22 06:17:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,940 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-22 06:17:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 06:17:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,994 INFO L225 Difference]: With dead ends: 55308 [2020-08-22 06:17:18,995 INFO L226 Difference]: Without dead ends: 31242 [2020-08-22 06:17:19,054 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 [2020-08-22 06:17:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-22 06:17:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-22 06:17:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-22 06:17:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-22 06:17:19,835 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-22 06:17:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,835 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-22 06:17:19,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-22 06:17:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 06:17:19,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 06:17:19,871 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-22 06:17:19,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712216479] [2020-08-22 06:17:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712216479] [2020-08-22 06:17:19,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129090825] [2020-08-22 06:17:19,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,914 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-22 06:17:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:20,248 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-22 06:17:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:20,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 06:17:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:20,297 INFO L225 Difference]: With dead ends: 46860 [2020-08-22 06:17:20,298 INFO L226 Difference]: Without dead ends: 31754 [2020-08-22 06:17:20,332 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 [2020-08-22 06:17:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-22 06:17:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-22 06:17:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-22 06:17:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-22 06:17:20,993 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-22 06:17:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:20,994 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-22 06:17:20,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-22 06:17:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 06:17:21,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:21,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:21,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 06:17:21,017 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-22 06:17:21,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:21,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074761274] [2020-08-22 06:17:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:21,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:21,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074761274] [2020-08-22 06:17:21,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:21,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:21,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760578683] [2020-08-22 06:17:21,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:21,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:21,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:21,045 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-22 06:17:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:21,517 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-22 06:17:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:21,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 06:17:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:21,579 INFO L225 Difference]: With dead ends: 51210 [2020-08-22 06:17:21,580 INFO L226 Difference]: Without dead ends: 51208 [2020-08-22 06:17:21,597 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 [2020-08-22 06:17:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-22 06:17:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-22 06:17:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-22 06:17:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-22 06:17:22,520 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-22 06:17:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:22,520 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-22 06:17:22,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-22 06:17:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 06:17:22,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:22,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:22,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 06:17:22,554 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-22 06:17:22,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:22,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988351292] [2020-08-22 06:17:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:22,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:22,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988351292] [2020-08-22 06:17:22,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:22,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:22,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549472317] [2020-08-22 06:17:22,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:22,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:22,579 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-22 06:17:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:23,091 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-22 06:17:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:23,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 06:17:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:23,092 INFO L225 Difference]: With dead ends: 109576 [2020-08-22 06:17:23,092 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:17:24,230 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 [2020-08-22 06:17:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:17:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:17:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:17:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:17:24,231 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-22 06:17:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:24,231 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:17:24,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:17:24,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:17:24,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 06:17:24,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:17:24,264 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 06:17:24,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:24,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:24,264 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 06:17:24,264 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 06:17:24,264 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 06:17:24,264 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,265 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,266 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-22 06:17:24,267 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,267 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,268 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-22 06:17:24,269 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,271 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,272 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-22 06:17:24,272 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-22 06:17:24,272 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,272 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 06:17:24,272 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-22 06:17:24,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:17:24 BoogieIcfgContainer [2020-08-22 06:17:24,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:17:24,292 INFO L168 Benchmark]: Toolchain (without parser) took 14164.66 ms. Allocated memory was 140.5 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 104.0 MB in the beginning and 992.6 MB in the end (delta: -888.6 MB). Peak memory consumption was 155.8 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,297 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.90 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,299 INFO L168 Benchmark]: Boogie Preprocessor took 116.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 180.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,300 INFO L168 Benchmark]: RCFGBuilder took 362.74 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 160.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,301 INFO L168 Benchmark]: TraceAbstraction took 13426.85 ms. Allocated memory was 203.4 MB in the beginning and 1.2 GB in the end (delta: 981.5 MB). Free memory was 160.2 MB in the beginning and 992.6 MB in the end (delta: -832.4 MB). Peak memory consumption was 149.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:24,304 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.90 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 180.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.74 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 160.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13426.85 ms. Allocated memory was 203.4 MB in the beginning and 1.2 GB in the end (delta: 981.5 MB). Free memory was 160.2 MB in the beginning and 992.6 MB in the end (delta: -832.4 MB). Peak memory consumption was 149.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 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...