/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:06,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:12:06,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:12:06,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:12:06,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:06,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:06,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:06,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:06,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:06,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:06,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:06,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:06,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:06,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:06,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:06,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:06,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:06,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:06,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:06,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:06,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:06,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:06,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:06,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:06,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:12:06,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:12:06,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:12:06,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:12:06,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:12:06,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 05:12:06,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:06,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:06,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:06,810 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 [2020-08-19 05:12:06,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:06,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:06,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:06,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:06,857 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:06,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:06,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:06,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:06,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:06,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:06,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:06,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:06,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:06,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:06,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:06,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:06,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:06,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:06,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:06,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:06,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:06,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:06,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:06,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:06,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:06,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:06,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:06,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:06,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:06,863 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:07,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:07,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:07,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:07,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:07,176 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:07,177 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 05:12:07,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103c9881e/469a88cb1bd641419b7695dd8b66553b/FLAG31eb9e1f5 [2020-08-19 05:12:07,684 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:07,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 05:12:07,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103c9881e/469a88cb1bd641419b7695dd8b66553b/FLAG31eb9e1f5 [2020-08-19 05:12:08,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/103c9881e/469a88cb1bd641419b7695dd8b66553b [2020-08-19 05:12:08,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:08,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:08,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:08,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:08,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:08,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256ae262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08, skipping insertion in model container [2020-08-19 05:12:08,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:08,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:08,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:08,307 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:08,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:08,343 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:08,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08 WrapperNode [2020-08-19 05:12:08,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:08,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:08,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:08,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:08,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (1/1) ... [2020-08-19 05:12:08,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:08,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:08,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:08,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:08,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (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 [2020-08-19 05:12:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:08,740 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:08,741 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 05:12:08,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:08 BoogieIcfgContainer [2020-08-19 05:12:08,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:08,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:08,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:08,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:08,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:08" (1/3) ... [2020-08-19 05:12:08,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea2dcc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:08, skipping insertion in model container [2020-08-19 05:12:08,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:08" (2/3) ... [2020-08-19 05:12:08,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea2dcc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:08, skipping insertion in model container [2020-08-19 05:12:08,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:08" (3/3) ... [2020-08-19 05:12:08,758 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-19 05:12:08,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:08,808 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:08,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:08,867 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:08,867 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:08,867 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:08,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:08,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:08,868 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:08,868 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:08,868 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-19 05:12:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 05:12:08,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,894 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-19 05:12:08,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295393542] [2020-08-19 05:12:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295393542] [2020-08-19 05:12:09,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667688471] [2020-08-19 05:12:09,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,117 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-19 05:12:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,184 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-19 05:12:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 05:12:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,198 INFO L225 Difference]: With dead ends: 57 [2020-08-19 05:12:09,198 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 05:12:09,202 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 [2020-08-19 05:12:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 05:12:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-19 05:12:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 05:12:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-19 05:12:09,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-19 05:12:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,246 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-19 05:12:09,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-19 05:12:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 05:12:09,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:09,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-19 05:12:09,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665946726] [2020-08-19 05:12:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665946726] [2020-08-19 05:12:09,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398070981] [2020-08-19 05:12:09,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,303 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-19 05:12:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,331 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-19 05:12:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 05:12:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,333 INFO L225 Difference]: With dead ends: 67 [2020-08-19 05:12:09,333 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 05:12:09,334 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 [2020-08-19 05:12:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 05:12:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-19 05:12:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 05:12:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-19 05:12:09,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-19 05:12:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,344 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-19 05:12:09,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-19 05:12:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 05:12:09,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:09,346 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-19 05:12:09,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43096447] [2020-08-19 05:12:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43096447] [2020-08-19 05:12:09,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578579314] [2020-08-19 05:12:09,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,393 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-19 05:12:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,418 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-19 05:12:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 05:12:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,420 INFO L225 Difference]: With dead ends: 63 [2020-08-19 05:12:09,420 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 05:12:09,421 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 [2020-08-19 05:12:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 05:12:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-19 05:12:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 05:12:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-19 05:12:09,431 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-19 05:12:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,431 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-19 05:12:09,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-19 05:12:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 05:12:09,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:09,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-19 05:12:09,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179920102] [2020-08-19 05:12:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179920102] [2020-08-19 05:12:09,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101628735] [2020-08-19 05:12:09,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,479 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-19 05:12:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,511 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-19 05:12:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 05:12:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,514 INFO L225 Difference]: With dead ends: 76 [2020-08-19 05:12:09,514 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 05:12:09,515 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 [2020-08-19 05:12:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 05:12:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-19 05:12:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 05:12:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-19 05:12:09,526 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-19 05:12:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,526 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-19 05:12:09,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-19 05:12:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 05:12:09,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:09,529 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-19 05:12:09,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288675280] [2020-08-19 05:12:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288675280] [2020-08-19 05:12:09,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205214173] [2020-08-19 05:12:09,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,595 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-19 05:12:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,618 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-19 05:12:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 05:12:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,620 INFO L225 Difference]: With dead ends: 124 [2020-08-19 05:12:09,620 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 05:12:09,621 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 [2020-08-19 05:12:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 05:12:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-19 05:12:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 05:12:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-19 05:12:09,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-19 05:12:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,633 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-19 05:12:09,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-19 05:12:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:12:09,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:09,635 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-19 05:12:09,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863154461] [2020-08-19 05:12:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863154461] [2020-08-19 05:12:09,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945054998] [2020-08-19 05:12:09,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,675 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-19 05:12:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,713 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-19 05:12:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 05:12:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,717 INFO L225 Difference]: With dead ends: 111 [2020-08-19 05:12:09,718 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 05:12:09,718 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 [2020-08-19 05:12:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 05:12:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 05:12:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 05:12:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-19 05:12:09,733 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-19 05:12:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,735 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-19 05:12:09,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-19 05:12:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:12:09,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:09,737 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-19 05:12:09,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438422697] [2020-08-19 05:12:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438422697] [2020-08-19 05:12:09,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687830423] [2020-08-19 05:12:09,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,796 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-19 05:12:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,815 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-19 05:12:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 05:12:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,817 INFO L225 Difference]: With dead ends: 132 [2020-08-19 05:12:09,818 INFO L226 Difference]: Without dead ends: 130 [2020-08-19 05:12:09,818 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 [2020-08-19 05:12:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-19 05:12:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-19 05:12:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 05:12:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-19 05:12:09,834 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-19 05:12:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,835 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-19 05:12:09,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-19 05:12:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 05:12:09,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:09,837 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-19 05:12:09,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375226526] [2020-08-19 05:12:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375226526] [2020-08-19 05:12:09,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051584863] [2020-08-19 05:12:09,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,877 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-19 05:12:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,899 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-19 05:12:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 05:12:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,901 INFO L225 Difference]: With dead ends: 232 [2020-08-19 05:12:09,901 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 05:12:09,902 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 [2020-08-19 05:12:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 05:12:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 05:12:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 05:12:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-19 05:12:09,918 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-19 05:12:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:09,919 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-19 05:12:09,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-19 05:12:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:09,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:09,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:09,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:09,921 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-19 05:12:09,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:09,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915595006] [2020-08-19 05:12:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:09,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915595006] [2020-08-19 05:12:09,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:09,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:09,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248258845] [2020-08-19 05:12:09,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:09,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:09,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:09,972 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-19 05:12:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,991 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-19 05:12:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,992 INFO L225 Difference]: With dead ends: 204 [2020-08-19 05:12:09,993 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 05:12:09,994 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 [2020-08-19 05:12:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 05:12:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-19 05:12:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 05:12:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-19 05:12:10,006 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-19 05:12:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,007 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-19 05:12:10,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-19 05:12:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:10,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:12:10,008 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-19 05:12:10,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753957876] [2020-08-19 05:12:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753957876] [2020-08-19 05:12:10,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528235954] [2020-08-19 05:12:10,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,034 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-19 05:12:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,058 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-19 05:12:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,060 INFO L225 Difference]: With dead ends: 236 [2020-08-19 05:12:10,060 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 05:12:10,061 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 [2020-08-19 05:12:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 05:12:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-19 05:12:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 05:12:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-19 05:12:10,075 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-19 05:12:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,076 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-19 05:12:10,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-19 05:12:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 05:12:10,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:12:10,078 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-19 05:12:10,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537331632] [2020-08-19 05:12:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537331632] [2020-08-19 05:12:10,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293332176] [2020-08-19 05:12:10,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,105 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-19 05:12:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,148 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-19 05:12:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 05:12:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,154 INFO L225 Difference]: With dead ends: 444 [2020-08-19 05:12:10,154 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 05:12:10,155 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 [2020-08-19 05:12:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 05:12:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 05:12:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 05:12:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-19 05:12:10,170 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-19 05:12:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,170 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-19 05:12:10,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-19 05:12:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:10,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:12:10,172 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-19 05:12:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326688414] [2020-08-19 05:12:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326688414] [2020-08-19 05:12:10,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617166024] [2020-08-19 05:12:10,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,200 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-19 05:12:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,221 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-19 05:12:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,223 INFO L225 Difference]: With dead ends: 384 [2020-08-19 05:12:10,223 INFO L226 Difference]: Without dead ends: 266 [2020-08-19 05:12:10,224 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 [2020-08-19 05:12:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-19 05:12:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-19 05:12:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 05:12:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-19 05:12:10,236 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-19 05:12:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,237 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-19 05:12:10,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-19 05:12:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:10,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:12:10,239 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-19 05:12:10,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949344196] [2020-08-19 05:12:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949344196] [2020-08-19 05:12:10,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540535248] [2020-08-19 05:12:10,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,264 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-19 05:12:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,290 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-19 05:12:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,294 INFO L225 Difference]: With dead ends: 426 [2020-08-19 05:12:10,294 INFO L226 Difference]: Without dead ends: 424 [2020-08-19 05:12:10,294 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 [2020-08-19 05:12:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-19 05:12:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-19 05:12:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 05:12:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-19 05:12:10,308 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-19 05:12:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,308 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-19 05:12:10,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-19 05:12:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:12:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:12:10,310 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-19 05:12:10,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823813108] [2020-08-19 05:12:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823813108] [2020-08-19 05:12:10,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467944324] [2020-08-19 05:12:10,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,333 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-19 05:12:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,358 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-19 05:12:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 05:12:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,359 INFO L225 Difference]: With dead ends: 856 [2020-08-19 05:12:10,359 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:12:10,361 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 [2020-08-19 05:12:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:12:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:12:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:12:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:12:10,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-19 05:12:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,363 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:12:10,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:12:10,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:12:10,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:12:10,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:12:10,387 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,388 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,388 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,388 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,388 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-19 05:12:10,388 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,389 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-19 05:12:10,390 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-19 05:12:10,391 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-19 05:12:10,391 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,391 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-19 05:12:10,391 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-19 05:12:10,391 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-19 05:12:10,391 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-19 05:12:10,391 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 05:12:10,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:10 BoogieIcfgContainer [2020-08-19 05:12:10,403 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:10,406 INFO L168 Benchmark]: Toolchain (without parser) took 2322.48 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 103.4 MB in the beginning and 144.7 MB in the end (delta: -41.3 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,407 INFO L168 Benchmark]: CDTParser took 0.22 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. [2020-08-19 05:12:10,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.47 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,408 INFO L168 Benchmark]: Boogie Preprocessor took 125.04 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,409 INFO L168 Benchmark]: RCFGBuilder took 275.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,410 INFO L168 Benchmark]: TraceAbstraction took 1656.80 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.9 MB in the beginning and 144.7 MB in the end (delta: 22.2 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,414 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 260.47 ms. Allocated memory is still 140.5 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.04 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.13 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1656.80 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.9 MB in the beginning and 144.7 MB in the end (delta: 22.2 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...