/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:25,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:25,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:25,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:25,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:25,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:25,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:25,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:25,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:25,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:25,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:25,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:25,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:25,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:25,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:25,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:25,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:25,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:25,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:25,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:25,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:25,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:25,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:25,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:25,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:12:25,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:25,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:25,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:25,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:12:26,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:26,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:26,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:26,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:26,020 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:26,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:26,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:26,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:26,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:26,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:26,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:26,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:26,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:26,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:26,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:26,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:26,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:26,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:26,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:26,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:26,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:26,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:26,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:26,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:26,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:26,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:26,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:26,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:26,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:26,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:26,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:26,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:26,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:26,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:26,319 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:26,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-07-07 11:12:26,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b2544145/7f9b31ecc66741839d8bdd2d7db55710/FLAGb9c986129 [2020-07-07 11:12:26,823 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:26,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-07-07 11:12:26,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b2544145/7f9b31ecc66741839d8bdd2d7db55710/FLAGb9c986129 [2020-07-07 11:12:27,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b2544145/7f9b31ecc66741839d8bdd2d7db55710 [2020-07-07 11:12:27,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:27,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:27,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:27,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:27,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:27,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba561d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27, skipping insertion in model container [2020-07-07 11:12:27,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:27,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:27,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:27,499 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:27,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:27,530 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:27,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27 WrapperNode [2020-07-07 11:12:27,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:27,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:27,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:27,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:27,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... [2020-07-07 11:12:27,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:27,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:27,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:27,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:27,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-07 11:12:27,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:27,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:27,702 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:27,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:12:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:27,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:27,862 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:27,862 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:27,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:27 BoogieIcfgContainer [2020-07-07 11:12:27,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:27,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:27,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:27,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:27,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:27" (1/3) ... [2020-07-07 11:12:27,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39aadc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:27, skipping insertion in model container [2020-07-07 11:12:27,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:27" (2/3) ... [2020-07-07 11:12:27,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39aadc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:27, skipping insertion in model container [2020-07-07 11:12:27,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:27" (3/3) ... [2020-07-07 11:12:27,873 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-07-07 11:12:27,881 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:27,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:27,900 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:27,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:27,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:27,922 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:27,922 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:27,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:27,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:27,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:27,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:12:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:27,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:27,945 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-07 11:12:27,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:27,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729137735] [2020-07-07 11:12:27,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:28,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729137735] [2020-07-07 11:12:28,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:28,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:28,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881000660] [2020-07-07 11:12:28,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:28,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:28,238 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:12:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:28,323 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:12:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:28,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:28,337 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:12:28,337 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:12:28,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:12:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:12:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:12:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:12:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:12:28,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:12:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:28,382 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:12:28,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:12:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:12:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:28,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:28,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:28,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-07 11:12:28,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:28,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671596613] [2020-07-07 11:12:28,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:28,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671596613] [2020-07-07 11:12:28,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546782901] [2020-07-07 11:12:28,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:12:28,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:28,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:28,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-07 11:12:28,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139530005] [2020-07-07 11:12:28,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:12:28,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:12:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:12:28,645 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-07 11:12:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:28,702 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:12:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:12:28,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-07 11:12:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:28,704 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:12:28,704 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:12:28,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:12:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:12:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:12:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:12:28,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:12:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:28,713 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:12:28,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:12:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:12:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:12:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:28,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:28,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:12:28,930 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-07 11:12:28,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:28,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496712998] [2020-07-07 11:12:28,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:29,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496712998] [2020-07-07 11:12:29,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47663907] [2020-07-07 11:12:29,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:29,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:29,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:29,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:12:29,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:29,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:29,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-07 11:12:29,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364425630] [2020-07-07 11:12:29,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:12:29,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:12:29,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:12:29,189 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-07 11:12:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:29,280 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:12:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:12:29,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-07 11:12:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:29,284 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:12:29,284 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:12:29,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:12:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:12:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:12:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:12:29,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:12:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:29,301 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:12:29,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:12:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:12:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:12:29,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:29,304 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:29,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:29,520 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-07 11:12:29,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:29,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603775032] [2020-07-07 11:12:29,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:29,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603775032] [2020-07-07 11:12:29,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130042152] [2020-07-07 11:12:29,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:29,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:12:29,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:29,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:12:29,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:29,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:29,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-07-07 11:12:29,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655358015] [2020-07-07 11:12:29,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:12:29,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:12:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:12:29,892 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-07-07 11:12:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:30,070 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:12:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:12:30,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-07-07 11:12:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:30,072 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:30,072 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:30,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:12:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:12:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:12:30,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:12:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:30,080 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:12:30,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:12:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:12:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:12:30,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:30,081 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:30,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-07 11:12:30,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:30,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784485195] [2020-07-07 11:12:30,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:30,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784485195] [2020-07-07 11:12:30,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816583120] [2020-07-07 11:12:30,464 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,493 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:30,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:30,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:12:30,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:30,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:30,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-07 11:12:30,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054261847] [2020-07-07 11:12:30,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:12:30,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:12:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:30,562 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-07 11:12:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:30,648 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:12:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:12:30,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-07 11:12:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:30,650 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:12:30,650 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:12:30,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:12:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:12:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:12:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:12:30,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:12:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:30,658 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:12:30,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:12:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:12:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:12:30,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:30,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:30,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,875 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-07 11:12:30,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:30,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713893486] [2020-07-07 11:12:30,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:31,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713893486] [2020-07-07 11:12:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227943646] [2020-07-07 11:12:31,086 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:31,122 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:12:31,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:31,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:12:31,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:31,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:31,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-07-07 11:12:31,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952264888] [2020-07-07 11:12:31,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:12:31,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:12:31,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:12:31,306 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-07-07 11:12:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:31,535 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:12:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:12:31,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-07-07 11:12:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:31,537 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:12:31,537 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:12:31,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:12:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:12:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:12:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:12:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:12:31,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:12:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:31,545 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:12:31,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:12:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:12:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:12:31,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:31,547 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:31,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:12:31,761 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-07 11:12:31,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:31,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103534804] [2020-07-07 11:12:31,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:31,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103534804] [2020-07-07 11:12:31,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074192761] [2020-07-07 11:12:31,985 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:32,043 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:12:32,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:32,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:12:32,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:32,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:32,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-07 11:12:32,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514528630] [2020-07-07 11:12:32,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:12:32,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:12:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:12:32,128 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-07 11:12:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:32,234 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:12:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:12:32,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-07 11:12:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:32,237 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:12:32,237 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:12:32,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:12:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:12:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:12:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:12:32,250 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:12:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:32,251 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:12:32,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:12:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:12:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:12:32,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:32,255 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:32,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:32,475 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-07 11:12:32,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:32,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040414439] [2020-07-07 11:12:32,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:32,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040414439] [2020-07-07 11:12:32,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530370922] [2020-07-07 11:12:32,707 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-07 11:12:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:32,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:12:32,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:32,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:32,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-07 11:12:32,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928610174] [2020-07-07 11:12:32,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:12:32,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:12:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:32,804 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-07 11:12:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:32,924 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:12:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:12:32,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-07 11:12:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:32,926 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:12:32,926 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:12:32,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:12:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:12:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:12:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:12:32,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:12:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:32,934 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:12:32,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:12:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:12:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:12:32,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:32,936 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:33,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:33,150 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-07 11:12:33,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:33,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602653725] [2020-07-07 11:12:33,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:33,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602653725] [2020-07-07 11:12:33,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419231460] [2020-07-07 11:12:33,377 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:33,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:33,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:33,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:12:33,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:33,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:33,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-07 11:12:33,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942822833] [2020-07-07 11:12:33,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:12:33,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:12:33,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:12:33,468 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-07 11:12:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:33,604 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:12:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:12:33,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-07 11:12:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:33,606 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:12:33,606 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:12:33,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:12:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:12:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:12:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:12:33,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:12:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:33,620 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:12:33,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:12:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:12:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:12:33,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:33,622 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:33,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:12:33,834 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:33,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-07 11:12:33,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:33,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817960306] [2020-07-07 11:12:33,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:34,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817960306] [2020-07-07 11:12:34,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479130300] [2020-07-07 11:12:34,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:34,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:12:34,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:34,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:12:34,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:34,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:34,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-07-07 11:12:34,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8613870] [2020-07-07 11:12:34,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 11:12:34,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 11:12:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:12:34,534 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-07-07 11:12:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:35,039 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:12:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:12:35,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-07-07 11:12:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:35,041 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:12:35,041 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:12:35,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-07-07 11:12:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:12:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:12:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:12:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:12:35,049 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:12:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:35,050 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:12:35,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 11:12:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:12:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:12:35,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:35,051 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:35,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:35,252 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-07 11:12:35,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:35,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788055333] [2020-07-07 11:12:35,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:12:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788055333] [2020-07-07 11:12:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999227733] [2020-07-07 11:12:35,582 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:35,643 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:35,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:35,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-07 11:12:35,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:12:35,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:35,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-07 11:12:35,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231017790] [2020-07-07 11:12:35,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:12:35,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:12:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:12:35,731 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-07 11:12:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:35,903 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-07 11:12:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:12:35,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-07 11:12:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:35,905 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:12:35,905 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:12:35,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:12:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:12:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 11:12:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:12:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-07 11:12:35,923 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-07 11:12:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:35,924 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-07 11:12:35,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:12:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-07 11:12:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:12:35,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:35,926 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:36,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:36,140 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:36,140 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-07 11:12:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:36,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494761914] [2020-07-07 11:12:36,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:12:36,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494761914] [2020-07-07 11:12:36,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109098927] [2020-07-07 11:12:36,540 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:36,589 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:12:36,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:36,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:12:36,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:12:36,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:36,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-07 11:12:36,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862814072] [2020-07-07 11:12:36,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:12:36,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:12:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:36,647 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-07 11:12:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:36,843 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 11:12:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:12:36,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-07 11:12:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:36,845 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:12:36,845 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 11:12:36,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:12:36,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 11:12:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-07 11:12:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:12:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:12:36,858 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-07 11:12:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:36,859 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:12:36,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:12:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:12:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:12:36,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:36,863 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:37,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:12:37,064 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-07 11:12:37,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:37,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631061033] [2020-07-07 11:12:37,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:12:37,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631061033] [2020-07-07 11:12:37,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151116686] [2020-07-07 11:12:37,506 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:37,576 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:12:37,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:37,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-07 11:12:37,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:12:38,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:38,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2020-07-07 11:12:38,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409455168] [2020-07-07 11:12:38,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-07 11:12:38,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-07 11:12:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 11:12:38,364 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 44 states. [2020-07-07 11:12:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:39,032 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-07 11:12:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 11:12:39,032 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 85 [2020-07-07 11:12:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:39,033 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:12:39,034 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:12:39,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 11:12:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:12:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-07 11:12:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:12:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 11:12:39,048 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-07 11:12:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:39,049 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 11:12:39,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-07 11:12:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 11:12:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:12:39,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:39,051 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:39,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:12:39,257 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-07 11:12:39,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:39,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759069666] [2020-07-07 11:12:39,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:12:39,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759069666] [2020-07-07 11:12:39,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118240006] [2020-07-07 11:12:39,707 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:12:39,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:12:39,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:39,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-07 11:12:39,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738022279] [2020-07-07 11:12:39,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:12:39,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:39,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:12:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:39,834 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-07 11:12:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:40,017 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-07 11:12:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:12:40,018 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-07 11:12:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:40,019 INFO L225 Difference]: With dead ends: 61 [2020-07-07 11:12:40,019 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:12:40,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:12:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:12:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-07 11:12:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:12:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:12:40,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-07 11:12:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:40,026 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:12:40,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:12:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:12:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 11:12:40,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:40,028 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:40,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:12:40,229 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-07 11:12:40,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:40,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662964950] [2020-07-07 11:12:40,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:12:40,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662964950] [2020-07-07 11:12:40,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516589897] [2020-07-07 11:12:40,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:40,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:40,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:40,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 11:12:40,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:12:40,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:40,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-07 11:12:40,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484982387] [2020-07-07 11:12:40,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:12:40,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:12:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:12:40,829 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-07 11:12:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:41,036 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 11:12:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:12:41,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-07 11:12:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:41,038 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:12:41,038 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:12:41,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 11:12:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:12:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-07 11:12:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:12:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 11:12:41,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-07 11:12:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:41,045 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 11:12:41,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:12:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 11:12:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 11:12:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:41,046 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:41,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:41,260 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-07 11:12:41,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:41,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469383805] [2020-07-07 11:12:41,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:12:41,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469383805] [2020-07-07 11:12:41,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876098215] [2020-07-07 11:12:41,745 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:41,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:12:41,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:41,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-07 11:12:41,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:12:41,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:41,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-07 11:12:41,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114905761] [2020-07-07 11:12:41,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:12:41,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:12:41,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:41,882 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-07 11:12:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:42,129 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-07 11:12:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:12:42,130 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-07 11:12:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:42,131 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:12:42,131 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:12:42,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 11:12:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:12:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-07 11:12:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:12:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-07 11:12:42,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-07 11:12:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:42,138 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-07 11:12:42,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:12:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-07 11:12:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:12:42,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:42,139 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:42,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 11:12:42,353 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-07 11:12:42,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:42,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604442920] [2020-07-07 11:12:42,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:12:42,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604442920] [2020-07-07 11:12:42,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986827512] [2020-07-07 11:12:42,869 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:42,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:42,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:42,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:12:42,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:12:42,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:42,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-07 11:12:42,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099606696] [2020-07-07 11:12:42,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:12:42,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:12:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:12:42,980 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-07 11:12:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:43,235 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-07 11:12:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:12:43,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-07 11:12:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:43,237 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:12:43,237 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:12:43,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 11:12:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:12:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:12:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:12:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-07 11:12:43,243 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-07 11:12:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:43,243 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-07 11:12:43,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:12:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-07 11:12:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 11:12:43,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:43,245 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:43,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 11:12:43,458 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-07 11:12:43,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:43,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312985570] [2020-07-07 11:12:43,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:12:44,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312985570] [2020-07-07 11:12:44,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282292542] [2020-07-07 11:12:44,084 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:44,144 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:12:44,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:44,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-07 11:12:44,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:12:45,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:45,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2020-07-07 11:12:45,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163420265] [2020-07-07 11:12:45,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-07 11:12:45,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-07 11:12:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 11:12:45,182 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2020-07-07 11:12:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:46,364 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-07 11:12:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 11:12:46,364 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2020-07-07 11:12:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:46,365 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:12:46,365 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:12:46,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2020-07-07 11:12:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:12:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-07 11:12:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 11:12:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-07 11:12:46,373 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-07 11:12:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:46,374 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-07 11:12:46,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-07 11:12:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-07 11:12:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:12:46,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:46,375 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:46,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 11:12:46,588 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-07 11:12:46,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:46,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220161165] [2020-07-07 11:12:46,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:12:47,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220161165] [2020-07-07 11:12:47,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775135736] [2020-07-07 11:12:47,546 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:47,627 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:12:47,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:47,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:12:47,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:12:48,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:48,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-07-07 11:12:48,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398267260] [2020-07-07 11:12:48,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-07-07 11:12:48,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-07-07 11:12:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-07-07 11:12:48,914 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2020-07-07 11:12:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:50,227 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-07 11:12:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-07 11:12:50,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2020-07-07 11:12:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:50,229 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:12:50,229 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 11:12:50,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 11:12:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 11:12:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-07 11:12:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 11:12:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-07 11:12:50,237 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-07 11:12:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:50,237 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-07 11:12:50,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-07-07 11:12:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-07 11:12:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 11:12:50,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:50,239 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:50,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:50,444 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-07 11:12:50,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:50,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295652688] [2020-07-07 11:12:50,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:12:51,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295652688] [2020-07-07 11:12:51,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155553231] [2020-07-07 11:12:51,359 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-07 11:12:51,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:12:51,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:51,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-07 11:12:51,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982614337] [2020-07-07 11:12:51,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 11:12:51,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:51,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 11:12:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-07 11:12:51,522 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-07 11:12:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:51,823 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-07 11:12:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:12:51,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-07 11:12:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:51,828 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:12:51,828 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:12:51,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 11:12:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:12:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-07 11:12:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 11:12:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-07 11:12:51,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-07 11:12:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:51,838 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-07 11:12:51,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 11:12:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-07 11:12:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-07 11:12:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:51,840 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:52,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:52,054 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-07 11:12:52,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:52,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615251267] [2020-07-07 11:12:52,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:52,124 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:12:52,124 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:12:52,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:12:52,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:52 BoogieIcfgContainer [2020-07-07 11:12:52,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:52,200 INFO L168 Benchmark]: Toolchain (without parser) took 24956.07 ms. Allocated memory was 138.9 MB in the beginning and 498.1 MB in the end (delta: 359.1 MB). Free memory was 103.9 MB in the beginning and 184.1 MB in the end (delta: -80.2 MB). Peak memory consumption was 279.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:52,201 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 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. [2020-07-07 11:12:52,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.89 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:52,206 INFO L168 Benchmark]: Boogie Preprocessor took 25.57 ms. Allocated memory is still 138.9 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:52,206 INFO L168 Benchmark]: RCFGBuilder took 309.33 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 170.4 MB in the end (delta: -77.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:52,207 INFO L168 Benchmark]: TraceAbstraction took 24330.09 ms. Allocated memory was 202.4 MB in the beginning and 498.1 MB in the end (delta: 295.7 MB). Free memory was 170.4 MB in the beginning and 184.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 282.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:52,211 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 138.9 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 285.89 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.57 ms. Allocated memory is still 138.9 MB. Free memory was 94.4 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.33 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 170.4 MB in the end (delta: -77.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24330.09 ms. Allocated memory was 202.4 MB in the beginning and 498.1 MB in the end (delta: 295.7 MB). Free memory was 170.4 MB in the beginning and 184.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 282.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 693 SDslu, 1928 SDs, 0 SdLazy, 1268 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2372 GetRequests, 1676 SyntacticMatches, 0 SemanticMatches, 696 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7454 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 578160 SizeOfPredicates, 158 NumberOfNonLiveVariables, 3268 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...