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/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:26,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:26,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:26,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:26,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:26,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:26,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:26,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:26,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:26,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:26,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:26,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:26,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:26,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:26,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:26,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:26,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:26,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:26,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:26,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:26,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:26,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:26,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:26,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:26,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:15:26,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:26,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:26,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:26,937 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 [2019-10-13 19:15:26,957 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:26,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:26,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:26,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:26,960 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:26,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:26,960 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:26,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:26,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:26,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:26,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:26,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:26,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:26,963 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:26,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:26,963 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:26,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:26,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:26,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:26,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:26,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:26,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:26,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:26,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:26,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:26,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:26,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:26,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:26,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:27,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:27,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:27,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:27,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:27,301 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:27,301 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-13 19:15:27,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef266b6b2/eb92bcb4fe5f48fc93eb72e6a7964e27/FLAGfa26ffcfb [2019-10-13 19:15:27,812 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:27,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2019-10-13 19:15:27,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef266b6b2/eb92bcb4fe5f48fc93eb72e6a7964e27/FLAGfa26ffcfb [2019-10-13 19:15:28,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef266b6b2/eb92bcb4fe5f48fc93eb72e6a7964e27 [2019-10-13 19:15:28,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:28,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:28,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:28,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:28,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:28,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a94e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28, skipping insertion in model container [2019-10-13 19:15:28,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,217 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:28,234 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:28,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:28,403 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:28,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:28,445 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:28,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28 WrapperNode [2019-10-13 19:15:28,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:28,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:28,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:28,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:28,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (1/1) ... [2019-10-13 19:15:28,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:28,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:28,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:28,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:28,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (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 [2019-10-13 19:15:28,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:28,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:28,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:28,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:15:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:15:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:15:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:15:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:15:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:28,857 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:28,857 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:15:28,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28 BoogieIcfgContainer [2019-10-13 19:15:28,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:28,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:28,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:28,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:28" (1/3) ... [2019-10-13 19:15:28,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c1f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2019-10-13 19:15:28,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:28" (2/3) ... [2019-10-13 19:15:28,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c1f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:28, skipping insertion in model container [2019-10-13 19:15:28,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:28" (3/3) ... [2019-10-13 19:15:28,890 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2019-10-13 19:15:28,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:28,932 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:28,956 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:28,984 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:28,984 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:28,984 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:28,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:28,985 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:28,985 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:28,985 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:28,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 19:15:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:29,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,016 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,018 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1378298279, now seen corresponding path program 1 times [2019-10-13 19:15:29,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392993358] [2019-10-13 19:15:29,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:29,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392993358] [2019-10-13 19:15:29,239 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:29,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:15:29,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49745572] [2019-10-13 19:15:29,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:15:29,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:15:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:29,271 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-13 19:15:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:29,381 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-13 19:15:29,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:15:29,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 19:15:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:29,394 INFO L225 Difference]: With dead ends: 41 [2019-10-13 19:15:29,395 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 19:15:29,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 19:15:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 19:15:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 19:15:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-13 19:15:29,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-10-13 19:15:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:29,454 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-13 19:15:29,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:15:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-13 19:15:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:29,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,456 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,457 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1297975765, now seen corresponding path program 1 times [2019-10-13 19:15:29,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562748394] [2019-10-13 19:15:29,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:29,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562748394] [2019-10-13 19:15:29,602 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:29,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:15:29,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799649939] [2019-10-13 19:15:29,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:15:29,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:15:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:29,605 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-10-13 19:15:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:29,767 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-13 19:15:29,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:15:29,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-13 19:15:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:29,770 INFO L225 Difference]: With dead ends: 27 [2019-10-13 19:15:29,770 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:15:29,771 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:15:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-13 19:15:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:15:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 19:15:29,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-13 19:15:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:29,787 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 19:15:29,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:15:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 19:15:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:29,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:29,789 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:29,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1296128723, now seen corresponding path program 1 times [2019-10-13 19:15:29,792 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:29,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507064776] [2019-10-13 19:15:29,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:29,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:29,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507064776] [2019-10-13 19:15:29,899 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:29,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:15:29,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562045021] [2019-10-13 19:15:29,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:15:29,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:15:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:29,905 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-10-13 19:15:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:29,977 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-10-13 19:15:29,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:29,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 19:15:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:29,983 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:15:29,983 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:15:29,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:15:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:15:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-10-13 19:15:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:15:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-13 19:15:30,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2019-10-13 19:15:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:30,005 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-13 19:15:30,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:15:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-13 19:15:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:15:30,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:30,007 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:30,007 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:30,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:30,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1388961987, now seen corresponding path program 1 times [2019-10-13 19:15:30,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:30,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116062336] [2019-10-13 19:15:30,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116062336] [2019-10-13 19:15:30,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318538070] [2019-10-13 19:15:30,156 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 [2019-10-13 19:15:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:15:30,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:30,311 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 19:15:30,312 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:15:30,315 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:15:30,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:15:30,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-13 19:15:30,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:15:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:30,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-10-13 19:15:30,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067738524] [2019-10-13 19:15:30,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:15:30,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:15:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:30,379 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 9 states. [2019-10-13 19:15:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:30,555 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-13 19:15:30,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:30,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-13 19:15:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:30,557 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:15:30,557 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:15:30,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:15:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:15:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2019-10-13 19:15:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:15:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-13 19:15:30,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2019-10-13 19:15:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:30,567 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-13 19:15:30,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:15:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-13 19:15:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:15:30,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:30,568 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:30,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:30,774 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:30,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 28174125, now seen corresponding path program 2 times [2019-10-13 19:15:30,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:30,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664404549] [2019-10-13 19:15:30,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:30,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664404549] [2019-10-13 19:15:30,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166822992] [2019-10-13 19:15:30,909 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 [2019-10-13 19:15:30,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:30,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:30,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:15:30,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:30,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:30,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 19:15:30,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520695451] [2019-10-13 19:15:30,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:15:30,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:15:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:30,987 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-10-13 19:15:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:31,143 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2019-10-13 19:15:31,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:15:31,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-13 19:15:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:31,145 INFO L225 Difference]: With dead ends: 62 [2019-10-13 19:15:31,145 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:15:31,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:15:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2019-10-13 19:15:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:15:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-13 19:15:31,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2019-10-13 19:15:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:31,154 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-13 19:15:31,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:15:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-13 19:15:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:15:31,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:31,155 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:31,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:31,356 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1009720637, now seen corresponding path program 3 times [2019-10-13 19:15:31,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:31,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091537001] [2019-10-13 19:15:31,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:31,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:31,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091537001] [2019-10-13 19:15:31,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270240261] [2019-10-13 19:15:31,475 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 [2019-10-13 19:15:31,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:15:31,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:31,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:15:31,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:31,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:31,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 19:15:31,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988520195] [2019-10-13 19:15:31,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:15:31,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:15:31,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:31,557 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-10-13 19:15:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:31,789 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-10-13 19:15:31,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:15:31,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-13 19:15:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:31,791 INFO L225 Difference]: With dead ends: 69 [2019-10-13 19:15:31,791 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 19:15:31,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 19:15:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-10-13 19:15:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:15:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-13 19:15:31,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2019-10-13 19:15:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:31,802 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-13 19:15:31,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:15:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-13 19:15:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:15:31,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:31,807 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:32,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:32,010 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:32,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1372891437, now seen corresponding path program 4 times [2019-10-13 19:15:32,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:32,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654570653] [2019-10-13 19:15:32,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:32,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654570653] [2019-10-13 19:15:32,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640578644] [2019-10-13 19:15:32,167 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 [2019-10-13 19:15:32,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:32,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:32,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:15:32,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:32,237 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:32,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 19:15:32,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131436008] [2019-10-13 19:15:32,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:15:32,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:15:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:32,239 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-10-13 19:15:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:32,480 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2019-10-13 19:15:32,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:15:32,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-13 19:15:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:32,482 INFO L225 Difference]: With dead ends: 76 [2019-10-13 19:15:32,482 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 19:15:32,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 19:15:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2019-10-13 19:15:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:15:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-13 19:15:32,491 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2019-10-13 19:15:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:32,492 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-13 19:15:32,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:15:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-13 19:15:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:15:32,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:32,493 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:32,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:32,702 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash -253715651, now seen corresponding path program 5 times [2019-10-13 19:15:32,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:32,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033406753] [2019-10-13 19:15:32,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:32,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:32,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033406753] [2019-10-13 19:15:32,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872889366] [2019-10-13 19:15:32,863 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 [2019-10-13 19:15:33,100 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:15:33,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:33,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:15:33,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:33,131 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:33,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 19:15:33,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285380592] [2019-10-13 19:15:33,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:15:33,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:15:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:33,136 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2019-10-13 19:15:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:33,436 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2019-10-13 19:15:33,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:15:33,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-10-13 19:15:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:33,438 INFO L225 Difference]: With dead ends: 83 [2019-10-13 19:15:33,438 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 19:15:33,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:15:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 19:15:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 30. [2019-10-13 19:15:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:15:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-13 19:15:33,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2019-10-13 19:15:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:33,448 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-13 19:15:33,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:15:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-13 19:15:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:15:33,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:33,449 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:33,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:33,655 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:33,655 INFO L82 PathProgramCache]: Analyzing trace with hash 861072173, now seen corresponding path program 6 times [2019-10-13 19:15:33,656 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:33,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671946205] [2019-10-13 19:15:33,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:33,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:33,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:33,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671946205] [2019-10-13 19:15:33,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685778483] [2019-10-13 19:15:33,799 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 [2019-10-13 19:15:33,893 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 19:15:33,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:33,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:15:33,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:33,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:33,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 19:15:33,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47303337] [2019-10-13 19:15:33,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:15:33,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:15:33,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:15:33,928 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2019-10-13 19:15:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:34,287 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2019-10-13 19:15:34,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:15:34,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-10-13 19:15:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:34,289 INFO L225 Difference]: With dead ends: 90 [2019-10-13 19:15:34,289 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 19:15:34,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:15:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 19:15:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2019-10-13 19:15:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:15:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-13 19:15:34,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2019-10-13 19:15:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:34,298 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-13 19:15:34,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:15:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-13 19:15:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:15:34,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:34,300 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:34,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:34,503 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1059756349, now seen corresponding path program 7 times [2019-10-13 19:15:34,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:34,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118762408] [2019-10-13 19:15:34,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:34,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:34,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:34,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118762408] [2019-10-13 19:15:34,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755768029] [2019-10-13 19:15:34,673 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:34,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:15:34,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:34,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:34,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 19:15:34,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310548374] [2019-10-13 19:15:34,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:15:34,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:34,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:15:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:15:34,745 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2019-10-13 19:15:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:35,199 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2019-10-13 19:15:35,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:15:35,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-10-13 19:15:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:35,201 INFO L225 Difference]: With dead ends: 97 [2019-10-13 19:15:35,201 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 19:15:35,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:15:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 19:15:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2019-10-13 19:15:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:15:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-13 19:15:35,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2019-10-13 19:15:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:35,211 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-13 19:15:35,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:15:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-13 19:15:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:15:35,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:35,212 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:35,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:35,420 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1370968787, now seen corresponding path program 8 times [2019-10-13 19:15:35,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:35,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473630888] [2019-10-13 19:15:35,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:35,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:35,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:35,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473630888] [2019-10-13 19:15:35,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309241344] [2019-10-13 19:15:35,579 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 [2019-10-13 19:15:35,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:35,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:35,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:15:35,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:35,679 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:35,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 19:15:35,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185480199] [2019-10-13 19:15:35,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:15:35,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:35,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:15:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:15:35,681 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2019-10-13 19:15:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:36,186 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2019-10-13 19:15:36,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:15:36,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-10-13 19:15:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:36,189 INFO L225 Difference]: With dead ends: 104 [2019-10-13 19:15:36,189 INFO L226 Difference]: Without dead ends: 87 [2019-10-13 19:15:36,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:15:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-13 19:15:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 33. [2019-10-13 19:15:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:15:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-13 19:15:36,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-10-13 19:15:36,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:36,202 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-13 19:15:36,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:15:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-13 19:15:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:15:36,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:36,203 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:36,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:36,407 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash 585963325, now seen corresponding path program 9 times [2019-10-13 19:15:36,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:36,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208660363] [2019-10-13 19:15:36,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:36,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:36,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:36,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208660363] [2019-10-13 19:15:36,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131439252] [2019-10-13 19:15:36,627 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 [2019-10-13 19:15:37,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:15:37,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:37,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:15:37,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:37,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:37,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 19:15:37,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014029211] [2019-10-13 19:15:37,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:15:37,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:15:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:37,244 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2019-10-13 19:15:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:37,779 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2019-10-13 19:15:37,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:15:37,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2019-10-13 19:15:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:37,781 INFO L225 Difference]: With dead ends: 111 [2019-10-13 19:15:37,781 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 19:15:37,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:15:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 19:15:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 34. [2019-10-13 19:15:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:15:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-13 19:15:37,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2019-10-13 19:15:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:37,790 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-13 19:15:37,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:15:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-13 19:15:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:15:37,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:37,791 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:37,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:37,996 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1121316653, now seen corresponding path program 10 times [2019-10-13 19:15:37,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:37,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698800695] [2019-10-13 19:15:37,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:37,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:37,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:38,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698800695] [2019-10-13 19:15:38,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226485164] [2019-10-13 19:15:38,252 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 [2019-10-13 19:15:38,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:38,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:38,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:15:38,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:38,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:38,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 19:15:38,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41779352] [2019-10-13 19:15:38,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:15:38,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:38,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:15:38,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:38,356 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2019-10-13 19:15:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:39,067 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2019-10-13 19:15:39,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:15:39,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2019-10-13 19:15:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:39,068 INFO L225 Difference]: With dead ends: 118 [2019-10-13 19:15:39,068 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 19:15:39,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:15:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 19:15:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 35. [2019-10-13 19:15:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:15:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-13 19:15:39,076 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2019-10-13 19:15:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:39,076 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-13 19:15:39,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:15:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-13 19:15:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:15:39,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:39,077 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:39,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:39,281 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash 537400637, now seen corresponding path program 11 times [2019-10-13 19:15:39,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:39,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696119153] [2019-10-13 19:15:39,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:39,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:39,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696119153] [2019-10-13 19:15:39,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916773440] [2019-10-13 19:15:39,480 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