/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:57,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:57,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:57,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:57,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:57,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:57,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:57,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:57,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:57,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:57,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:57,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:57,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:57,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:57,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:57,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:57,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:57,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:57,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:57,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:57,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:57,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:57,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:57,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:57,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:57,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:57,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:57,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:57,190 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 [2019-11-06 18:47:57,225 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:57,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:57,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:57,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:57,230 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:57,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:57,231 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:57,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:57,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:57,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:57,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:57,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:57,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:57,232 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:57,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:57,232 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:57,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:57,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:57,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:57,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:57,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:57,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:57,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:57,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:57,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:57,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:57,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:57,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:57,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:57,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:57,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:57,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:57,597 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:57,598 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:57,598 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-11-06 18:47:57,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8781b9c13/a231f6830b9745f4a5cf7f4964ccec0c/FLAG228fd4e1f [2019-11-06 18:47:58,096 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:58,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_07.i [2019-11-06 18:47:58,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8781b9c13/a231f6830b9745f4a5cf7f4964ccec0c/FLAG228fd4e1f [2019-11-06 18:47:58,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8781b9c13/a231f6830b9745f4a5cf7f4964ccec0c [2019-11-06 18:47:58,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:58,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:58,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:58,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:58,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:58,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58, skipping insertion in model container [2019-11-06 18:47:58,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,536 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:58,557 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:58,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:58,799 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:58,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:58,852 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:58,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58 WrapperNode [2019-11-06 18:47:58,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:58,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:58,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:58,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:58,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (1/1) ... [2019-11-06 18:47:58,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:58,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:58,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:58,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:58,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (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 [2019-11-06 18:47:59,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:59,327 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:59,328 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:59,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:59 BoogieIcfgContainer [2019-11-06 18:47:59,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:59,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:59,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:59,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:59,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:58" (1/3) ... [2019-11-06 18:47:59,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1cd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:59, skipping insertion in model container [2019-11-06 18:47:59,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:58" (2/3) ... [2019-11-06 18:47:59,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1cd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:59, skipping insertion in model container [2019-11-06 18:47:59,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:59" (3/3) ... [2019-11-06 18:47:59,338 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2019-11-06 18:47:59,351 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:59,359 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:59,372 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:59,400 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:59,400 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:59,401 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:59,401 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:59,402 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:59,402 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:59,402 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:59,402 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:47:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:59,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:59,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:59,431 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:47:59,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:59,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121330561] [2019-11-06 18:47:59,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:59,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121330561] [2019-11-06 18:47:59,641 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:59,641 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:59,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539440931] [2019-11-06 18:47:59,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:59,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:59,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:59,659 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:47:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:59,779 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:47:59,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:59,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:47:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:59,793 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:47:59,793 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:47:59,799 INFO L630 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 [2019-11-06 18:47:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:47:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:47:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:47:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:47:59,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:47:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:59,849 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:47:59,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:47:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:59,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:59,850 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:59,851 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:47:59,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:59,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541018629] [2019-11-06 18:47:59,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:59,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541018629] [2019-11-06 18:47:59,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:59,928 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:59,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038682612] [2019-11-06 18:47:59,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:59,930 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:59,931 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:48:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:00,037 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:48:00,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:00,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:48:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:00,039 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:48:00,039 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:48:00,040 INFO L630 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 [2019-11-06 18:48:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:48:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:48:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:48:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:48:00,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:48:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:00,047 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:48:00,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:48:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:48:00,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:00,048 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:00,049 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:48:00,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:00,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188880566] [2019-11-06 18:48:00,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:00,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188880566] [2019-11-06 18:48:00,105 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:00,105 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:48:00,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929122234] [2019-11-06 18:48:00,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:48:00,107 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:48:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:00,107 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:48:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:00,195 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:48:00,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:00,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:48:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:00,201 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:48:00,201 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:48:00,202 INFO L630 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 [2019-11-06 18:48:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:48:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:48:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:48:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:48:00,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:48:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:00,222 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:48:00,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:48:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:48:00,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:00,224 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:00,225 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:48:00,226 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:00,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454101580] [2019-11-06 18:48:00,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:00,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454101580] [2019-11-06 18:48:00,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346209440] [2019-11-06 18:48:00,351 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 [2019-11-06 18:48:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:48:00,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:48:00,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:00,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:48:00,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903875668] [2019-11-06 18:48:00,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:48:00,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:00,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:48:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:00,475 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:48:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:00,608 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:48:00,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:48:00,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:48:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:00,610 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:48:00,610 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:48:00,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:48:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:48:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:48:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:48:00,617 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:48:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:00,618 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:48:00,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:48:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:48:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:48:00,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:00,619 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:00,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:00,824 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:48:00,825 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:00,826 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262683476] [2019-11-06 18:48:00,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:48:00,952 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262683476] [2019-11-06 18:48:00,952 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083994181] [2019-11-06 18:48:00,952 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 [2019-11-06 18:48:01,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:01,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:01,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:01,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:48:01,057 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:01,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:48:01,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670954456] [2019-11-06 18:48:01,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:48:01,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:48:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:01,059 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-06 18:48:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:01,183 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-11-06 18:48:01,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:48:01,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 18:48:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:01,186 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:48:01,186 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:48:01,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:48:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:48:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:48:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:48:01,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-11-06 18:48:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:01,195 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:48:01,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:48:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:48:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:48:01,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:01,196 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:01,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:01,400 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-11-06 18:48:01,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:01,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457197128] [2019-11-06 18:48:01,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:01,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457197128] [2019-11-06 18:48:01,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452421196] [2019-11-06 18:48:01,517 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 [2019-11-06 18:48:01,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:48:01,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:01,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:01,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:01,601 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:01,601 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:48:01,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12540633] [2019-11-06 18:48:01,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:48:01,603 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:48:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:01,604 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-06 18:48:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:01,735 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-06 18:48:01,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:48:01,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:48:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:01,737 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:48:01,737 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:48:01,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:48:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-11-06 18:48:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:48:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:48:01,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-11-06 18:48:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:01,745 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:48:01,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:48:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:48:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:48:01,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:01,746 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:01,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:01,959 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-11-06 18:48:01,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:01,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264291548] [2019-11-06 18:48:01,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:02,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264291548] [2019-11-06 18:48:02,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837790813] [2019-11-06 18:48:02,097 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 [2019-11-06 18:48:02,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:02,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:02,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:02,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:48:02,262 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:02,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-06 18:48:02,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161360934] [2019-11-06 18:48:02,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:48:02,264 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:48:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:02,265 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-11-06 18:48:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:02,431 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-06 18:48:02,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:48:02,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2019-11-06 18:48:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:02,433 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:48:02,433 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:48:02,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:48:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2019-11-06 18:48:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:48:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 18:48:02,441 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2019-11-06 18:48:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:02,441 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 18:48:02,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:48:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 18:48:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:48:02,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:02,442 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:02,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:02,646 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1290022011, now seen corresponding path program 5 times [2019-11-06 18:48:02,647 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:02,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266063115] [2019-11-06 18:48:02,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:48:02,776 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266063115] [2019-11-06 18:48:02,776 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105342439] [2019-11-06 18:48:02,777 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 [2019-11-06 18:48:03,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:48:03,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:03,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:48:03,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:48:03,173 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:03,173 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2019-11-06 18:48:03,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289494498] [2019-11-06 18:48:03,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:48:03,174 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:48:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:03,175 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 20 states. [2019-11-06 18:48:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:03,373 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-11-06 18:48:03,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:48:03,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-11-06 18:48:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:03,374 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:48:03,375 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:48:03,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:48:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2019-11-06 18:48:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:48:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-06 18:48:03,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2019-11-06 18:48:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:03,383 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-06 18:48:03,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:48:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-06 18:48:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:48:03,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:03,385 INFO L410 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:03,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:03,593 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash 678305990, now seen corresponding path program 6 times [2019-11-06 18:48:03,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:03,594 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802555755] [2019-11-06 18:48:03,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:03,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802555755] [2019-11-06 18:48:03,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901828384] [2019-11-06 18:48:03,733 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 [2019-11-06 18:48:03,973 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:48:03,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:03,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:03,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:04,009 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:04,009 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:48:04,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652121157] [2019-11-06 18:48:04,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:48:04,010 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:48:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:04,011 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-11-06 18:48:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:04,161 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-11-06 18:48:04,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:48:04,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 18:48:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:04,163 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:48:04,163 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:48:04,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:48:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-11-06 18:48:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:48:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-06 18:48:04,170 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-06 18:48:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:04,171 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-06 18:48:04,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:48:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-06 18:48:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:48:04,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:04,172 INFO L410 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:04,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:04,385 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1729755721, now seen corresponding path program 7 times [2019-11-06 18:48:04,386 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:04,386 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787503920] [2019-11-06 18:48:04,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:04,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787503920] [2019-11-06 18:48:04,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073064431] [2019-11-06 18:48:04,546 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 [2019-11-06 18:48:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:04,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:48:04,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:48:04,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:04,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 26 [2019-11-06 18:48:04,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033310318] [2019-11-06 18:48:04,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:48:04,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:48:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:04,756 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 26 states. [2019-11-06 18:48:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:05,017 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2019-11-06 18:48:05,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:48:05,017 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2019-11-06 18:48:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:05,018 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:48:05,019 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:48:05,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:48:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-11-06 18:48:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:48:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-06 18:48:05,027 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2019-11-06 18:48:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:05,028 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-06 18:48:05,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:48:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-06 18:48:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:48:05,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:05,029 INFO L410 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:05,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:05,244 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:05,244 INFO L82 PathProgramCache]: Analyzing trace with hash 937361062, now seen corresponding path program 8 times [2019-11-06 18:48:05,245 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:05,245 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295716838] [2019-11-06 18:48:05,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 18:48:05,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295716838] [2019-11-06 18:48:05,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078755286] [2019-11-06 18:48:05,393 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 [2019-11-06 18:48:05,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:05,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:05,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:48:05,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:48:05,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:05,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25] total 32 [2019-11-06 18:48:05,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701435294] [2019-11-06 18:48:05,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:48:05,685 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:48:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:05,686 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 32 states. [2019-11-06 18:48:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:05,931 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-06 18:48:05,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:48:05,931 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-11-06 18:48:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:05,933 INFO L225 Difference]: With dead ends: 103 [2019-11-06 18:48:05,933 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:48:05,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:48:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2019-11-06 18:48:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:48:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-06 18:48:05,942 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2019-11-06 18:48:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:05,943 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-06 18:48:05,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:48:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-06 18:48:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:48:05,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:05,944 INFO L410 BasicCegarLoop]: trace histogram [28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:06,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:06,149 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -99026199, now seen corresponding path program 9 times [2019-11-06 18:48:06,150 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:06,150 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508341410] [2019-11-06 18:48:06,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:06,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508341410] [2019-11-06 18:48:06,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362844267] [2019-11-06 18:48:06,304 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 [2019-11-06 18:48:07,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:48:07,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:07,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:48:07,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:07,392 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:07,392 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:48:07,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430075783] [2019-11-06 18:48:07,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:48:07,393 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:07,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:48:07,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:07,394 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2019-11-06 18:48:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:07,597 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2019-11-06 18:48:07,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:48:07,598 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2019-11-06 18:48:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:07,599 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:48:07,599 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 18:48:07,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 18:48:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2019-11-06 18:48:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:48:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-06 18:48:07,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2019-11-06 18:48:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:07,608 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-06 18:48:07,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:48:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-06 18:48:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:48:07,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:07,609 INFO L410 BasicCegarLoop]: trace histogram [28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:07,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:07,822 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash -892705658, now seen corresponding path program 10 times [2019-11-06 18:48:07,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:07,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408888288] [2019-11-06 18:48:07,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:07,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408888288] [2019-11-06 18:48:07,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854501199] [2019-11-06 18:48:07,989 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 [2019-11-06 18:48:08,062 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:08,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:08,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:48:08,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:48:08,383 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:08,383 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31] total 40 [2019-11-06 18:48:08,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943634530] [2019-11-06 18:48:08,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:48:08,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:08,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:48:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=818, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:48:08,385 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 40 states. [2019-11-06 18:48:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:08,739 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2019-11-06 18:48:08,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:48:08,740 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 53 [2019-11-06 18:48:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:08,741 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:48:08,742 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:48:08,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=742, Invalid=818, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:48:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:48:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-11-06 18:48:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 18:48:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-06 18:48:08,751 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 53 [2019-11-06 18:48:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:08,752 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-06 18:48:08,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:48:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-06 18:48:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:48:08,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:08,753 INFO L410 BasicCegarLoop]: trace histogram [36, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:08,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:08,960 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1970365303, now seen corresponding path program 11 times [2019-11-06 18:48:08,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:08,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931663395] [2019-11-06 18:48:08,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-06 18:48:09,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931663395] [2019-11-06 18:48:09,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679058152] [2019-11-06 18:48:09,152 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