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-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:18:41,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:18:41,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:18:41,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 11:18:41,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:18:41,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:18:41,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:18:41,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:18:41,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:18:41,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:18:41,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:18:41,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:18:41,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:18:41,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:18:41,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:18:41,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:18:41,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:18:41,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:18:41,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:18:41,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:18:41,531 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 [2019-10-02 11:18:41,552 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:18:41,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:18:41,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:18:41,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:18:41,555 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:18:41,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:18:41,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:18:41,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:18:41,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:18:41,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:18:41,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:18:41,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:18:41,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:18:41,557 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:18:41,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:18:41,558 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:18:41,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:18:41,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:18:41,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:18:41,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:18:41,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:18:41,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:18:41,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:18:41,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:18:41,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:18:41,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:18:41,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:18:41,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:18:41,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:18:41,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:18:41,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:18:41,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:18:41,617 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:18:41,617 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:18:41,618 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2019-10-02 11:18:41,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe61d2e37/7c06d4d48bf34afc8eabcfca62f8b969/FLAGc39d9508b [2019-10-02 11:18:42,157 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:18:42,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2019-10-02 11:18:42,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe61d2e37/7c06d4d48bf34afc8eabcfca62f8b969/FLAGc39d9508b [2019-10-02 11:18:42,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe61d2e37/7c06d4d48bf34afc8eabcfca62f8b969 [2019-10-02 11:18:42,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:18:42,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:18:42,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:18:42,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:18:42,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:18:42,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abffbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42, skipping insertion in model container [2019-10-02 11:18:42,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,614 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:18:42,637 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:18:42,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:18:42,817 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:18:42,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:18:42,848 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:18:42,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42 WrapperNode [2019-10-02 11:18:42,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:18:42,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:18:42,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:18:42,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:18:42,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (1/1) ... [2019-10-02 11:18:42,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:18:42,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:18:42,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:18:42,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:18:42,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (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 [2019-10-02 11:18:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:18:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:18:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 11:18:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:18:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:18:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:18:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:18:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:18:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:18:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:18:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:18:43,169 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:18:43,169 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 11:18:43,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:18:43 BoogieIcfgContainer [2019-10-02 11:18:43,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:18:43,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:18:43,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:18:43,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:18:43,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:18:42" (1/3) ... [2019-10-02 11:18:43,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a408bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:18:43, skipping insertion in model container [2019-10-02 11:18:43,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:18:42" (2/3) ... [2019-10-02 11:18:43,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a408bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:18:43, skipping insertion in model container [2019-10-02 11:18:43,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:18:43" (3/3) ... [2019-10-02 11:18:43,178 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2019-10-02 11:18:43,187 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:18:43,195 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:18:43,211 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:18:43,240 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:18:43,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:18:43,241 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:18:43,241 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:18:43,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:18:43,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:18:43,242 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:18:43,242 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:18:43,242 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:18:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-02 11:18:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:18:43,263 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:43,264 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:43,266 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2019-10-02 11:18:43,271 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:43,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:43,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:18:43,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:43,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:18:43,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 11:18:43,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 11:18:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 11:18:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 11:18:43,456 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-02 11:18:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:43,494 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-02 11:18:43,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 11:18:43,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-02 11:18:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:43,505 INFO L225 Difference]: With dead ends: 31 [2019-10-02 11:18:43,505 INFO L226 Difference]: Without dead ends: 12 [2019-10-02 11:18:43,509 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 11:18:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-02 11:18:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-02 11:18:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-02 11:18:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-02 11:18:43,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-02 11:18:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:43,553 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-02 11:18:43,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 11:18:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-02 11:18:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-02 11:18:43,554 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:43,555 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:43,555 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash -429188558, now seen corresponding path program 1 times [2019-10-02 11:18:43,556 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:43,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:43,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:18:43,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:43,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:18:43,607 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-02 11:18:43,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:18:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:43,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-02 11:18:43,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:18:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:43,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:18:43,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-10-02 11:18:43,740 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:18:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:18:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:18:43,742 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-10-02 11:18:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:43,763 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-02 11:18:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 11:18:43,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-02 11:18:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:43,765 INFO L225 Difference]: With dead ends: 18 [2019-10-02 11:18:43,765 INFO L226 Difference]: Without dead ends: 13 [2019-10-02 11:18:43,766 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:18:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-02 11:18:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-02 11:18:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-02 11:18:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-02 11:18:43,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-02 11:18:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:43,771 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-02 11:18:43,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:18:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-02 11:18:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-02 11:18:43,773 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:43,773 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:43,773 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash -384405667, now seen corresponding path program 2 times [2019-10-02 11:18:43,774 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:43,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:43,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:18:43,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:43,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:18:43,836 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:18:43,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:18:43,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:18:43,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:18:43,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 11:18:43,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:18:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:18:43,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:18:43,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-02 11:18:43,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:18:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:18:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:18:43,965 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-10-02 11:18:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:43,989 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-02 11:18:43,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 11:18:43,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-10-02 11:18:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:43,991 INFO L225 Difference]: With dead ends: 19 [2019-10-02 11:18:43,991 INFO L226 Difference]: Without dead ends: 14 [2019-10-02 11:18:43,992 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:18:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-02 11:18:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-02 11:18:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-02 11:18:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-02 11:18:43,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-02 11:18:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:43,997 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-02 11:18:43,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:18:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-02 11:18:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-02 11:18:43,998 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:43,998 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:43,998 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1003863954, now seen corresponding path program 3 times [2019-10-02 11:18:43,999 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:43,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:44,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:18:44,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:44,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:18:44,102 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:18:44,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:18:44,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 11:18:44,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:18:44,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 11:18:44,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:18:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:44,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:18:44,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-02 11:18:44,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:18:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:18:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:18:44,223 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-10-02 11:18:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:44,262 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-02 11:18:44,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:18:44,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-10-02 11:18:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:44,265 INFO L225 Difference]: With dead ends: 20 [2019-10-02 11:18:44,265 INFO L226 Difference]: Without dead ends: 15 [2019-10-02 11:18:44,265 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:18:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-02 11:18:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-02 11:18:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-02 11:18:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-02 11:18:44,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-02 11:18:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:44,278 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-02 11:18:44,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:18:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-02 11:18:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-02 11:18:44,279 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:44,279 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:44,280 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1090549245, now seen corresponding path program 4 times [2019-10-02 11:18:44,280 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:44,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:44,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:18:44,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:44,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:18:44,427 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 11:18:44,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:18:44,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:18:44,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:18:44,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-02 11:18:44,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:18:44,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:18:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:44,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:18:44,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-10-02 11:18:44,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:18:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:18:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:18:44,542 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-10-02 11:18:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:44,638 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-02 11:18:44,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:18:44,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-10-02 11:18:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:44,640 INFO L225 Difference]: With dead ends: 21 [2019-10-02 11:18:44,640 INFO L226 Difference]: Without dead ends: 16 [2019-10-02 11:18:44,641 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:18:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-02 11:18:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-02 11:18:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-02 11:18:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-02 11:18:44,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-02 11:18:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:44,645 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-02 11:18:44,645 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:18:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-02 11:18:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 11:18:44,646 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:18:44,646 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:18:44,647 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:18:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:18:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash -517174030, now seen corresponding path program 5 times [2019-10-02 11:18:44,647 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:18:44,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:18:44,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:18:44,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:18:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:18:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:18:44,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:18:44,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-02 11:18:44,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:18:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:18:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:18:44,724 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2019-10-02 11:18:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:18:44,740 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-10-02 11:18:44,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:18:44,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-02 11:18:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:18:44,742 INFO L225 Difference]: With dead ends: 16 [2019-10-02 11:18:44,743 INFO L226 Difference]: Without dead ends: 0 [2019-10-02 11:18:44,743 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:18:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-02 11:18:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-02 11:18:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-02 11:18:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-02 11:18:44,748 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-10-02 11:18:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:18:44,749 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-02 11:18:44,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:18:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-02 11:18:44,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-02 11:18:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-02 11:18:44,907 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-02 11:18:44,908 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-02 11:18:44,908 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-02 11:18:44,908 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-02 11:18:44,908 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-02 11:18:44,908 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-02 11:18:44,908 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2019-10-02 11:18:44,908 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2019-10-02 11:18:44,909 INFO L443 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-10-02 11:18:44,909 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2019-10-02 11:18:44,909 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (and (<= 8 main_~j~0) (<= main_~j~0 (+ main_~i~0 3)) (<= main_~i~0 5)) (and (<= 6 main_~j~0) (<= (+ main_~j~0 3) main_~i~0) (<= main_~j~0 6)) (and (<= main_~j~0 (+ main_~i~0 9)) (<= main_~i~0 1) (<= 10 main_~j~0)) (and (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 7)) (and (<= main_~i~0 3) (<= main_~j~0 (+ main_~i~0 6)) (<= 9 main_~j~0))) [2019-10-02 11:18:44,909 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (and (<= 6 main_~j~0) (<= main_~j~0 6)) [2019-10-02 11:18:44,909 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-02 11:18:44,909 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-02 11:18:44,910 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-02 11:18:44,910 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-02 11:18:44,911 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-02 11:18:44,911 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-02 11:18:44,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:18:44 BoogieIcfgContainer [2019-10-02 11:18:44,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 11:18:44,941 INFO L168 Benchmark]: Toolchain (without parser) took 2340.39 ms. Allocated memory was 141.0 MB in the beginning and 228.1 MB in the end (delta: 87.0 MB). Free memory was 89.1 MB in the beginning and 159.6 MB in the end (delta: -70.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,943 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.97 ms. Allocated memory is still 141.0 MB. Free memory was 88.8 MB in the beginning and 79.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,947 INFO L168 Benchmark]: Boogie Preprocessor took 120.76 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 79.6 MB in the beginning and 178.9 MB in the end (delta: -99.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,949 INFO L168 Benchmark]: RCFGBuilder took 199.88 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 167.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,956 INFO L168 Benchmark]: TraceAbstraction took 1764.23 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 167.1 MB in the beginning and 159.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2019-10-02 11:18:44,964 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.97 ms. Allocated memory is still 141.0 MB. Free memory was 88.8 MB in the beginning and 79.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.76 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 79.6 MB in the beginning and 178.9 MB in the end (delta: -99.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 199.88 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 167.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1764.23 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 167.1 MB in the beginning and 159.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((8 <= j && j <= i + 3) && i <= 5) || ((6 <= j && j + 3 <= i) && j <= 6)) || ((j <= i + 9 && i <= 1) && 10 <= j)) || ((7 <= j && j <= i) && i <= 7)) || ((i <= 3 && j <= i + 6) && 9 <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 2 SDslu, 115 SDs, 0 SdLazy, 98 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 71 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 3685 SizeOfPredicates, 8 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 15/55 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...