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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 11:30:11,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 11:30:11,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 11:30:11,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 11:30:11,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 11:30:11,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 11:30:11,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 11:30:11,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 11:30:11,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 11:30:11,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 11:30:11,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 11:30:11,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 11:30:11,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 11:30:11,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 11:30:11,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 11:30:11,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 11:30:11,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 11:30:11,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 11:30:11,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 11:30:11,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 11:30:11,491 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 [2019-09-05 11:30:11,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 11:30:11,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 11:30:11,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 11:30:11,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 11:30:11,524 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 11:30:11,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 11:30:11,524 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 11:30:11,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 11:30:11,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 11:30:11,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 11:30:11,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 11:30:11,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 11:30:11,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 11:30:11,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 11:30:11,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 11:30:11,528 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 11:30:11,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 11:30:11,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 11:30:11,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 11:30:11,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 11:30:11,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 11:30:11,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:30:11,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 11:30:11,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 11:30:11,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 11:30:11,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 11:30:11,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 11:30:11,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 11:30:11,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 11:30:11,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 11:30:11,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 11:30:11,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 11:30:11,610 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 11:30:11,610 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 11:30:11,611 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-09-05 11:30:11,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b23b194/635c80a2267b4ca0ad7ce80948d40252/FLAG27bf4f443 [2019-09-05 11:30:12,152 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 11:30:12,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-09-05 11:30:12,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b23b194/635c80a2267b4ca0ad7ce80948d40252/FLAG27bf4f443 [2019-09-05 11:30:12,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b23b194/635c80a2267b4ca0ad7ce80948d40252 [2019-09-05 11:30:12,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 11:30:12,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 11:30:12,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 11:30:12,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 11:30:12,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 11:30:12,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f61ecf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12, skipping insertion in model container [2019-09-05 11:30:12,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,573 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 11:30:12,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 11:30:12,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:30:12,765 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 11:30:12,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:30:12,792 INFO L192 MainTranslator]: Completed translation [2019-09-05 11:30:12,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12 WrapperNode [2019-09-05 11:30:12,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 11:30:12,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 11:30:12,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 11:30:12,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 11:30:12,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (1/1) ... [2019-09-05 11:30:12,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 11:30:12,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 11:30:12,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 11:30:12,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 11:30:12,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (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 [2019-09-05 11:30:12,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 11:30:12,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 11:30:12,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 11:30:12,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 11:30:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 11:30:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 11:30:12,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 11:30:12,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 11:30:12,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 11:30:13,117 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 11:30:13,118 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 11:30:13,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:30:13 BoogieIcfgContainer [2019-09-05 11:30:13,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 11:30:13,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 11:30:13,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 11:30:13,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 11:30:13,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 11:30:12" (1/3) ... [2019-09-05 11:30:13,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbfd50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:30:13, skipping insertion in model container [2019-09-05 11:30:13,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:30:12" (2/3) ... [2019-09-05 11:30:13,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbfd50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:30:13, skipping insertion in model container [2019-09-05 11:30:13,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:30:13" (3/3) ... [2019-09-05 11:30:13,127 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-09-05 11:30:13,137 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 11:30:13,144 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 11:30:13,161 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 11:30:13,193 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 11:30:13,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 11:30:13,194 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 11:30:13,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 11:30:13,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 11:30:13,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 11:30:13,195 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 11:30:13,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 11:30:13,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 11:30:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-05 11:30:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 11:30:13,220 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:13,221 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:13,223 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-05 11:30:13,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:13,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:13,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:13,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:30:13,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 11:30:13,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 11:30:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 11:30:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 11:30:13,345 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-05 11:30:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:13,363 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-05 11:30:13,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 11:30:13,364 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 11:30:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:13,370 INFO L225 Difference]: With dead ends: 30 [2019-09-05 11:30:13,371 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 11:30:13,374 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 11:30:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 11:30:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 11:30:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 11:30:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-05 11:30:13,403 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-05 11:30:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:13,404 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-05 11:30:13,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 11:30:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-05 11:30:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 11:30:13,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:13,405 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:13,405 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-05 11:30:13,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:13,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:13,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:13,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:30:13,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 11:30:13,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 11:30:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 11:30:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:30:13,493 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-05 11:30:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:13,533 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-05 11:30:13,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 11:30:13,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-05 11:30:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:13,535 INFO L225 Difference]: With dead ends: 24 [2019-09-05 11:30:13,536 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 11:30:13,537 INFO L628 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 [2019-09-05 11:30:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 11:30:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-05 11:30:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 11:30:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-05 11:30:13,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-05 11:30:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:13,544 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-05 11:30:13,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 11:30:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-05 11:30:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 11:30:13,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:13,546 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:13,546 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-09-05 11:30:13,547 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:13,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:13,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:13,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:30:13,590 INFO L223 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:30:13,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 11:30:13,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:30:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:13,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 11:30:13,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-05 11:30:13,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 11:30:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 11:30:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-05 11:30:13,699 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-09-05 11:30:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:13,761 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-09-05 11:30:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 11:30:13,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-05 11:30:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:13,763 INFO L225 Difference]: With dead ends: 33 [2019-09-05 11:30:13,763 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 11:30:13,764 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-05 11:30:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 11:30:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-09-05 11:30:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 11:30:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-05 11:30:13,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 13 [2019-09-05 11:30:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:13,771 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-05 11:30:13,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 11:30:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-05 11:30:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 11:30:13,772 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:13,773 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:13,773 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2019-09-05 11:30:13,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:13,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:13,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:13,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:30:13,894 INFO L223 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 [2019-09-05 11:30:13,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:13,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-05 11:30:13,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:30:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:14,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:30:14,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-09-05 11:30:14,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 11:30:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 11:30:14,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:30:14,002 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2019-09-05 11:30:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:14,082 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-09-05 11:30:14,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 11:30:14,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-05 11:30:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:14,086 INFO L225 Difference]: With dead ends: 39 [2019-09-05 11:30:14,086 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 11:30:14,087 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:30:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 11:30:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-05 11:30:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 11:30:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-09-05 11:30:14,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2019-09-05 11:30:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:14,096 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-09-05 11:30:14,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 11:30:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-09-05 11:30:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 11:30:14,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:14,097 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:14,098 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 2 times [2019-09-05 11:30:14,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:14,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:14,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:14,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:30:14,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:30:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:14,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:30:14,235 INFO L223 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) [2019-09-05 11:30:14,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:30:14,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:30:14,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:30:14,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 11:30:14,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:30:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:30:14,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:30:14,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-05 11:30:14,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 11:30:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 11:30:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:30:14,313 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2019-09-05 11:30:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:30:14,403 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-09-05 11:30:14,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 11:30:14,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-05 11:30:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:30:14,405 INFO L225 Difference]: With dead ends: 40 [2019-09-05 11:30:14,406 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 11:30:14,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:30:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 11:30:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-05 11:30:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 11:30:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-09-05 11:30:14,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2019-09-05 11:30:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:30:14,414 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-09-05 11:30:14,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 11:30:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-09-05 11:30:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 11:30:14,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:30:14,416 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:30:14,416 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:30:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:30:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2019-09-05 11:30:14,417 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:30:14,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:30:14,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:14,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:30:14,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:30:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 11:30:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 11:30:14,467 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-05 11:30:14,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 11:30:14 BoogieIcfgContainer [2019-09-05 11:30:14,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 11:30:14,524 INFO L168 Benchmark]: Toolchain (without parser) took 1965.94 ms. Allocated memory was 137.4 MB in the beginning and 217.1 MB in the end (delta: 79.7 MB). Free memory was 84.7 MB in the beginning and 187.3 MB in the end (delta: -102.6 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,526 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 137.4 MB. Free memory was 103.3 MB in the beginning and 103.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.91 ms. Allocated memory is still 137.4 MB. Free memory was 84.5 MB in the beginning and 75.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,530 INFO L168 Benchmark]: Boogie Preprocessor took 115.60 ms. Allocated memory was 137.4 MB in the beginning and 197.7 MB in the end (delta: 60.3 MB). Free memory was 75.5 MB in the beginning and 175.5 MB in the end (delta: -100.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,532 INFO L168 Benchmark]: RCFGBuilder took 210.37 ms. Allocated memory is still 197.7 MB. Free memory was 175.5 MB in the beginning and 164.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,534 INFO L168 Benchmark]: TraceAbstraction took 1399.78 ms. Allocated memory was 197.7 MB in the beginning and 217.1 MB in the end (delta: 19.4 MB). Free memory was 164.0 MB in the beginning and 187.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 101.2 MB. Max. memory is 7.1 GB. [2019-09-05 11:30:14,548 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 137.4 MB. Free memory was 103.3 MB in the beginning and 103.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.91 ms. Allocated memory is still 137.4 MB. Free memory was 84.5 MB in the beginning and 75.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.60 ms. Allocated memory was 137.4 MB in the beginning and 197.7 MB in the end (delta: 60.3 MB). Free memory was 75.5 MB in the beginning and 175.5 MB in the end (delta: -100.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 210.37 ms. Allocated memory is still 197.7 MB. Free memory was 175.5 MB in the beginning and 164.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1399.78 ms. Allocated memory was 197.7 MB in the beginning and 217.1 MB in the end (delta: 19.4 MB). Free memory was 164.0 MB in the beginning and 187.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 101.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 53 SDslu, 80 SDs, 0 SdLazy, 90 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 6942 SizeOfPredicates, 2 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 8/186 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...