/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:23,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:23,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:23,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:15:23,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:15:23,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:15:23,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:15:23,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:15:23,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:15:23,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:15:23,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:15:23,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:15:23,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:15:23,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:15:23,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:15:23,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:15:23,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:15:23,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:15:23,152 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:23,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:23,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:23,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:23,154 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:23,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:23,154 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:23,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:23,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:23,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:23,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:23,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:23,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:23,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:23,156 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:23,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:23,156 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:23,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:23,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:23,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:23,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:23,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:23,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:23,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:23,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:23,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:23,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:23,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:23,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:23,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:23,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:23,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:23,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:23,475 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:23,476 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:23,477 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2019-11-23 22:15:23,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae4b6fe0/b27474c23da84060bd063e0d09399c0b/FLAG52aa3713e [2019-11-23 22:15:23,947 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:23,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2019-11-23 22:15:23,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae4b6fe0/b27474c23da84060bd063e0d09399c0b/FLAG52aa3713e [2019-11-23 22:15:24,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae4b6fe0/b27474c23da84060bd063e0d09399c0b [2019-11-23 22:15:24,356 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:24,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:24,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:24,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:24,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:24,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f20a8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24, skipping insertion in model container [2019-11-23 22:15:24,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:24,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:24,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:24,562 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:24,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:24,591 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:24,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24 WrapperNode [2019-11-23 22:15:24,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:24,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:24,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:24,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:24,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:24,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:24,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:24,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:24,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... [2019-11-23 22:15:24,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:24,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:24,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:24,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:24,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:24,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:24,946 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:24,946 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:15:24,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:24 BoogieIcfgContainer [2019-11-23 22:15:24,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:24,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:24,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:24,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:24,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:24" (1/3) ... [2019-11-23 22:15:24,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f520002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:24, skipping insertion in model container [2019-11-23 22:15:24,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:24" (2/3) ... [2019-11-23 22:15:24,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f520002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:24, skipping insertion in model container [2019-11-23 22:15:24,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:24" (3/3) ... [2019-11-23 22:15:24,959 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2019-11-23 22:15:24,968 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:24,975 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:24,986 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:25,015 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:25,016 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:25,016 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:25,016 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:25,016 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:25,016 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:25,017 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:25,017 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 22:15:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:15:25,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:25,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:15:25,033 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash 925772304, now seen corresponding path program 1 times [2019-11-23 22:15:25,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:25,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353071269] [2019-11-23 22:15:25,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:25,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353071269] [2019-11-23 22:15:25,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:25,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:15:25,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139035944] [2019-11-23 22:15:25,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:15:25,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:15:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:25,300 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 5 states. [2019-11-23 22:15:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:25,551 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2019-11-23 22:15:25,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:15:25,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-23 22:15:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:25,564 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:15:25,564 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:15:25,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:15:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2019-11-23 22:15:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:15:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 22:15:25,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2019-11-23 22:15:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:25,613 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 22:15:25,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:15:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 22:15:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:15:25,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:25,615 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:15:25,616 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash 925831886, now seen corresponding path program 1 times [2019-11-23 22:15:25,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:25,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177365795] [2019-11-23 22:15:25,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:25,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177365795] [2019-11-23 22:15:25,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:25,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:15:25,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295105105] [2019-11-23 22:15:25,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:25,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:25,691 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2019-11-23 22:15:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:25,724 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-11-23 22:15:25,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:25,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-23 22:15:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:25,727 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:15:25,728 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:15:25,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:15:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 22:15:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:15:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-23 22:15:25,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 6 [2019-11-23 22:15:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:25,735 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-23 22:15:25,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-23 22:15:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:15:25,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:25,736 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:25,737 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1221646083, now seen corresponding path program 1 times [2019-11-23 22:15:25,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:25,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755654659] [2019-11-23 22:15:25,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:25,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755654659] [2019-11-23 22:15:25,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404315996] [2019-11-23 22:15:25,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:25,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:15:25,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:25,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:25,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-23 22:15:25,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618002799] [2019-11-23 22:15:25,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:15:25,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:15:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:25,920 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-23 22:15:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:25,943 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 22:15:25,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:25,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-23 22:15:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:25,945 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:15:25,945 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:15:25,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:15:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:15:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:15:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 22:15:25,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-11-23 22:15:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:25,951 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 22:15:25,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:15:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 22:15:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:15:25,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:25,952 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2019-11-23 22:15:26,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:26,155 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1859877048, now seen corresponding path program 2 times [2019-11-23 22:15:26,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:26,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167895665] [2019-11-23 22:15:26,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:26,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167895665] [2019-11-23 22:15:26,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647437611] [2019-11-23 22:15:26,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:26,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:26,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:26,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:26,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:26,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:26,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:15:26,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509948434] [2019-11-23 22:15:26,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:15:26,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:26,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:15:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:26,333 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2019-11-23 22:15:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:26,370 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-23 22:15:26,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:26,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-23 22:15:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:26,372 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:15:26,372 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:15:26,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:15:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 22:15:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:15:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 22:15:26,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-11-23 22:15:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:26,379 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 22:15:26,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:15:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 22:15:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:15:26,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:26,380 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2019-11-23 22:15:26,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:26,583 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1722038253, now seen corresponding path program 3 times [2019-11-23 22:15:26,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:26,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091964993] [2019-11-23 22:15:26,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:26,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091964993] [2019-11-23 22:15:26,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201385218] [2019-11-23 22:15:26,762 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true