/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:35:57,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:35:57,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:35:57,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 00:35:57,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:35:57,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:35:57,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:35:57,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:35:57,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:35:57,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:35:57,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:35:57,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:35:57,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:35:57,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:35:57,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:35:57,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:35:57,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:35:57,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:35:57,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:35:57,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:35:57,291 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 [2019-11-07 00:35:57,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:35:57,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:35:57,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:35:57,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:35:57,307 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:35:57,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:35:57,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:35:57,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:35:57,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:35:57,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:35:57,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:35:57,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:35:57,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:35:57,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:35:57,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:35:57,309 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:35:57,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:35:57,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:35:57,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:35:57,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:35:57,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:35:57,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:57,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:35:57,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:35:57,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:35:57,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:35:57,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:35:57,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:35:57,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:35:57,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:35:57,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:35:57,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:35:57,637 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:35:57,637 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:35:57,638 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-11-07 00:35:57,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9758b1500/7615c1dafa114ee2854e6758fd05e55c/FLAG43e85086b [2019-11-07 00:35:58,134 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:35:58,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-11-07 00:35:58,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9758b1500/7615c1dafa114ee2854e6758fd05e55c/FLAG43e85086b [2019-11-07 00:35:58,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9758b1500/7615c1dafa114ee2854e6758fd05e55c [2019-11-07 00:35:58,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:35:58,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:35:58,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:58,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:35:58,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:35:58,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:58,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2910f1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58, skipping insertion in model container [2019-11-07 00:35:58,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:58,568 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:35:58,585 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:35:58,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:58,838 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:35:58,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:58,874 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:35:58,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58 WrapperNode [2019-11-07 00:35:58,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:58,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:35:58,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:35:58,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:35:58,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:58,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... [2019-11-07 00:35:59,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:35:59,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:35:59,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:35:59,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:35:59,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:59,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:35:59,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:35:59,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:35:59,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:35:59,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:35:59,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:35:59,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:35:59,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:35:59,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:35:59,256 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:35:59,256 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:35:59,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:59 BoogieIcfgContainer [2019-11-07 00:35:59,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:35:59,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:35:59,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:35:59,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:35:59,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:35:58" (1/3) ... [2019-11-07 00:35:59,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d34555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:59, skipping insertion in model container [2019-11-07 00:35:59,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:58" (2/3) ... [2019-11-07 00:35:59,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d34555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:59, skipping insertion in model container [2019-11-07 00:35:59,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:59" (3/3) ... [2019-11-07 00:35:59,276 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-11-07 00:35:59,288 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:35:59,294 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:35:59,305 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:35:59,330 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:35:59,331 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:35:59,331 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:35:59,331 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:35:59,331 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:35:59,331 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:35:59,331 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:35:59,332 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:35:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 00:35:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:35:59,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:59,357 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:59,359 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-11-07 00:35:59,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:59,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407228882] [2019-11-07 00:35:59,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:59,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407228882] [2019-11-07 00:35:59,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:59,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 00:35:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036241830] [2019-11-07 00:35:59,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:35:59,481 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:35:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:35:59,495 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-07 00:35:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:59,515 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-07 00:35:59,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:35:59,517 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 00:35:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:59,525 INFO L225 Difference]: With dead ends: 30 [2019-11-07 00:35:59,525 INFO L226 Difference]: Without dead ends: 13 [2019-11-07 00:35:59,529 INFO L630 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 [2019-11-07 00:35:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-07 00:35:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-07 00:35:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-07 00:35:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-07 00:35:59,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-07 00:35:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:59,565 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-07 00:35:59,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:35:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-07 00:35:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:35:59,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:59,566 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:59,566 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-11-07 00:35:59,567 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:59,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083333462] [2019-11-07 00:35:59,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:59,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083333462] [2019-11-07 00:35:59,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:59,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:35:59,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882751859] [2019-11-07 00:35:59,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:35:59,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:35:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:35:59,633 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-07 00:35:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:59,687 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-11-07 00:35:59,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:35:59,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 00:35:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:59,689 INFO L225 Difference]: With dead ends: 24 [2019-11-07 00:35:59,690 INFO L226 Difference]: Without dead ends: 16 [2019-11-07 00:35:59,698 INFO L630 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 [2019-11-07 00:35:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-07 00:35:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-07 00:35:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 00:35:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-07 00:35:59,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-11-07 00:35:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:59,710 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-07 00:35:59,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:35:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-07 00:35:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 00:35:59,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:59,715 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:59,716 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-11-07 00:35:59,717 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:59,717 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671835198] [2019-11-07 00:35:59,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:59,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671835198] [2019-11-07 00:35:59,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789821995] [2019-11-07 00:35:59,787 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 [2019-11-07 00:35:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:59,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:35:59,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:35:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:59,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:35:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:59,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:35:59,929 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-11-07 00:35:59,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241881224] [2019-11-07 00:35:59,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:35:59,930 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:59,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:35:59,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:35:59,931 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-11-07 00:35:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:59,992 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2019-11-07 00:35:59,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:35:59,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-07 00:35:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:59,995 INFO L225 Difference]: With dead ends: 28 [2019-11-07 00:35:59,996 INFO L226 Difference]: Without dead ends: 23 [2019-11-07 00:35:59,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:35:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-07 00:36:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-07 00:36:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 00:36:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-07 00:36:00,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2019-11-07 00:36:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:00,004 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-07 00:36:00,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:36:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-07 00:36:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 00:36:00,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:00,005 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:00,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:36:00,209 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1432745095, now seen corresponding path program 1 times [2019-11-07 00:36:00,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:00,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567153037] [2019-11-07 00:36:00,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:36:00,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567153037] [2019-11-07 00:36:00,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890538427] [2019-11-07 00:36:00,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 00:36:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:00,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:36:00,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:36:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:36:00,315 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:36:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:36:00,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1651907026] [2019-11-07 00:36:00,360 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 23 [2019-11-07 00:36:00,391 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:36:00,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:36:00,557 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:36:00,560 INFO L272 AbstractInterpreter]: Visited 14 different actions 65 times. Merged at 5 different actions 31 times. Widened at 1 different actions 4 times. Performed 154 root evaluator evaluations with a maximum evaluation depth of 5. Performed 154 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 7 fixpoints after 3 different actions. Largest state had 3 variables. [2019-11-07 00:36:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:00,564 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:36:00,565 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:36:00,565 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2019-11-07 00:36:00,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262242106] [2019-11-07 00:36:00,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:36:00,566 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:36:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:36:00,567 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2019-11-07 00:36:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:00,610 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-11-07 00:36:00,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:36:00,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-07 00:36:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:00,611 INFO L225 Difference]: With dead ends: 45 [2019-11-07 00:36:00,612 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 00:36:00,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:36:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 00:36:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 00:36:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 00:36:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-07 00:36:00,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-11-07 00:36:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:00,619 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-07 00:36:00,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:36:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-07 00:36:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 00:36:00,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:00,621 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:00,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:36:00,825 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 2 times [2019-11-07 00:36:00,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:00,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596237690] [2019-11-07 00:36:00,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:36:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:36:00,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596237690] [2019-11-07 00:36:00,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747252730] [2019-11-07 00:36:00,950 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:36:01,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-07 00:36:01,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 00:36:01,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 00:36:01,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:36:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:36:01,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:36:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:36:01,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [694201666] [2019-11-07 00:36:01,118 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-11-07 00:36:01,119 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-11-07 00:36:01,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:36:01,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2019-11-07 00:36:01,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038667657] [2019-11-07 00:36:01,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:36:01,120 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:36:01,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:36:01,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:36:01,126 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2019-11-07 00:36:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:36:01,200 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-11-07 00:36:01,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:36:01,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-07 00:36:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:36:01,202 INFO L225 Difference]: With dead ends: 40 [2019-11-07 00:36:01,202 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 00:36:01,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:36:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 00:36:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-07 00:36:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 00:36:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-07 00:36:01,209 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2019-11-07 00:36:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:36:01,209 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-07 00:36:01,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:36:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-07 00:36:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 00:36:01,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:36:01,211 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:36:01,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:36:01,423 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:36:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:36:01,424 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2019-11-07 00:36:01,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:36:01,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834783094] [2019-11-07 00:36:01,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:36:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-07 00:36:01,485 INFO L172 FreeRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-11-07 00:36:01,485 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-07 00:36:01,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:36:01 BoogieIcfgContainer [2019-11-07 00:36:01,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:36:01,513 INFO L168 Benchmark]: Toolchain (without parser) took 2961.34 ms. Allocated memory was 144.7 MB in the beginning and 234.9 MB in the end (delta: 90.2 MB). Free memory was 102.7 MB in the beginning and 174.8 MB in the end (delta: -72.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:01,514 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-07 00:36:01,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.44 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 93.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:01,516 INFO L168 Benchmark]: Boogie Preprocessor took 140.47 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 93.3 MB in the beginning and 181.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:01,518 INFO L168 Benchmark]: RCFGBuilder took 241.57 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 169.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:01,519 INFO L168 Benchmark]: TraceAbstraction took 2250.17 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 169.2 MB in the beginning and 174.8 MB in the end (delta: -5.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:36:01,523 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory is still 120.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.44 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 93.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.47 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 93.3 MB in the beginning and 181.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.57 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 169.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2250.17 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 169.2 MB in the beginning and 174.8 MB in the end (delta: -5.6 MB). Peak memory consumption was 26.9 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. Result: UNSAFE, OverallTime: 2.1s, OverallIterations: 6, TraceHistogramMax: 8, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 40 SDslu, 112 SDs, 0 SdLazy, 77 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s 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 DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7158 SizeOfPredicates, 5 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 134/222 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...