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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:10,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:10,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:10,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:10,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:10,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:10,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:10,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:10,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:10,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:10,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:10,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:10,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:10,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:10,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:10,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:10,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:10,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:26:10,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:26:10,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:26:10,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:26:10,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:26:10,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:26:10,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:26:10,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-20 13:26:10,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:26:10,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:10,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:10,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:10,411 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:10,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:10,414 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:10,415 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:10,415 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:10,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:10,415 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:10,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:10,418 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:10,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:10,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:10,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:10,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:10,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:10,419 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:10,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:10,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:10,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:10,420 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:10,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:10,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:10,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:10,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:10,422 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:10,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:10,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:10,422 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:10,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:10,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:10,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:10,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:10,475 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:10,475 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-20 13:26:10,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d249045ef/f7daa01efae2437499c21a861e05ec4b/FLAG36bec8344 [2019-09-20 13:26:10,996 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:10,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-20 13:26:11,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d249045ef/f7daa01efae2437499c21a861e05ec4b/FLAG36bec8344 [2019-09-20 13:26:11,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d249045ef/f7daa01efae2437499c21a861e05ec4b [2019-09-20 13:26:11,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:11,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:11,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:11,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:11,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:11,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5d3bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11, skipping insertion in model container [2019-09-20 13:26:11,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:11,431 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:11,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:11,608 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:11,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:11,637 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:11,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11 WrapperNode [2019-09-20 13:26:11,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:11,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:11,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:11,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:11,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (1/1) ... [2019-09-20 13:26:11,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:11,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:11,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:11,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:11,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (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 [2019-09-20 13:26:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:12,053 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:12,053 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:26:12,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:12 BoogieIcfgContainer [2019-09-20 13:26:12,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:12,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:12,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:12,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:12,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:11" (1/3) ... [2019-09-20 13:26:12,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af2da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:12, skipping insertion in model container [2019-09-20 13:26:12,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:11" (2/3) ... [2019-09-20 13:26:12,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af2da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:12, skipping insertion in model container [2019-09-20 13:26:12,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:12" (3/3) ... [2019-09-20 13:26:12,063 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2019-09-20 13:26:12,073 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:12,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:12,105 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:12,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:12,153 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:12,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:12,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:12,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:12,154 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:12,154 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:12,155 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-20 13:26:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:26:12,190 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:12,191 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:12,195 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2019-09-20 13:26:12,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:12,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,269 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:12,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:12,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:12,343 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:12,347 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:12,362 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-20 13:26:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:12,391 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-20 13:26:12,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:12,393 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-20 13:26:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:12,406 INFO L225 Difference]: With dead ends: 26 [2019-09-20 13:26:12,406 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 13:26:12,410 INFO L636 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 [2019-09-20 13:26:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 13:26:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-20 13:26:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-20 13:26:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-20 13:26:12,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-09-20 13:26:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:12,458 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-20 13:26:12,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-20 13:26:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:26:12,459 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:12,460 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:12,461 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2019-09-20 13:26:12,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:12,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,470 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:12,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:12,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:12,604 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:12,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:12,607 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-09-20 13:26:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:12,630 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-09-20 13:26:12,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:12,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-20 13:26:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:12,632 INFO L225 Difference]: With dead ends: 31 [2019-09-20 13:26:12,632 INFO L226 Difference]: Without dead ends: 31 [2019-09-20 13:26:12,633 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-20 13:26:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-09-20 13:26:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 13:26:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-20 13:26:12,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-09-20 13:26:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:12,640 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-20 13:26:12,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-20 13:26:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:26:12,641 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:12,641 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:12,641 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:12,642 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2019-09-20 13:26:12,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:12,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:12,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:12,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:12,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:12,765 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:12,766 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-20 13:26:12,768 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [20], [28], [36], [42], [44], [46], [69], [72], [74], [80], [81], [82], [84] [2019-09-20 13:26:12,806 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:12,807 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:12,870 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-20 13:26:13,164 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:13,167 INFO L272 AbstractInterpreter]: Visited 16 different actions 72 times. Merged at 3 different actions 24 times. Widened at 1 different actions 6 times. Performed 108 root evaluator evaluations with a maximum evaluation depth of 12. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-20 13:26:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:13,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:13,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:13,173 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 13:26:13,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:13,202 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:13,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 13:26:13,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,284 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:13,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-20 13:26:13,326 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:13,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:26:13,331 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-09-20 13:26:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:13,383 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-09-20 13:26:13,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:26:13,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-20 13:26:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:13,385 INFO L225 Difference]: With dead ends: 33 [2019-09-20 13:26:13,385 INFO L226 Difference]: Without dead ends: 33 [2019-09-20 13:26:13,386 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:26:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-20 13:26:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-09-20 13:26:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-20 13:26:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-09-20 13:26:13,390 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2019-09-20 13:26:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:13,391 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-09-20 13:26:13,391 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-09-20 13:26:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:26:13,392 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:13,392 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:13,392 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2019-09-20 13:26:13,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:13,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:13,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:13,508 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:13,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:13,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:13,509 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2019-09-20 13:26:13,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:26:13,530 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-20 13:26:13,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 13:26:13,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:13,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 13:26:13,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,575 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:13,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-09-20 13:26:13,645 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:13,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:26:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:26:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:26:13,647 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-09-20 13:26:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:13,700 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-09-20 13:26:13,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:13,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-20 13:26:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:13,701 INFO L225 Difference]: With dead ends: 35 [2019-09-20 13:26:13,702 INFO L226 Difference]: Without dead ends: 35 [2019-09-20 13:26:13,702 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:26:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-20 13:26:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-09-20 13:26:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 13:26:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-20 13:26:13,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-09-20 13:26:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:13,707 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-20 13:26:13,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:26:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-20 13:26:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:26:13,708 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:13,709 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:13,709 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2019-09-20 13:26:13,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:13,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:26:13,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:13,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:13,817 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:13,817 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:13,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:13,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:13,817 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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) [2019-09-20 13:26:13,837 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 13:26:13,838 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:13,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 13:26:13,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:13,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 13:26:13,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:13,905 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:14,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:14,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-09-20 13:26:14,004 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:14,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:26:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:26:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:26:14,005 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-09-20 13:26:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:14,088 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-09-20 13:26:14,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:14,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-09-20 13:26:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:14,089 INFO L225 Difference]: With dead ends: 37 [2019-09-20 13:26:14,089 INFO L226 Difference]: Without dead ends: 37 [2019-09-20 13:26:14,090 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:26:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-20 13:26:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-09-20 13:26:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 13:26:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-20 13:26:14,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-09-20 13:26:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:14,097 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-20 13:26:14,097 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:26:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-20 13:26:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 13:26:14,106 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:14,106 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:14,106 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2019-09-20 13:26:14,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:14,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:14,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:26:14,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:14,111 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:14,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:14,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:14,251 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:14,251 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:14,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:14,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:14,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:14,276 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:14,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 13:26:14,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:14,338 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:14,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:14,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-20 13:26:14,460 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:14,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:26:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:26:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:26:14,461 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-09-20 13:26:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:14,543 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-09-20 13:26:14,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:26:14,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-09-20 13:26:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:14,545 INFO L225 Difference]: With dead ends: 39 [2019-09-20 13:26:14,545 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 13:26:14,546 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:26:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 13:26:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-09-20 13:26:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 13:26:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-20 13:26:14,550 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2019-09-20 13:26:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:14,551 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-20 13:26:14,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:26:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-20 13:26:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:26:14,552 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:14,552 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:14,552 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2019-09-20 13:26:14,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:14,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:14,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:14,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:14,555 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:14,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:14,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:14,675 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:14,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:14,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:14,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:14,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:26:14,695 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-20 13:26:14,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 13:26:14,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:14,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 13:26:14,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:14,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:14,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:14,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:14,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:14,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:18,136 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-09-20 13:26:18,542 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-09-20 13:26:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-20 13:26:18,547 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-20 13:26:25,470 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:25,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 18 [2019-09-20 13:26:25,471 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:25,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:26:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:26:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-09-20 13:26:25,472 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-09-20 13:26:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:27,992 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-20 13:26:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:26:27,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-20 13:26:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:27,994 INFO L225 Difference]: With dead ends: 36 [2019-09-20 13:26:27,994 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:27,995 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=90, Invalid=287, Unknown=3, NotChecked=0, Total=380 [2019-09-20 13:26:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:27,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-09-20 13:26:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:27,996 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:27,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:26:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:27,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:28,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:28 BoogieIcfgContainer [2019-09-20 13:26:28,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:28,008 INFO L168 Benchmark]: Toolchain (without parser) took 16611.70 ms. Allocated memory was 130.5 MB in the beginning and 270.0 MB in the end (delta: 139.5 MB). Free memory was 86.5 MB in the beginning and 180.0 MB in the end (delta: -93.5 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,009 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 130.5 MB. Free memory was 104.7 MB in the beginning and 104.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.67 ms. Allocated memory is still 130.5 MB. Free memory was 86.3 MB in the beginning and 76.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,011 INFO L168 Benchmark]: Boogie Preprocessor took 120.38 ms. Allocated memory was 130.5 MB in the beginning and 198.2 MB in the end (delta: 67.6 MB). Free memory was 76.7 MB in the beginning and 174.4 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,012 INFO L168 Benchmark]: RCFGBuilder took 295.96 ms. Allocated memory is still 198.2 MB. Free memory was 174.4 MB in the beginning and 160.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,012 INFO L168 Benchmark]: TraceAbstraction took 15950.30 ms. Allocated memory was 198.2 MB in the beginning and 270.0 MB in the end (delta: 71.8 MB). Free memory was 160.0 MB in the beginning and 180.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:28,017 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 130.5 MB. Free memory was 104.7 MB in the beginning and 104.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.67 ms. Allocated memory is still 130.5 MB. Free memory was 86.3 MB in the beginning and 76.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.38 ms. Allocated memory was 130.5 MB in the beginning and 198.2 MB in the end (delta: 67.6 MB). Free memory was 76.7 MB in the beginning and 174.4 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.96 ms. Allocated memory is still 198.2 MB. Free memory was 174.4 MB in the beginning and 160.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15950.30 ms. Allocated memory was 198.2 MB in the beginning and 270.0 MB in the end (delta: 71.8 MB). Free memory was 160.0 MB in the beginning and 180.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 15.8s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 87 SDslu, 486 SDs, 0 SdLazy, 201 SolverSat, 22 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 228 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 311 ConstructedInterpolants, 2 QuantifiedInterpolants, 18538 SizeOfPredicates, 7 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...