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/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:58,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:58,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:58,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:58,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:58,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:58,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:58,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:58,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:58,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:58,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:58,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:58,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:58,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:58,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:58,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:58,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:58,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:58,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:58,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:58,711 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 13:25:58,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:58,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:58,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:58,727 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:58,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:58,728 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:58,728 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:58,728 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:58,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:58,729 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:58,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:58,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:58,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:58,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:58,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:58,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:58,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:58,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:58,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:58,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:58,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:58,732 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:58,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:58,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:58,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:58,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:58,733 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:58,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:58,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:58,733 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:58,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:58,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:58,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:58,785 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:58,786 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:58,786 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-09-20 13:25:58,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80f539bb/7bf2d17436014188950869cba5942322/FLAGd86428c5c [2019-09-20 13:25:59,398 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:59,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-09-20 13:25:59,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80f539bb/7bf2d17436014188950869cba5942322/FLAGd86428c5c [2019-09-20 13:25:59,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80f539bb/7bf2d17436014188950869cba5942322 [2019-09-20 13:25:59,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:59,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:59,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:59,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:59,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:59,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5097dd39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59, skipping insertion in model container [2019-09-20 13:25:59,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:59,789 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:00,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:00,174 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:00,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:00,260 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:00,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00 WrapperNode [2019-09-20 13:26:00,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:00,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:00,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:00,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:00,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (1/1) ... [2019-09-20 13:26:00,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:00,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:00,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:00,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:00,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (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 13:26:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:00,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2019-09-20 13:26:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-09-20 13:26:00,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:26:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:26:00,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:26:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:26:00,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:26:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:26:00,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:26:01,191 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:01,192 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-20 13:26:01,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:01 BoogieIcfgContainer [2019-09-20 13:26:01,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:01,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:01,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:01,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:01,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:59" (1/3) ... [2019-09-20 13:26:01,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec15b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:01, skipping insertion in model container [2019-09-20 13:26:01,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:00" (2/3) ... [2019-09-20 13:26:01,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec15b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:01, skipping insertion in model container [2019-09-20 13:26:01,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:01" (3/3) ... [2019-09-20 13:26:01,206 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2019-09-20 13:26:01,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:01,227 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:01,244 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:01,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:01,274 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:01,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:01,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:01,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:01,275 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:01,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:01,276 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 13:26:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:26:01,304 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:01,305 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:01,307 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2019-09-20 13:26:01,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:01,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:01,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,383 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,710 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 13:26:01,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:01,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:26:01,713 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:01,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:26:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:26:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:26:01,734 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-09-20 13:26:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:01,794 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-09-20 13:26:01,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:26:01,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-20 13:26:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:01,805 INFO L225 Difference]: With dead ends: 34 [2019-09-20 13:26:01,806 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 13:26:01,807 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 13:26:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2019-09-20 13:26:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-20 13:26:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-20 13:26:01,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-20 13:26:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:01,843 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-20 13:26:01,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:26:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-20 13:26:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:26:01,844 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:01,844 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:01,844 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2019-09-20 13:26:01,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,848 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,939 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 13:26:01,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:01,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:26:01,940 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:01,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:26:01,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:26:01,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:26:01,943 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-09-20 13:26:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:01,975 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-09-20 13:26:01,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:01,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-20 13:26:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:01,978 INFO L225 Difference]: With dead ends: 26 [2019-09-20 13:26:01,978 INFO L226 Difference]: Without dead ends: 26 [2019-09-20 13:26:01,979 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-20 13:26:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2019-09-20 13:26:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 13:26:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-20 13:26:01,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-09-20 13:26:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:01,985 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-20 13:26:01,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:26:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-20 13:26:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 13:26:01,987 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:01,987 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:01,988 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:01,988 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2019-09-20 13:26:01,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:01,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:01,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,992 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:02,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:02,166 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:02,167 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-20 13:26:02,168 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [12], [14], [17], [18], [20], [23], [26], [30], [31], [35], [36], [37] [2019-09-20 13:26:02,225 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:02,226 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:02,329 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:26:02,330 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 32 variables. [2019-09-20 13:26:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:02,334 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:26:02,359 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-20 13:26:02,359 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:26:02,360 INFO L420 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2019-09-20 13:26:02,361 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:26:02,362 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:02,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2019-09-20 13:26:02,362 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:02,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:02,363 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 2 states. [2019-09-20 13:26:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:02,364 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-20 13:26:02,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:02,364 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-20 13:26:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:02,364 INFO L225 Difference]: With dead ends: 2 [2019-09-20 13:26:02,365 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:02,365 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 13:26:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:02,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-20 13:26:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:02,366 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:02,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:02,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:02,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:02 BoogieIcfgContainer [2019-09-20 13:26:02,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:02,379 INFO L168 Benchmark]: Toolchain (without parser) took 2632.35 ms. Allocated memory was 132.6 MB in the beginning and 222.8 MB in the end (delta: 90.2 MB). Free memory was 88.0 MB in the beginning and 131.7 MB in the end (delta: -43.7 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,380 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.87 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 87.8 MB in the beginning and 168.0 MB in the end (delta: -80.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,385 INFO L168 Benchmark]: Boogie Preprocessor took 76.83 ms. Allocated memory is still 198.7 MB. Free memory was 168.0 MB in the beginning and 163.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,386 INFO L168 Benchmark]: RCFGBuilder took 856.56 ms. Allocated memory is still 198.7 MB. Free memory was 163.8 MB in the beginning and 91.5 MB in the end (delta: 72.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,387 INFO L168 Benchmark]: TraceAbstraction took 1177.17 ms. Allocated memory was 198.7 MB in the beginning and 222.8 MB in the end (delta: 24.1 MB). Free memory was 91.5 MB in the beginning and 131.7 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 13:26:02,391 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 516.87 ms. Allocated memory was 132.6 MB in the beginning and 198.7 MB in the end (delta: 66.1 MB). Free memory was 87.8 MB in the beginning and 168.0 MB in the end (delta: -80.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.83 ms. Allocated memory is still 198.7 MB. Free memory was 168.0 MB in the beginning and 163.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 856.56 ms. Allocated memory is still 198.7 MB. Free memory was 163.8 MB in the beginning and 91.5 MB in the end (delta: 72.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1177.17 ms. Allocated memory was 198.7 MB in the beginning and 222.8 MB in the end (delta: 24.1 MB). Free memory was 91.5 MB in the beginning and 131.7 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 191]: 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 3 procedures, 19 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 32 SDslu, 54 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 10.333333333333334 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1416 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...