/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:17:35,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:17:35,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:17:35,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:17:35,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:17:35,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:17:35,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:17:35,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:17:35,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:17:35,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:17:35,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:17:35,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:17:35,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:17:35,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:17:35,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:17:35,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:17:35,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:17:35,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:17:35,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:17:35,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:17:35,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:17:35,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:17:35,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:17:35,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:17:35,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:17:35,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:17:35,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:17:35,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:17:35,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:17:35,119 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:17:35,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:17:35,122 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:17:35,123 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:17:35,123 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:17:35,123 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:17:35,123 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:17:35,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:17:35,124 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:17:35,124 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:17:35,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:17:35,124 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:17:35,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:17:35,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:17:35,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:17:35,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:17:35,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:17:35,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:17:35,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:17:35,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:17:35,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:17:35,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:17:35,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:17:35,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:17:35,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:17:35,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:17:35,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:17:35,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:17:35,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:17:35,131 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:17:35,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:17:35,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:17:35,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:17:35,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:17:35,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:17:35,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2019-11-24 04:17:35,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/027f3148a/302753692860451f8615fba2b1be1cb7/FLAG511ec55e5 [2019-11-24 04:17:35,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:17:35,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2019-11-24 04:17:35,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/027f3148a/302753692860451f8615fba2b1be1cb7/FLAG511ec55e5 [2019-11-24 04:17:36,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/027f3148a/302753692860451f8615fba2b1be1cb7 [2019-11-24 04:17:36,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:17:36,337 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:17:36,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:17:36,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:17:36,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:17:36,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548af951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36, skipping insertion in model container [2019-11-24 04:17:36,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:17:36,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:17:36,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:17:36,600 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:17:36,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:17:36,637 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:17:36,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36 WrapperNode [2019-11-24 04:17:36,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:17:36,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:17:36,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:17:36,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:17:36,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:17:36,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:17:36,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:17:36,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:17:36,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... [2019-11-24 04:17:36,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:17:36,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:17:36,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:17:36,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:17:36,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:17:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:17:36,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:17:37,229 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:17:37,229 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:17:37,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:17:37 BoogieIcfgContainer [2019-11-24 04:17:37,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:17:37,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:17:37,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:17:37,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:17:37,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:17:36" (1/3) ... [2019-11-24 04:17:37,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3da01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:17:37, skipping insertion in model container [2019-11-24 04:17:37,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:36" (2/3) ... [2019-11-24 04:17:37,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3da01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:17:37, skipping insertion in model container [2019-11-24 04:17:37,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:17:37" (3/3) ... [2019-11-24 04:17:37,240 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-3.c [2019-11-24 04:17:37,250 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:17:37,258 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:17:37,270 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:17:37,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:17:37,297 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:17:37,297 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:17:37,297 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:17:37,297 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:17:37,297 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:17:37,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:17:37,298 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:17:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-24 04:17:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:17:37,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:17:37,319 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:17:37,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:17:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:17:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash 82587860, now seen corresponding path program 1 times [2019-11-24 04:17:37,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:17:37,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169873849] [2019-11-24 04:17:37,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:17:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:37,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169873849] [2019-11-24 04:17:37,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:17:37,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:17:37,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634335475] [2019-11-24 04:17:37,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:17:37,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:17:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:17:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:17:37,504 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-24 04:17:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:17:37,559 INFO L93 Difference]: Finished difference Result 14 states and 21 transitions. [2019-11-24 04:17:37,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:17:37,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-24 04:17:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:17:37,572 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:17:37,572 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:17:37,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:17:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:17:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-24 04:17:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:17:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-24 04:17:37,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2019-11-24 04:17:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:17:37,619 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-24 04:17:37,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:17:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-24 04:17:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:17:37,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:17:37,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:17:37,621 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:17:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:17:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1734840712, now seen corresponding path program 1 times [2019-11-24 04:17:37,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:17:37,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612811058] [2019-11-24 04:17:37,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:17:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:37,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612811058] [2019-11-24 04:17:37,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894763136] [2019-11-24 04:17:37,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:17:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:17:37,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:17:37,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:17:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:37,783 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:17:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:17:37,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812964414] [2019-11-24 04:17:37,832 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 04:17:37,832 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:17:37,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:17:37,846 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:17:37,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:17:38,713 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 183 [2019-11-24 04:17:38,894 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 166 [2019-11-24 04:17:39,197 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 249 [2019-11-24 04:17:39,478 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2019-11-24 04:17:39,887 WARN L192 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 392 [2019-11-24 04:17:40,382 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 381 [2019-11-24 04:17:41,106 WARN L192 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 617 [2019-11-24 04:17:42,165 WARN L192 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 595 [2019-11-24 04:17:43,651 WARN L192 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 597 [2019-11-24 04:17:44,230 WARN L192 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 597 [2019-11-24 04:17:45,897 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 908 DAG size of output: 900 [2019-11-24 04:17:47,698 WARN L192 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 885 DAG size of output: 880 [2019-11-24 04:17:50,363 WARN L192 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 1376 DAG size of output: 1366 [2019-11-24 04:17:54,657 WARN L192 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1363 DAG size of output: 1353 [2019-11-24 04:17:59,412 WARN L192 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 2115 DAG size of output: 2098 [2019-11-24 04:18:09,465 WARN L192 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 2095 DAG size of output: 2088 [2019-11-24 04:18:20,769 WARN L192 SmtUtils]: Spent 10.63 s on a formula simplification. DAG size of input: 3410 DAG size of output: 3374 [2019-11-24 04:18:26,732 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6511 conjuctions. This might take some time... [2019-11-24 04:18:37,293 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7733 conjuctions. This might take some time... [2019-11-24 04:18:45,905 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12088 conjuctions. This might take some time... [2019-11-24 04:19:10,509 WARN L192 SmtUtils]: Spent 9.85 s on a formula simplification. DAG size of input: 3365 DAG size of output: 3342