/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/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:13:34,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:13:34,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:13:34,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:13:34,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:13:34,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:13:34,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:13:34,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:13:34,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:13:34,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:13:34,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:13:34,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:13:34,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:13:34,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:13:34,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:13:34,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:13:34,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:13:34,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:13:34,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:13:34,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:13:34,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:13:34,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:13:34,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:13:34,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:13:34,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:13:34,861 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 04:13:34,880 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:13:34,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:13:34,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:13:34,882 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:13:34,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:13:34,882 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:13:34,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:13:34,883 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:13:34,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:13:34,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:13:34,884 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:13:34,884 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:13:34,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:13:34,885 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:13:34,885 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:13:34,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:13:34,887 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:13:34,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:13:34,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:13:34,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:13:34,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:13:34,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:13:34,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:13:34,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:13:34,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:13:34,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:13:34,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:13:34,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:13:34,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:13:34,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:13:34,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:13:34,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:13:34,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:13:34,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:13:34,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:13:34,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:13:34,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:13:34,893 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:13:35,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:13:35,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:13:35,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:13:35,169 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:13:35,170 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:13:35,170 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2019-11-24 04:13:35,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f083afcb/fafb9073d540401f89eada4081dde45d/FLAG751043294 [2019-11-24 04:13:35,722 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:13:35,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2019-11-24 04:13:35,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f083afcb/fafb9073d540401f89eada4081dde45d/FLAG751043294 [2019-11-24 04:13:36,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f083afcb/fafb9073d540401f89eada4081dde45d [2019-11-24 04:13:36,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:13:36,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:13:36,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:36,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:13:36,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:13:36,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672436ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36, skipping insertion in model container [2019-11-24 04:13:36,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:13:36,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:13:36,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:36,460 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:13:36,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:36,525 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:13:36,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36 WrapperNode [2019-11-24 04:13:36,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:36,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:36,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:13:36,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:13:36,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:36,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:13:36,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:13:36,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:13:36,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (1/1) ... [2019-11-24 04:13:36,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:13:36,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:13:36,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:13:36,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:13:36,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (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 04:13:36,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:13:36,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:13:37,168 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:13:37,169 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-24 04:13:37,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:37 BoogieIcfgContainer [2019-11-24 04:13:37,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:13:37,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:13:37,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:13:37,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:13:37,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:13:36" (1/3) ... [2019-11-24 04:13:37,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdce3bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:37, skipping insertion in model container [2019-11-24 04:13:37,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:36" (2/3) ... [2019-11-24 04:13:37,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdce3bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:37, skipping insertion in model container [2019-11-24 04:13:37,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:37" (3/3) ... [2019-11-24 04:13:37,179 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2019-11-24 04:13:37,189 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:13:37,198 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:13:37,208 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:13:37,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:13:37,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:13:37,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:13:37,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:13:37,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:13:37,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:13:37,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:13:37,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:13:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-24 04:13:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:13:37,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:37,251 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:13:37,252 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash 930194355, now seen corresponding path program 1 times [2019-11-24 04:13:37,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:37,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906789556] [2019-11-24 04:13:37,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:37,437 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 04:13:37,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906789556] [2019-11-24 04:13:37,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:37,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:37,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001286706] [2019-11-24 04:13:37,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:37,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:37,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,458 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-24 04:13:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:37,507 INFO L93 Difference]: Finished difference Result 46 states and 73 transitions. [2019-11-24 04:13:37,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:37,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:13:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:37,520 INFO L225 Difference]: With dead ends: 46 [2019-11-24 04:13:37,521 INFO L226 Difference]: Without dead ends: 35 [2019-11-24 04:13:37,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-24 04:13:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2019-11-24 04:13:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2019-11-24 04:13:37,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 6 [2019-11-24 04:13:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:37,562 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 31 transitions. [2019-11-24 04:13:37,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 31 transitions. [2019-11-24 04:13:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:13:37,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:37,563 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:37,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1228531748, now seen corresponding path program 1 times [2019-11-24 04:13:37,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:37,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69630507] [2019-11-24 04:13:37,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:37,642 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 04:13:37,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69630507] [2019-11-24 04:13:37,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:37,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:37,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544679563] [2019-11-24 04:13:37,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:37,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:37,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,648 INFO L87 Difference]: Start difference. First operand 19 states and 31 transitions. Second operand 4 states. [2019-11-24 04:13:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:37,690 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2019-11-24 04:13:37,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:37,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:13:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:37,693 INFO L225 Difference]: With dead ends: 35 [2019-11-24 04:13:37,693 INFO L226 Difference]: Without dead ends: 33 [2019-11-24 04:13:37,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-24 04:13:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2019-11-24 04:13:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2019-11-24 04:13:37,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 7 [2019-11-24 04:13:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:37,706 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2019-11-24 04:13:37,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2019-11-24 04:13:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:13:37,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:37,707 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:37,708 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 570436136, now seen corresponding path program 1 times [2019-11-24 04:13:37,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:37,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193270708] [2019-11-24 04:13:37,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:37,810 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 04:13:37,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193270708] [2019-11-24 04:13:37,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:37,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:37,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044209090] [2019-11-24 04:13:37,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:37,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,815 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2019-11-24 04:13:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:37,843 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2019-11-24 04:13:37,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:37,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:13:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:37,845 INFO L225 Difference]: With dead ends: 33 [2019-11-24 04:13:37,845 INFO L226 Difference]: Without dead ends: 31 [2019-11-24 04:13:37,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-24 04:13:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2019-11-24 04:13:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2019-11-24 04:13:37,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 8 [2019-11-24 04:13:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:37,855 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2019-11-24 04:13:37,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2019-11-24 04:13:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:13:37,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:37,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:37,857 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 503866033, now seen corresponding path program 1 times [2019-11-24 04:13:37,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:37,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606259671] [2019-11-24 04:13:37,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:37,927 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 04:13:37,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606259671] [2019-11-24 04:13:37,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:37,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:37,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155192883] [2019-11-24 04:13:37,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:37,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,929 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand 4 states. [2019-11-24 04:13:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:37,954 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2019-11-24 04:13:37,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:37,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 04:13:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:37,955 INFO L225 Difference]: With dead ends: 31 [2019-11-24 04:13:37,955 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:13:37,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:13:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2019-11-24 04:13:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2019-11-24 04:13:37,960 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 9 [2019-11-24 04:13:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:37,960 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2019-11-24 04:13:37,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2019-11-24 04:13:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:13:37,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:37,962 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:37,962 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1559806819, now seen corresponding path program 1 times [2019-11-24 04:13:37,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:37,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168089147] [2019-11-24 04:13:37,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:38,005 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 04:13:38,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168089147] [2019-11-24 04:13:38,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:38,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:38,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318715137] [2019-11-24 04:13:38,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:38,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,009 INFO L87 Difference]: Start difference. First operand 19 states and 28 transitions. Second operand 4 states. [2019-11-24 04:13:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:38,029 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2019-11-24 04:13:38,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:38,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-24 04:13:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:38,031 INFO L225 Difference]: With dead ends: 29 [2019-11-24 04:13:38,031 INFO L226 Difference]: Without dead ends: 27 [2019-11-24 04:13:38,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-24 04:13:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-11-24 04:13:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2019-11-24 04:13:38,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 10 [2019-11-24 04:13:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:38,036 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2019-11-24 04:13:38,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2019-11-24 04:13:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:13:38,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:38,038 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:38,038 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1109155450, now seen corresponding path program 1 times [2019-11-24 04:13:38,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:38,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948701266] [2019-11-24 04:13:38,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:38,080 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 04:13:38,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948701266] [2019-11-24 04:13:38,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:38,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:38,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602172370] [2019-11-24 04:13:38,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:38,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,083 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2019-11-24 04:13:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:38,108 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-24 04:13:38,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:38,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-24 04:13:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:38,110 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:13:38,110 INFO L226 Difference]: Without dead ends: 25 [2019-11-24 04:13:38,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-24 04:13:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2019-11-24 04:13:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:13:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2019-11-24 04:13:38,114 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 11 [2019-11-24 04:13:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:38,115 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2019-11-24 04:13:38,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2019-11-24 04:13:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:13:38,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:38,116 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:38,116 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -23864558, now seen corresponding path program 1 times [2019-11-24 04:13:38,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:38,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310829208] [2019-11-24 04:13:38,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:38,162 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 04:13:38,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310829208] [2019-11-24 04:13:38,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:38,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:38,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468660190] [2019-11-24 04:13:38,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:38,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,165 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 4 states. [2019-11-24 04:13:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:38,186 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2019-11-24 04:13:38,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:38,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-24 04:13:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:38,188 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:13:38,188 INFO L226 Difference]: Without dead ends: 0 [2019-11-24 04:13:38,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-24 04:13:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-24 04:13:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-24 04:13:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-24 04:13:38,190 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-11-24 04:13:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:38,190 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-24 04:13:38,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-24 04:13:38,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-24 04:13:38,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-24 04:13:38,211 INFO L444 ceAbstractionStarter]: For program point L102(line 102) no Hoare annotation was computed. [2019-11-24 04:13:38,211 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-24 04:13:38,211 INFO L444 ceAbstractionStarter]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,212 INFO L447 ceAbstractionStarter]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2019-11-24 04:13:38,212 INFO L447 ceAbstractionStarter]: At program point L120(lines 4 121) the Hoare annotation is: true [2019-11-24 04:13:38,212 INFO L444 ceAbstractionStarter]: For program point L87(line 87) no Hoare annotation was computed. [2019-11-24 04:13:38,212 INFO L444 ceAbstractionStarter]: For program point L112(line 112) no Hoare annotation was computed. [2019-11-24 04:13:38,212 INFO L440 ceAbstractionStarter]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point L97(line 97) no Hoare annotation was computed. [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point L32(lines 32 34) no Hoare annotation was computed. [2019-11-24 04:13:38,213 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point L82(line 82) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point L107(line 107) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,214 INFO L444 ceAbstractionStarter]: For program point L92(line 92) no Hoare annotation was computed. [2019-11-24 04:13:38,215 INFO L447 ceAbstractionStarter]: At program point L117(lines 5 121) the Hoare annotation is: true [2019-11-24 04:13:38,215 INFO L444 ceAbstractionStarter]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2019-11-24 04:13:38,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 04:13:38 BoogieIcfgContainer [2019-11-24 04:13:38,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 04:13:38,227 INFO L168 Benchmark]: Toolchain (without parser) took 2003.27 ms. Allocated memory was 140.0 MB in the beginning and 222.3 MB in the end (delta: 82.3 MB). Free memory was 104.6 MB in the beginning and 110.4 MB in the end (delta: -5.8 MB). Peak memory consumption was 76.5 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,228 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.84 ms. Allocated memory was 140.0 MB in the beginning and 166.2 MB in the end (delta: 26.2 MB). Free memory was 104.4 MB in the beginning and 144.2 MB in the end (delta: -39.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,230 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.04 ms. Allocated memory was 166.2 MB in the beginning and 222.3 MB in the end (delta: 56.1 MB). Free memory was 144.2 MB in the beginning and 208.7 MB in the end (delta: -64.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,231 INFO L168 Benchmark]: Boogie Preprocessor took 38.06 ms. Allocated memory is still 222.3 MB. Free memory was 208.7 MB in the beginning and 206.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,231 INFO L168 Benchmark]: RCFGBuilder took 506.05 ms. Allocated memory is still 222.3 MB. Free memory was 206.4 MB in the beginning and 180.2 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,232 INFO L168 Benchmark]: TraceAbstraction took 1053.01 ms. Allocated memory is still 222.3 MB. Free memory was 179.3 MB in the beginning and 110.4 MB in the end (delta: 68.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2019-11-24 04:13:38,240 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.84 ms. Allocated memory was 140.0 MB in the beginning and 166.2 MB in the end (delta: 26.2 MB). Free memory was 104.4 MB in the beginning and 144.2 MB in the end (delta: -39.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 99.04 ms. Allocated memory was 166.2 MB in the beginning and 222.3 MB in the end (delta: 56.1 MB). Free memory was 144.2 MB in the beginning and 208.7 MB in the end (delta: -64.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.06 ms. Allocated memory is still 222.3 MB. Free memory was 208.7 MB in the beginning and 206.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.05 ms. Allocated memory is still 222.3 MB. Free memory was 206.4 MB in the beginning and 180.2 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1053.01 ms. Allocated memory is still 222.3 MB. Free memory was 179.3 MB in the beginning and 110.4 MB in the end (delta: 68.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 0.9s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 156 SDslu, 263 SDs, 0 SdLazy, 63 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 2100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...