/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/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:42:56,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:42:56,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:42:56,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 05:42:56,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:42:56,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:42:56,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:42:56,173 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 05:42:56,193 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:42:56,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:42:56,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:42:56,194 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:42:56,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:42:56,195 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:42:56,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:42:56,195 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:42:56,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:42:56,195 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:42:56,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:42:56,196 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:42:56,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:42:56,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:42:56,196 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:42:56,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:42:56,197 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:42:56,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:42:56,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:42:56,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:42:56,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:42:56,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:42:56,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:42:56,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:42:56,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:42:56,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:42:56,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:42:56,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:42:56,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:42:56,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:42:56,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:42:56,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:42:56,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:42:56,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:42:56,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:42:56,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:42:56,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:42:56,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:42:56,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:42:56,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:42:56,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:42:56,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:42:56,501 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:42:56,501 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-24 05:42:56,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd662f9b/2b102e51191e4aa0805ec43941a3d2df/FLAGab105a884 [2019-11-24 05:42:57,000 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:42:57,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-24 05:42:57,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd662f9b/2b102e51191e4aa0805ec43941a3d2df/FLAGab105a884 [2019-11-24 05:42:57,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dd662f9b/2b102e51191e4aa0805ec43941a3d2df [2019-11-24 05:42:57,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:42:57,414 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:42:57,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:42:57,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:42:57,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:42:57,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55caf869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57, skipping insertion in model container [2019-11-24 05:42:57,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:42:57,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:42:57,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:42:57,663 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:42:57,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:42:57,700 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:42:57,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57 WrapperNode [2019-11-24 05:42:57,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:42:57,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:42:57,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:42:57,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:42:57,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:42:57,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:42:57,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:42:57,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:42:57,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (1/1) ... [2019-11-24 05:42:57,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:42:57,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:42:57,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:42:57,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:42:57,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (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 05:42:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:42:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:42:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:42:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:42:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:42:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:42:58,528 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:42:58,528 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:42:58,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:58 BoogieIcfgContainer [2019-11-24 05:42:58,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:42:58,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:42:58,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:42:58,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:42:58,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:42:57" (1/3) ... [2019-11-24 05:42:58,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1145cf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:42:58, skipping insertion in model container [2019-11-24 05:42:58,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:57" (2/3) ... [2019-11-24 05:42:58,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1145cf1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:42:58, skipping insertion in model container [2019-11-24 05:42:58,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:58" (3/3) ... [2019-11-24 05:42:58,539 INFO L109 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2019-11-24 05:42:58,549 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:42:58,556 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:42:58,568 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:42:58,588 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:42:58,589 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:42:58,589 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:42:58,589 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:42:58,589 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:42:58,589 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:42:58,590 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:42:58,590 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:42:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:42:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:42:58,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:58,608 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:58,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1115299327, now seen corresponding path program 1 times [2019-11-24 05:42:58,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:58,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877031020] [2019-11-24 05:42:58,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:58,767 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 05:42:58,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877031020] [2019-11-24 05:42:58,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:42:58,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:42:58,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755801478] [2019-11-24 05:42:58,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:42:58,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:42:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:42:58,793 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:42:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:58,831 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:42:58,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:42:58,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:42:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:58,842 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:42:58,842 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:42:58,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:42:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:42:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:42:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:42:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:42:58,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:42:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:58,879 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:42:58,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:42:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:42:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:42:58,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:58,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:58,880 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1991853340, now seen corresponding path program 1 times [2019-11-24 05:42:58,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:58,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400445671] [2019-11-24 05:42:58,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:58,948 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 05:42:58,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400445671] [2019-11-24 05:42:58,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228726127] [2019-11-24 05:42:58,949 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 05:42:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:42:59,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:42:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:42:59,066 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:42:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:42:59,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:42:59,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:42:59,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715912228] [2019-11-24 05:42:59,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:42:59,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:42:59,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,089 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:42:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:59,143 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:42:59,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:42:59,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:42:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:59,144 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:42:59,144 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:42:59,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:42:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:42:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:42:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:42:59,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:42:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:59,151 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:42:59,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:42:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:42:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:42:59,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:59,152 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:59,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,354 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1952849532, now seen corresponding path program 1 times [2019-11-24 05:42:59,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:59,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834323844] [2019-11-24 05:42:59,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 05:42:59,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834323844] [2019-11-24 05:42:59,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504689337] [2019-11-24 05:42:59,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:42:59,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:42:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:42:59,552 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:42:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:42:59,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:42:59,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:42:59,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928091271] [2019-11-24 05:42:59,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:42:59,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:42:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:42:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,570 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:42:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:42:59,587 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:42:59,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:42:59,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:42:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:42:59,589 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:42:59,590 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:42:59,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:42:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:42:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:42:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:42:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:42:59,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:42:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:42:59,599 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:42:59,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:42:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:42:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:42:59,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:42:59,601 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:42:59,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:42:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:42:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1248077028, now seen corresponding path program 1 times [2019-11-24 05:42:59,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:42:59,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471458188] [2019-11-24 05:42:59,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:42:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:42:59,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471458188] [2019-11-24 05:42:59,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339160726] [2019-11-24 05:42:59,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:42:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:42:59,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:42:59,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:42:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:42:59,937 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:42:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:42:59,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834676262] [2019-11-24 05:43:00,010 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:43:00,010 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:43:00,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:43:00,030 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:43:00,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:43:01,813 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 05:43:03,224 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 327 [2019-11-24 05:43:05,719 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 304 [2019-11-24 05:43:06,111 WARN L192 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 523 [2019-11-24 05:43:10,994 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8005 conjuctions. This might take some time... [2019-11-24 05:43:16,555 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7997 conjuctions. This might take some time... [2019-11-24 05:43:25,213 WARN L192 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 496