/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/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:43:08,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:43:08,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:43:08,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 05:43:08,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:43:08,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:43:08,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:43:08,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:43:08,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:43:08,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:43:08,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:43:08,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:43:08,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:43:08,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:43:08,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:43:08,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:43:08,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:43:08,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:43:08,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:43:08,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:43:08,971 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 05:43:08,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:43:08,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:43:08,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:43:08,987 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:43:08,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:43:08,988 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:43:08,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:43:08,988 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:43:08,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:43:08,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:43:08,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:43:08,989 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:43:08,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:43:08,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:43:08,990 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:43:08,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:43:08,990 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:43:08,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:43:08,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:43:08,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:43:08,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:43:08,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:43:08,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:43:08,992 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:43:08,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:43:08,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:43:08,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:43:08,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:43:08,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:43:08,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:43:08,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:43:08,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:43:08,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:43:09,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:43:09,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:43:09,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:43:09,297 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:43:09,298 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:43:09,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-24 05:43:09,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f993d090a/759d7740dcfe481cafa2447e89fce8f4/FLAG886321fbb [2019-11-24 05:43:09,838 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:43:09,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-24 05:43:09,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f993d090a/759d7740dcfe481cafa2447e89fce8f4/FLAG886321fbb [2019-11-24 05:43:10,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f993d090a/759d7740dcfe481cafa2447e89fce8f4 [2019-11-24 05:43:10,225 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:43:10,226 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:43:10,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:43:10,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:43:10,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:43:10,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fec71d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10, skipping insertion in model container [2019-11-24 05:43:10,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:43:10,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:43:10,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:43:10,444 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:43:10,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:43:10,485 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:43:10,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10 WrapperNode [2019-11-24 05:43:10,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:43:10,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:43:10,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:43:10,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:43:10,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:43:10,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:43:10,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:43:10,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:43:10,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:43:10,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:43:10,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:43:10,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:43:10,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (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 05:43:10,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:43:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:43:10,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:43:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:43:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:43:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:43:11,339 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:43:11,339 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:43:11,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:43:11 BoogieIcfgContainer [2019-11-24 05:43:11,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:43:11,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:43:11,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:43:11,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:43:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:43:10" (1/3) ... [2019-11-24 05:43:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c85f0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:43:11, skipping insertion in model container [2019-11-24 05:43:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10" (2/3) ... [2019-11-24 05:43:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c85f0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:43:11, skipping insertion in model container [2019-11-24 05:43:11,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:43:11" (3/3) ... [2019-11-24 05:43:11,349 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-11-24 05:43:11,360 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:43:11,367 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:43:11,379 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:43:11,402 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:43:11,403 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:43:11,403 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:43:11,403 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:43:11,403 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:43:11,403 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:43:11,404 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:43:11,404 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:43:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:43:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:43:11,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:11,421 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:11,421 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1115299327, now seen corresponding path program 1 times [2019-11-24 05:43:11,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:11,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732123878] [2019-11-24 05:43:11,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:11,574 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 05:43:11,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732123878] [2019-11-24 05:43:11,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:43:11,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:43:11,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023609886] [2019-11-24 05:43:11,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:43:11,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:43:11,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:43:11,597 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:43:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:11,627 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:43:11,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:43:11,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:43:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:11,639 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:43:11,640 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:43:11,643 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 05:43:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:43:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:43:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:43:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:43:11,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:43:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:11,678 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:43:11,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:43:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:43:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:43:11,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:11,679 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:11,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1991853340, now seen corresponding path program 1 times [2019-11-24 05:43:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:11,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653583801] [2019-11-24 05:43:11,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:11,757 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 05:43:11,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653583801] [2019-11-24 05:43:11,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3186647] [2019-11-24 05:43:11,758 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 05:43:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:11,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:43:11,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:11,861 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 05:43:11,861 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:11,877 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 05:43:11,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:43:11,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:43:11,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219958116] [2019-11-24 05:43:11,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:43:11,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:43:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:43:11,882 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:43:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:11,935 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:43:11,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:43:11,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:43:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:11,936 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:43:11,936 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:43:11,938 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 05:43:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:43:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:43:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:43:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:43:11,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:43:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:11,943 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:43:11,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:43:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:43:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:43:11,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:11,945 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:12,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:43:12,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1952849532, now seen corresponding path program 1 times [2019-11-24 05:43:12,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:12,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763842832] [2019-11-24 05:43:12,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,210 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 05:43:12,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763842832] [2019-11-24 05:43:12,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052701473] [2019-11-24 05:43:12,214 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 05:43:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:43:12,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:12,311 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 05:43:12,312 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:12,323 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 05:43:12,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:43:12,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:43:12,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643661327] [2019-11-24 05:43:12,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:43:12,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:43:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:43:12,325 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:43:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:12,344 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:43:12,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:43:12,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:43:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:12,346 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:43:12,346 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:43:12,347 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 05:43:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:43:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:43:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:43:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:43:12,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:43:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:12,352 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:43:12,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:43:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:43:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:43:12,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:12,353 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:12,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:43:12,557 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1248077028, now seen corresponding path program 1 times [2019-11-24 05:43:12,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:12,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659994131] [2019-11-24 05:43:12,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,637 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 05:43:12,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659994131] [2019-11-24 05:43:12,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86731666] [2019-11-24 05:43:12,638 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 05:43:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:43:12,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:12,727 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 05:43:12,727 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:12,752 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 05:43:12,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925164905] [2019-11-24 05:43:12,800 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:43:12,800 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:43:12,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:43:12,819 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:43:12,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:43:23,758 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 226 [2019-11-24 05:43:23,986 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 235 [2019-11-24 05:43:24,205 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 274 [2019-11-24 05:43:24,737 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2019-11-24 05:43:25,060 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 332 [2019-11-24 05:43:30,388 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 325 [2019-11-24 05:43:30,731 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 452 [2019-11-24 05:43:37,719 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11600 conjuctions. This might take some time... [2019-11-24 05:43:47,777 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11600 conjuctions. This might take some time... [2019-11-24 05:44:07,234 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 14500 conjuctions. This might take some time... [2019-11-24 05:44:22,424 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 16107 conjuctions. This might take some time...