/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/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:41:27,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:41:27,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:41:27,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 05:41:27,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:41:27,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:41:27,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:41:27,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:41:27,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:41:27,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:41:27,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:41:27,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:41:27,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:41:27,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:41:27,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:41:27,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:41:27,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:41:27,697 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 05:41:27,730 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:41:27,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:41:27,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:41:27,737 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:41:27,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:41:27,737 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:41:27,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:41:27,738 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:41:27,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:41:27,738 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:41:27,738 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:41:27,738 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:41:27,740 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:41:27,740 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:41:27,740 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:41:27,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:41:27,741 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:41:27,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:41:27,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:41:27,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:41:27,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:41:27,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:41:27,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:41:27,743 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:41:27,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:41:27,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:41:27,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:41:27,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:41:27,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:41:27,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:41:27,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:41:27,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:41:27,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:41:27,745 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:41:27,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:41:27,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:41:27,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:41:27,746 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:41:28,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:41:28,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:41:28,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:41:28,095 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:41:28,096 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:41:28,096 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-11-24 05:41:28,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9feb87872/f07edd42ff6b46808c1d0c0be24a7e17/FLAG7f8011205 [2019-11-24 05:41:28,600 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:41:28,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-11-24 05:41:28,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9feb87872/f07edd42ff6b46808c1d0c0be24a7e17/FLAG7f8011205 [2019-11-24 05:41:29,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9feb87872/f07edd42ff6b46808c1d0c0be24a7e17 [2019-11-24 05:41:29,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:41:29,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:41:29,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:29,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:41:29,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:41:29,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fae2f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29, skipping insertion in model container [2019-11-24 05:41:29,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:41:29,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:41:29,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:29,266 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:41:29,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:29,309 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:41:29,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29 WrapperNode [2019-11-24 05:41:29,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:29,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:29,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:41:29,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:41:29,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:29,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:41:29,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:41:29,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:41:29,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (1/1) ... [2019-11-24 05:41:29,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:41:29,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:41:29,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:41:29,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:41:29,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (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 05:41:29,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:41:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:41:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:41:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:41:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:41:29,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:41:30,177 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:41:30,178 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:41:30,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:30 BoogieIcfgContainer [2019-11-24 05:41:30,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:41:30,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:41:30,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:41:30,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:41:30,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:41:29" (1/3) ... [2019-11-24 05:41:30,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:30, skipping insertion in model container [2019-11-24 05:41:30,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:29" (2/3) ... [2019-11-24 05:41:30,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:30, skipping insertion in model container [2019-11-24 05:41:30,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:30" (3/3) ... [2019-11-24 05:41:30,188 INFO L109 eAbstractionObserver]: Analyzing ICFG max40-1.i [2019-11-24 05:41:30,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:41:30,207 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:41:30,219 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:41:30,244 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:41:30,244 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:41:30,244 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:41:30,245 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:41:30,245 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:41:30,245 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:41:30,245 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:41:30,246 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:41:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:41:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:41:30,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:30,268 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:30,268 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1794448249, now seen corresponding path program 1 times [2019-11-24 05:41:30,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:30,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414438042] [2019-11-24 05:41:30,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:30,417 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 05:41:30,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414438042] [2019-11-24 05:41:30,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:41:30,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:41:30,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823112858] [2019-11-24 05:41:30,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:41:30,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:30,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:41:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:41:30,440 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:41:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:30,468 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:41:30,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:41:30,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:41:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:30,480 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:41:30,480 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:41:30,484 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 05:41:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:41:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:41:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:41:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:41:30,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:41:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:30,519 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:41:30,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:41:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:41:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:41:30,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:30,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:30,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2024605637, now seen corresponding path program 1 times [2019-11-24 05:41:30,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:30,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830167256] [2019-11-24 05:41:30,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:30,583 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 05:41:30,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830167256] [2019-11-24 05:41:30,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36482212] [2019-11-24 05:41:30,585 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 05:41:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:30,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:30,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:30,697 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 05:41:30,698 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:30,711 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 05:41:30,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:30,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:30,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693467525] [2019-11-24 05:41:30,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:30,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:30,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:30,716 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:41:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:30,785 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:41:30,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:30,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:41:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:30,787 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:41:30,787 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:41:30,788 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 05:41:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:41:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:41:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:41:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:41:30,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:41:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:30,797 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:41:30,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:41:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:41:30,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:30,801 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:31,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:31,003 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1835444987, now seen corresponding path program 1 times [2019-11-24 05:41:31,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:31,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000870683] [2019-11-24 05:41:31,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:31,069 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 05:41:31,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000870683] [2019-11-24 05:41:31,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796306942] [2019-11-24 05:41:31,074 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 05:41:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:31,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:31,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:31,170 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 05:41:31,170 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:31,180 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 05:41:31,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:31,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:31,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211006647] [2019-11-24 05:41:31,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:31,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:31,182 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:41:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:31,198 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:41:31,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:31,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:41:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:31,199 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:41:31,199 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:41:31,200 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 05:41:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:41:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:41:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:41:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:41:31,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:41:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:31,205 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:41:31,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:41:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:41:31,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:31,206 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:31,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:31,410 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash 293651941, now seen corresponding path program 1 times [2019-11-24 05:41:31,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:31,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389494606] [2019-11-24 05:41:31,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:31,466 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 05:41:31,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389494606] [2019-11-24 05:41:31,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047224444] [2019-11-24 05:41:31,467 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 05:41:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:31,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:41:31,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:31,542 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 05:41:31,542 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:31,563 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 05:41:31,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261388663] [2019-11-24 05:41:31,618 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:41:31,618 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:41:31,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:41:31,634 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:41:31,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:41:56,499 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 231 [2019-11-24 05:41:56,630 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 224 [2019-11-24 05:41:56,783 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 329 [2019-11-24 05:41:57,026 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-24 05:41:57,334 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 509 [2019-11-24 05:41:58,008 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 506 [2019-11-24 05:41:58,678 WARN L192 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 875 DAG size of output: 859 [2019-11-24 05:41:59,974 WARN L192 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 846 [2019-11-24 05:42:01,736 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1439 DAG size of output: 1418 [2019-11-24 05:42:06,866 WARN L192 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1413 DAG size of output: 1409 [2019-11-24 05:42:15,302 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 1410 [2019-11-24 05:42:17,091 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1411 DAG size of output: 1411 [2019-11-24 05:42:22,053 WARN L192 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 2379 DAG size of output: 2353 [2019-11-24 05:42:29,131 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6406 conjuctions. This might take some time... [2019-11-24 05:42:35,823 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6340 conjuctions. This might take some time... [2019-11-24 05:42:47,704 WARN L192 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 2345 DAG size of output: 2326 [2019-11-24 05:42:52,234 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6159 conjuctions. This might take some time... [2019-11-24 05:42:56,324 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7565 conjuctions. This might take some time...