/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/max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:40:51,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:40:51,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:40:51,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:40:51,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:40:51,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:40:51,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:40:51,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:40:51,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:40:51,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:40:51,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:40:51,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-24 05:40:51,608 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 05:40:51,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:40:51,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:40:51,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:40:51,629 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:40:51,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:40:51,629 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:40:51,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:40:51,630 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:40:51,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:40:51,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:40:51,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:40:51,631 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:40:51,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:40:51,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:40:51,632 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:40:51,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:40:51,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:40:51,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:40:51,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:40:51,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:40:51,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:40:51,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:40:51,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:40:51,635 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:40:51,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:40:51,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:40:51,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:40:51,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:40:51,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:40:51,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:40:51,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:40:51,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:40:51,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:40:51,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:40:51,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:40:51,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:40:51,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:40:51,639 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:40:51,941 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:40:51,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:40:51,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:40:51,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:40:51,970 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:40:51,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2019-11-24 05:40:52,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f297eac/ac9172da6ddd45569a4480923537f3cc/FLAG190683909 [2019-11-24 05:40:52,526 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:40:52,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2019-11-24 05:40:52,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f297eac/ac9172da6ddd45569a4480923537f3cc/FLAG190683909 [2019-11-24 05:40:52,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32f297eac/ac9172da6ddd45569a4480923537f3cc [2019-11-24 05:40:52,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:40:52,880 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:40:52,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:52,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:40:52,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:40:52,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:52" (1/1) ... [2019-11-24 05:40:52,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7bbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:52, skipping insertion in model container [2019-11-24 05:40:52,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:52" (1/1) ... [2019-11-24 05:40:52,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:40:52,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:40:53,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:53,160 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:40:53,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:53,198 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:40:53,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53 WrapperNode [2019-11-24 05:40:53,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:53,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:53,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:40:53,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:40:53,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:53,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:40:53,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:40:53,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:40:53,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (1/1) ... [2019-11-24 05:40:53,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:40:53,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:40:53,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:40:53,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:40:53,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (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 05:40:53,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:40:53,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:40:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:40:53,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:40:53,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:40:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:40:54,035 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:40:54,036 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-24 05:40:54,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:54 BoogieIcfgContainer [2019-11-24 05:40:54,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:40:54,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:40:54,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:40:54,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:40:54,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:40:52" (1/3) ... [2019-11-24 05:40:54,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b5af5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:54, skipping insertion in model container [2019-11-24 05:40:54,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:53" (2/3) ... [2019-11-24 05:40:54,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b5af5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:54, skipping insertion in model container [2019-11-24 05:40:54,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:54" (3/3) ... [2019-11-24 05:40:54,051 INFO L109 eAbstractionObserver]: Analyzing ICFG max.i [2019-11-24 05:40:54,060 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:40:54,066 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:40:54,078 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:40:54,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:40:54,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:40:54,100 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:40:54,100 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:40:54,100 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:40:54,100 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:40:54,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:40:54,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:40:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 05:40:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:40:54,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:54,121 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:54,121 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash 316726886, now seen corresponding path program 1 times [2019-11-24 05:40:54,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:54,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635997447] [2019-11-24 05:40:54,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:54,330 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 05:40:54,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635997447] [2019-11-24 05:40:54,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:40:54,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:40:54,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618681995] [2019-11-24 05:40:54,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:40:54,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:40:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:40:54,353 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-24 05:40:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:54,418 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2019-11-24 05:40:54,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:40:54,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:40:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:54,434 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:40:54,434 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:40:54,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:40:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:40:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:40:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:40:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-24 05:40:54,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2019-11-24 05:40:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:54,490 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-24 05:40:54,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:40:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-24 05:40:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:40:54,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:54,492 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:54,492 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1919844100, now seen corresponding path program 1 times [2019-11-24 05:40:54,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:54,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390914637] [2019-11-24 05:40:54,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:54,600 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 05:40:54,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390914637] [2019-11-24 05:40:54,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:40:54,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:40:54,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904186502] [2019-11-24 05:40:54,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:40:54,604 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 4 states. [2019-11-24 05:40:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:54,651 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-24 05:40:54,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:54,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:40:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:54,652 INFO L225 Difference]: With dead ends: 17 [2019-11-24 05:40:54,653 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 05:40:54,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:40:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 05:40:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 05:40:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 05:40:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-24 05:40:54,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2019-11-24 05:40:54,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:54,658 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-24 05:40:54,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-24 05:40:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 05:40:54,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:54,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:54,660 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1613418518, now seen corresponding path program 1 times [2019-11-24 05:40:54,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:54,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209700144] [2019-11-24 05:40:54,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:40:54,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209700144] [2019-11-24 05:40:54,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:40:54,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:40:54,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303046069] [2019-11-24 05:40:54,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:54,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:40:54,748 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2019-11-24 05:40:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:54,808 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2019-11-24 05:40:54,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:54,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-24 05:40:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:54,810 INFO L225 Difference]: With dead ends: 18 [2019-11-24 05:40:54,810 INFO L226 Difference]: Without dead ends: 13 [2019-11-24 05:40:54,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:40:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-24 05:40:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-24 05:40:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 05:40:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-11-24 05:40:54,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2019-11-24 05:40:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:54,819 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-11-24 05:40:54,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-11-24 05:40:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:40:54,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:54,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:54,821 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1213038355, now seen corresponding path program 1 times [2019-11-24 05:40:54,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:54,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118003362] [2019-11-24 05:40:54,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:40:54,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118003362] [2019-11-24 05:40:54,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227881852] [2019-11-24 05:40:54,942 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 05:40:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:55,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:40:55,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:40:55,068 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:40:55,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824882379] [2019-11-24 05:40:55,115 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:40:55,116 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:40:55,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:40:55,129 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:40:55,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:40:55,904 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-24 05:40:56,252 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 253 [2019-11-24 05:40:56,664 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 238 [2019-11-24 05:40:57,309 WARN L192 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 389 [2019-11-24 05:40:57,951 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 379 [2019-11-24 05:40:59,079 WARN L192 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 659 DAG size of output: 650 [2019-11-24 05:41:00,471 WARN L192 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 635 [2019-11-24 05:41:01,867 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1003 DAG size of output: 994 [2019-11-24 05:41:04,136 WARN L192 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 994 DAG size of output: 994 [2019-11-24 05:41:07,864 WARN L192 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 1768 [2019-11-24 05:41:13,921 WARN L192 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 1769 DAG size of output: 1749 [2019-11-24 05:41:24,439 WARN L192 SmtUtils]: Spent 9.83 s on a formula simplification. DAG size of input: 3175 DAG size of output: 3173 [2019-11-24 05:41:34,829 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5248 conjuctions. This might take some time... [2019-11-24 05:41:51,118 WARN L192 SmtUtils]: Spent 10.47 s on a formula simplification. DAG size of input: 3172 DAG size of output: 3090 [2019-11-24 05:41:59,032 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5800 conjuctions. This might take some time... [2019-11-24 05:42:21,500 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5800 conjuctions. This might take some time...