java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:31:23,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:31:23,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:31:23,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:31:23,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:31:23,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:31:23,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:31:23,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:31:23,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:31:23,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:31:23,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:31:23,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-07 03:31:23,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:31:23,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:31:23,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:31:23,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 03:31:23,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:31:23,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:31:23,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:31:23,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:31:23,470 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:31:23,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:31:23,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:31:23,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:31:23,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:31:23,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:31:23,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:31:23,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:31:23,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:31:23,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:31:23,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:31:23,474 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:31:23,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:31:23,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:31:23,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:31:23,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:31:23,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:31:23,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:31:23,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:31:23,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:31:23,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:31:23,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:31:23,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:31:23,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:31:23,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 03:31:23,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:31:23,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:31:23,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:31:23,799 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:31:23,801 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:31:23,801 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-07 03:31:23,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c429e58/a9cd4af7aa58491fbf777e0343a93bbc/FLAGed8676e5c [2019-10-07 03:31:24,575 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:31:24,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label11.c [2019-10-07 03:31:24,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c429e58/a9cd4af7aa58491fbf777e0343a93bbc/FLAGed8676e5c [2019-10-07 03:31:24,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31c429e58/a9cd4af7aa58491fbf777e0343a93bbc [2019-10-07 03:31:24,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:31:24,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:31:24,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:24,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:31:24,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:31:24,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:24" (1/1) ... [2019-10-07 03:31:24,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a7751a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:24, skipping insertion in model container [2019-10-07 03:31:24,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:24" (1/1) ... [2019-10-07 03:31:24,773 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:31:24,847 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:31:25,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:25,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:31:26,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:26,026 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:31:26,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26 WrapperNode [2019-10-07 03:31:26,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:26,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:31:26,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:31:26,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:31:26,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (1/1) ... [2019-10-07 03:31:26,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:31:26,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:31:26,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:31:26,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:31:26,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (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 [2019-10-07 03:31:26,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:31:26,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:31:26,318 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:31:26,318 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:31:26,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:31:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:31:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:31:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:31:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:31:26,320 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:31:26,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:31:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:31:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:31:39,216 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:31:39,216 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:31:39,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:39 BoogieIcfgContainer [2019-10-07 03:31:39,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:31:39,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:31:39,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:31:39,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:31:39,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:31:24" (1/3) ... [2019-10-07 03:31:39,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ba59b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:39, skipping insertion in model container [2019-10-07 03:31:39,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:26" (2/3) ... [2019-10-07 03:31:39,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ba59b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:39, skipping insertion in model container [2019-10-07 03:31:39,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:39" (3/3) ... [2019-10-07 03:31:39,230 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label11.c [2019-10-07 03:31:39,241 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:31:39,251 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:31:39,263 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:31:39,302 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:31:39,303 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:31:39,303 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:31:39,303 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:31:39,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:31:39,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:31:39,304 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:31:39,304 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:31:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:31:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:31:39,341 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:39,342 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:39,344 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash 863566911, now seen corresponding path program 1 times [2019-10-07 03:31:39,356 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:39,356 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:39,356 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:39,356 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:39,631 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:39,631 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:39,631 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:31:39,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:31:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:31:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:31:39,657 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-07 03:31:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:41,447 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-07 03:31:41,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:31:41,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:31:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:41,469 INFO L225 Difference]: With dead ends: 718 [2019-10-07 03:31:41,470 INFO L226 Difference]: Without dead ends: 471 [2019-10-07 03:31:41,478 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:31:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-07 03:31:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2019-10-07 03:31:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-10-07 03:31:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2019-10-07 03:31:41,574 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2019-10-07 03:31:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:41,575 INFO L462 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2019-10-07 03:31:41,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:31:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2019-10-07 03:31:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 03:31:41,580 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:41,580 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:41,580 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1736333197, now seen corresponding path program 1 times [2019-10-07 03:31:41,583 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:41,583 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:41,583 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:41,584 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:41,831 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:41,831 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:41,832 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 03:31:41,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:31:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:31:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 03:31:41,834 INFO L87 Difference]: Start difference. First operand 455 states and 857 transitions. Second operand 5 states. [2019-10-07 03:31:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:44,181 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2019-10-07 03:31:44,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:31:44,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-07 03:31:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:44,192 INFO L225 Difference]: With dead ends: 1369 [2019-10-07 03:31:44,192 INFO L226 Difference]: Without dead ends: 919 [2019-10-07 03:31:44,194 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 03:31:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-10-07 03:31:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2019-10-07 03:31:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2019-10-07 03:31:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2019-10-07 03:31:44,251 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2019-10-07 03:31:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:44,251 INFO L462 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2019-10-07 03:31:44,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:31:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2019-10-07 03:31:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-07 03:31:44,253 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:44,253 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:44,254 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash 445327754, now seen corresponding path program 1 times [2019-10-07 03:31:44,255 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:44,255 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:44,255 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:44,255 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:31:44,367 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:44,367 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:44,367 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:31:44,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:31:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:31:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:31:44,369 INFO L87 Difference]: Start difference. First operand 879 states and 1570 transitions. Second operand 6 states. [2019-10-07 03:31:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:46,630 INFO L93 Difference]: Finished difference Result 2455 states and 4487 transitions. [2019-10-07 03:31:46,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:31:46,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2019-10-07 03:31:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:46,649 INFO L225 Difference]: With dead ends: 2455 [2019-10-07 03:31:46,650 INFO L226 Difference]: Without dead ends: 1581 [2019-10-07 03:31:46,653 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:31:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2019-10-07 03:31:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1560. [2019-10-07 03:31:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1560 states. [2019-10-07 03:31:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2706 transitions. [2019-10-07 03:31:46,744 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2706 transitions. Word has length 50 [2019-10-07 03:31:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:46,747 INFO L462 AbstractCegarLoop]: Abstraction has 1560 states and 2706 transitions. [2019-10-07 03:31:46,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:31:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2706 transitions. [2019-10-07 03:31:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-07 03:31:46,750 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:46,750 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:46,750 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash 554686731, now seen corresponding path program 1 times [2019-10-07 03:31:46,751 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:46,751 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:46,751 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:46,752 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:46,898 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:46,898 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:46,898 INFO L95 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 [2019-10-07 03:31:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:47,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:31:47,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:31:47,122 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:47,209 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:31:47,209 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:31:47,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:31:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:31:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:31:47,211 INFO L87 Difference]: Start difference. First operand 1560 states and 2706 transitions. Second operand 5 states. [2019-10-07 03:31:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:50,035 INFO L93 Difference]: Finished difference Result 3811 states and 6632 transitions. [2019-10-07 03:31:50,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 03:31:50,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-07 03:31:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:50,050 INFO L225 Difference]: With dead ends: 3811 [2019-10-07 03:31:50,050 INFO L226 Difference]: Without dead ends: 2256 [2019-10-07 03:31:50,057 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-07 03:31:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2019-10-07 03:31:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2222. [2019-10-07 03:31:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2222 states. [2019-10-07 03:31:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3220 transitions. [2019-10-07 03:31:50,137 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3220 transitions. Word has length 63 [2019-10-07 03:31:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:50,137 INFO L462 AbstractCegarLoop]: Abstraction has 2222 states and 3220 transitions. [2019-10-07 03:31:50,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:31:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3220 transitions. [2019-10-07 03:31:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-07 03:31:50,141 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:50,142 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:50,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:50,346 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:50,347 INFO L82 PathProgramCache]: Analyzing trace with hash 705364815, now seen corresponding path program 1 times [2019-10-07 03:31:50,347 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:50,347 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:50,348 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:50,348 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:50,454 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:50,454 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:50,454 INFO L95 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 [2019-10-07 03:31:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:50,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:31:50,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:31:50,579 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:31:50,651 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:31:50,652 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:31:50,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:31:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:31:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:31:50,653 INFO L87 Difference]: Start difference. First operand 2222 states and 3220 transitions. Second operand 5 states. [2019-10-07 03:31:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:52,843 INFO L93 Difference]: Finished difference Result 5177 states and 7563 transitions. [2019-10-07 03:31:52,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:31:52,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-10-07 03:31:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:52,858 INFO L225 Difference]: With dead ends: 5177 [2019-10-07 03:31:52,858 INFO L226 Difference]: Without dead ends: 2960 [2019-10-07 03:31:52,864 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-07 03:31:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-10-07 03:31:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2907. [2019-10-07 03:31:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2907 states. [2019-10-07 03:31:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4097 transitions. [2019-10-07 03:31:52,941 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4097 transitions. Word has length 85 [2019-10-07 03:31:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:52,943 INFO L462 AbstractCegarLoop]: Abstraction has 2907 states and 4097 transitions. [2019-10-07 03:31:52,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:31:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4097 transitions. [2019-10-07 03:31:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-07 03:31:52,948 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:52,949 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:53,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:53,158 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 265485065, now seen corresponding path program 1 times [2019-10-07 03:31:53,159 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:53,159 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:53,159 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:53,159 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 03:31:53,324 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:53,325 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:31:53,326 INFO L95 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 [2019-10-07 03:31:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:53,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:31:53,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:31:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:31:53,545 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:31:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 03:31:53,622 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:31:53,663 INFO L162 IcfgInterpreter]: Started Sifa with 64 locations of interest [2019-10-07 03:31:53,663 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:31:53,671 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:31:53,686 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:31:53,687 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:31:53,893 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-10-07 03:31:54,019 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-07 03:31:54,145 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2019-10-07 03:31:54,430 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2019-10-07 03:31:54,605 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-07 03:31:54,613 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-07 03:31:54,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:31:54,878 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:31:54,885 INFO L168 Benchmark]: Toolchain (without parser) took 30128.68 ms. Allocated memory was 138.4 MB in the beginning and 558.4 MB in the end (delta: 420.0 MB). Free memory was 98.5 MB in the beginning and 252.0 MB in the end (delta: -153.5 MB). Peak memory consumption was 266.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,886 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1271.86 ms. Allocated memory was 138.4 MB in the beginning and 206.0 MB in the end (delta: 67.6 MB). Free memory was 98.3 MB in the beginning and 131.5 MB in the end (delta: -33.2 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,888 INFO L168 Benchmark]: Boogie Preprocessor took 206.97 ms. Allocated memory is still 206.0 MB. Free memory was 131.5 MB in the beginning and 120.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,889 INFO L168 Benchmark]: RCFGBuilder took 12982.26 ms. Allocated memory was 206.0 MB in the beginning and 305.7 MB in the end (delta: 99.6 MB). Free memory was 120.6 MB in the beginning and 104.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 144.2 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,890 INFO L168 Benchmark]: TraceAbstraction took 15662.56 ms. Allocated memory was 305.7 MB in the beginning and 558.4 MB in the end (delta: 252.7 MB). Free memory was 104.3 MB in the beginning and 252.0 MB in the end (delta: -147.7 MB). Peak memory consumption was 105.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:31:54,900 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1271.86 ms. Allocated memory was 138.4 MB in the beginning and 206.0 MB in the end (delta: 67.6 MB). Free memory was 98.3 MB in the beginning and 131.5 MB in the end (delta: -33.2 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 206.97 ms. Allocated memory is still 206.0 MB. Free memory was 131.5 MB in the beginning and 120.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12982.26 ms. Allocated memory was 206.0 MB in the beginning and 305.7 MB in the end (delta: 99.6 MB). Free memory was 120.6 MB in the beginning and 104.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 144.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15662.56 ms. Allocated memory was 305.7 MB in the beginning and 558.4 MB in the end (delta: 252.7 MB). Free memory was 104.3 MB in the beginning and 252.0 MB in the end (delta: -147.7 MB). Peak memory consumption was 105.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...