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/Problem10_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:48:20,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:48:20,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:48:20,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:48:20,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:48:20,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:48:20,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:48:20,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:48:20,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:48:20,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:48:20,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:48:20,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:48:20,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:48:20,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:48:20,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:48:20,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:48:20,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:48:20,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:48:20,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:48:20,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:48:20,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:48:20,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:48:20,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:48:20,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:48:20,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:48:20,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:48:20,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:48:20,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:48:20,497 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 [2019-10-15 01:48:20,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:48:20,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:48:20,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:48:20,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:48:20,518 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:48:20,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:48:20,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:48:20,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:48:20,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:48:20,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:48:20,520 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:48:20,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:48:20,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:48:20,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:48:20,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:48:20,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:48:20,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:48:20,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:48:20,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:48:20,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:48:20,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:48:20,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:48:20,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:48:20,524 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 [2019-10-15 01:48:20,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:48:20,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:48:20,817 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:48:20,818 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:48:20,819 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:48:20,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-15 01:48:20,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6089c4f6a/54346a949acd4475b2fd91068fa03749/FLAG843e35900 [2019-10-15 01:48:21,449 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:48:21,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-15 01:48:21,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6089c4f6a/54346a949acd4475b2fd91068fa03749/FLAG843e35900 [2019-10-15 01:48:21,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6089c4f6a/54346a949acd4475b2fd91068fa03749 [2019-10-15 01:48:21,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:48:21,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:48:21,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:48:21,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:48:21,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:48:21,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:48:21" (1/1) ... [2019-10-15 01:48:21,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0fb666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:21, skipping insertion in model container [2019-10-15 01:48:21,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:48:21" (1/1) ... [2019-10-15 01:48:21,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:48:21,811 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:48:22,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:48:22,331 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:48:22,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:48:22,475 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:48:22,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22 WrapperNode [2019-10-15 01:48:22,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:48:22,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:48:22,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:48:22,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:48:22,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (1/1) ... [2019-10-15 01:48:22,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:48:22,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:48:22,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:48:22,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:48:22,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (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 [2019-10-15 01:48:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:48:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:48:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:48:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:48:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:48:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:48:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:48:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:48:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:48:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:48:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:48:55,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:48:55,509 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:48:55,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:48:55 BoogieIcfgContainer [2019-10-15 01:48:55,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:48:55,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:48:55,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:48:55,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:48:55,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:48:21" (1/3) ... [2019-10-15 01:48:55,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731b5737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:48:55, skipping insertion in model container [2019-10-15 01:48:55,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:48:22" (2/3) ... [2019-10-15 01:48:55,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731b5737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:48:55, skipping insertion in model container [2019-10-15 01:48:55,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:48:55" (3/3) ... [2019-10-15 01:48:55,522 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-10-15 01:48:55,531 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:48:55,539 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:48:55,547 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:48:55,569 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:48:55,569 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:48:55,569 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:48:55,569 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:48:55,570 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:48:55,570 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:48:55,571 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:48:55,571 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:48:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:48:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:48:55,593 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:48:55,593 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:48:55,595 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:48:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:48:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 277923134, now seen corresponding path program 1 times [2019-10-15 01:48:55,606 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:48:55,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38911010] [2019-10-15 01:48:55,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:48:55,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:48:55,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:48:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:48:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:48:55,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38911010] [2019-10-15 01:48:55,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:48:55,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:48:55,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908558277] [2019-10-15 01:48:55,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:48:55,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:48:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:48:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:48:55,871 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-10-15 01:48:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:48:57,974 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-15 01:48:57,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:48:57,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:48:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:48:57,986 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:48:57,986 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:48:57,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:48:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:48:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-15 01:48:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:48:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-15 01:48:58,029 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2019-10-15 01:48:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:48:58,030 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-15 01:48:58,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:48:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-15 01:48:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:48:58,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:48:58,032 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:48:58,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:48:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:48:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2053511069, now seen corresponding path program 1 times [2019-10-15 01:48:58,033 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:48:58,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211087712] [2019-10-15 01:48:58,034 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:48:58,034 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:48:58,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:48:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:48:58,820 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-10-15 01:48:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:48:59,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211087712] [2019-10-15 01:48:59,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449006714] [2019-10-15 01:48:59,042 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 [2019-10-15 01:48:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:48:59,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2019-10-15 01:48:59,144 INFO L279 TraceCheckSpWp]: Computing forward predicates...