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/Problem02_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:19,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:19,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:19,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:19,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:41:19,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:41:19,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:41:19,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:41:19,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:41:19,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:41:19,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:41:19,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:41:19,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:41:19,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:41:19,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:41:19,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:41:19,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:41:19,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:19,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:19,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:19,431 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 01:41:19,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:19,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:19,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:19,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:19,447 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:19,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:19,447 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:19,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:19,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:19,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:19,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:19,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:19,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:19,449 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:19,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:19,449 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:19,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:19,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:19,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:19,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:19,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:19,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:19,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:19,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:19,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:19,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:19,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:19,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:19,452 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 01:41:19,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:19,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:19,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:19,762 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:19,762 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:19,763 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2019-10-15 01:41:19,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328ce4768/18c8ea33bd7a4fbdaec322b716bfa576/FLAG2af7cbc27 [2019-10-15 01:41:20,365 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:20,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2019-10-15 01:41:20,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328ce4768/18c8ea33bd7a4fbdaec322b716bfa576/FLAG2af7cbc27 [2019-10-15 01:41:20,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328ce4768/18c8ea33bd7a4fbdaec322b716bfa576 [2019-10-15 01:41:20,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:20,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:20,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:20,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:20,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:20,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:20" (1/1) ... [2019-10-15 01:41:20,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c0bab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:20, skipping insertion in model container [2019-10-15 01:41:20,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:20" (1/1) ... [2019-10-15 01:41:20,721 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:20,779 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:21,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:21,407 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:21,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:21,536 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:21,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21 WrapperNode [2019-10-15 01:41:21,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:21,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:21,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:21,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:21,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (1/1) ... [2019-10-15 01:41:21,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:21,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:21,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:21,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:21,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (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 01:41:21,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:21,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:21,700 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:21,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:21,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:21,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:21,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:23,819 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:23,820 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:23,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:23 BoogieIcfgContainer [2019-10-15 01:41:23,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:23,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:23,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:23,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:23,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:20" (1/3) ... [2019-10-15 01:41:23,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d16bdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:23, skipping insertion in model container [2019-10-15 01:41:23,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:21" (2/3) ... [2019-10-15 01:41:23,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d16bdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:23, skipping insertion in model container [2019-10-15 01:41:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:23" (3/3) ... [2019-10-15 01:41:23,838 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label08.c [2019-10-15 01:41:23,851 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:23,861 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:23,873 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:23,908 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:23,908 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:23,908 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:23,909 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:23,909 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:23,909 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:23,909 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:23,909 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:23,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:23,954 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:41:23,956 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash -219359945, now seen corresponding path program 1 times [2019-10-15 01:41:23,972 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:23,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274219778] [2019-10-15 01:41:23,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:23,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:23,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:24,425 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 01:41:24,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274219778] [2019-10-15 01:41:24,427 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:24,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:24,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884695934] [2019-10-15 01:41:24,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:24,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:24,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:24,452 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:25,039 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:25,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:25,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:25,063 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:25,063 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:25,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:25,173 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:25,175 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:25,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:25,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:25,192 INFO L380 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, 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] [2019-10-15 01:41:25,192 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash -701894724, now seen corresponding path program 1 times [2019-10-15 01:41:25,195 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:25,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081242420] [2019-10-15 01:41:25,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:25,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:25,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:41:25,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081242420] [2019-10-15 01:41:25,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286107984] [2019-10-15 01:41:25,382 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 01:41:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:25,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:25,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:25,577 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:25,634 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:25,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:41:25,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75493150] [2019-10-15 01:41:25,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:25,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:25,637 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:41:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:26,053 INFO L93 Difference]: Finished difference Result 345 states and 626 transitions. [2019-10-15 01:41:26,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:26,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:26,058 INFO L225 Difference]: With dead ends: 345 [2019-10-15 01:41:26,059 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:41:26,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:41:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:41:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:41:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 475 transitions. [2019-10-15 01:41:26,079 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 475 transitions. Word has length 94 [2019-10-15 01:41:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:26,080 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 475 transitions. [2019-10-15 01:41:26,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 475 transitions. [2019-10-15 01:41:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:41:26,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:26,082 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:41:26,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:26,286 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1307298401, now seen corresponding path program 1 times [2019-10-15 01:41:26,287 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:26,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965051748] [2019-10-15 01:41:26,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:26,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:26,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:26,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965051748] [2019-10-15 01:41:26,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:26,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:26,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161100370] [2019-10-15 01:41:26,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:26,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:26,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:26,461 INFO L87 Difference]: Start difference. First operand 259 states and 475 transitions. Second operand 6 states. [2019-10-15 01:41:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:27,094 INFO L93 Difference]: Finished difference Result 797 states and 1529 transitions. [2019-10-15 01:41:27,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:27,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:41:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:27,102 INFO L225 Difference]: With dead ends: 797 [2019-10-15 01:41:27,103 INFO L226 Difference]: Without dead ends: 543 [2019-10-15 01:41:27,107 INFO L600 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 [2019-10-15 01:41:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2019-10-15 01:41:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 527. [2019-10-15 01:41:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2019-10-15 01:41:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 944 transitions. [2019-10-15 01:41:27,159 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 944 transitions. Word has length 108 [2019-10-15 01:41:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:27,159 INFO L462 AbstractCegarLoop]: Abstraction has 527 states and 944 transitions. [2019-10-15 01:41:27,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 944 transitions. [2019-10-15 01:41:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 01:41:27,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:27,163 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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] [2019-10-15 01:41:27,163 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -852387033, now seen corresponding path program 1 times [2019-10-15 01:41:27,164 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:27,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471776913] [2019-10-15 01:41:27,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:27,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471776913] [2019-10-15 01:41:27,272 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:27,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:27,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648376159] [2019-10-15 01:41:27,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:27,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:27,274 INFO L87 Difference]: Start difference. First operand 527 states and 944 transitions. Second operand 3 states. [2019-10-15 01:41:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:27,681 INFO L93 Difference]: Finished difference Result 1049 states and 1898 transitions. [2019-10-15 01:41:27,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:27,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-15 01:41:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:27,685 INFO L225 Difference]: With dead ends: 1049 [2019-10-15 01:41:27,686 INFO L226 Difference]: Without dead ends: 527 [2019-10-15 01:41:27,688 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-15 01:41:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 441. [2019-10-15 01:41:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-15 01:41:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 721 transitions. [2019-10-15 01:41:27,709 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 721 transitions. Word has length 112 [2019-10-15 01:41:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:27,710 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 721 transitions. [2019-10-15 01:41:27,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 721 transitions. [2019-10-15 01:41:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:41:27,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:27,713 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2019-10-15 01:41:27,713 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1860595300, now seen corresponding path program 1 times [2019-10-15 01:41:27,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:27,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951449357] [2019-10-15 01:41:27,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:27,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:27,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951449357] [2019-10-15 01:41:27,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101593955] [2019-10-15 01:41:27,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:27,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:27,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:27,927 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:28,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707824293] [2019-10-15 01:41:28,052 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:28,052 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:28,059 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:28,067 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:28,068 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:28,311 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:41:30,471 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:41:38,826 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:41:38,918 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 12064 conjuctions. This might take some time... [2019-10-15 01:41:39,494 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-15 01:41:39,735 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21104 conjuctions. This might take some time... [2019-10-15 01:41:40,483 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-15 01:41:40,701 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 21104 conjuctions. This might take some time... [2019-10-15 01:41:41,511 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:41:41,523 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:41:41,779 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-10-15 01:41:42,027 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:41:42,331 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:41:42,645 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-10-15 01:41:42,962 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 85 [2019-10-15 01:41:43,238 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:41:43,471 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:41:43,726 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:41:44,033 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2019-10-15 01:41:44,892 WARN L191 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 88 [2019-10-15 01:41:45,134 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:41:48,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:41:48,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 23 [2019-10-15 01:41:48,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327986231] [2019-10-15 01:41:48,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:41:48,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:48,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:41:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:41:48,165 INFO L87 Difference]: Start difference. First operand 441 states and 721 transitions. Second operand 23 states. [2019-10-15 01:41:48,467 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:41:48,837 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:41:49,228 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:41:49,638 WARN L191 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2019-10-15 01:41:49,992 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:41:50,358 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:41:52,085 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:41:52,440 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-10-15 01:41:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:57,278 INFO L93 Difference]: Finished difference Result 2052 states and 3547 transitions. [2019-10-15 01:41:57,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:41:57,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-10-15 01:41:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:57,299 INFO L225 Difference]: With dead ends: 2052 [2019-10-15 01:41:57,302 INFO L226 Difference]: Without dead ends: 1616 [2019-10-15 01:41:57,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 252 SyntacticMatches, 86 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 01:41:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2019-10-15 01:41:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1524. [2019-10-15 01:41:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2019-10-15 01:41:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2276 transitions. [2019-10-15 01:41:57,386 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2276 transitions. Word has length 116 [2019-10-15 01:41:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:57,387 INFO L462 AbstractCegarLoop]: Abstraction has 1524 states and 2276 transitions. [2019-10-15 01:41:57,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:41:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2276 transitions. [2019-10-15 01:41:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-15 01:41:57,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:57,397 INFO L380 BasicCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:41:57,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:57,603 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:57,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2133632761, now seen corresponding path program 1 times [2019-10-15 01:41:57,604 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:57,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744145107] [2019-10-15 01:41:57,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:41:57,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744145107] [2019-10-15 01:41:57,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106862970] [2019-10-15 01:41:57,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:57,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:57,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:57,947 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:41:58,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479633099] [2019-10-15 01:41:58,085 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:58,085 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:58,086 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:58,086 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:58,087 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:58,204 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:41:59,176 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs