/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:40:49,031 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:40:49,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:40:49,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:40:49,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:40:49,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:40:49,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:40:49,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:40:49,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:40:49,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:40:49,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:40:49,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:40:49,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:40:49,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:40:49,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:40:49,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:40:49,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:40:49,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:40:49,110 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 [2019-11-07 01:40:49,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:40:49,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:40:49,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:40:49,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:40:49,146 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:40:49,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:40:49,147 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:40:49,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:40:49,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:40:49,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:40:49,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:40:49,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:40:49,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:40:49,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:40:49,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:40:49,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:40:49,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:40:49,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:40:49,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:40:49,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:40:49,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:40:49,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:40:49,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:40:49,151 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 [2019-11-07 01:40:49,413 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:40:49,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:40:49,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:40:49,430 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:40:49,431 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:40:49,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-11-07 01:40:49,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec2b6304/ff3fd3fbc9d544728a45ed103495b0d0/FLAGca135d22b [2019-11-07 01:40:50,042 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:40:50,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-11-07 01:40:50,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec2b6304/ff3fd3fbc9d544728a45ed103495b0d0/FLAGca135d22b [2019-11-07 01:40:50,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec2b6304/ff3fd3fbc9d544728a45ed103495b0d0 [2019-11-07 01:40:50,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:40:50,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:40:50,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:50,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:40:50,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:40:50,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:50" (1/1) ... [2019-11-07 01:40:50,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0b7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:50, skipping insertion in model container [2019-11-07 01:40:50,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:50" (1/1) ... [2019-11-07 01:40:50,326 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:40:50,379 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:40:50,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:50,787 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:40:51,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:51,034 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:40:51,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51 WrapperNode [2019-11-07 01:40:51,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:51,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:40:51,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:40:51,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:40:51,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... [2019-11-07 01:40:51,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:40:51,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:40:51,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:40:51,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:40:51,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:40:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:40:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:40:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:40:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:40:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:40:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:40:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:40:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:40:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:40:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:40:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:40:53,077 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:40:53,077 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:40:53,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:53 BoogieIcfgContainer [2019-11-07 01:40:53,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:40:53,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:40:53,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:40:53,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:40:53,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:50" (1/3) ... [2019-11-07 01:40:53,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfa0462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:53, skipping insertion in model container [2019-11-07 01:40:53,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:51" (2/3) ... [2019-11-07 01:40:53,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfa0462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:53, skipping insertion in model container [2019-11-07 01:40:53,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:53" (3/3) ... [2019-11-07 01:40:53,087 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-11-07 01:40:53,096 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:40:53,105 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:40:53,117 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:40:53,142 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:40:53,142 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:40:53,143 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:40:53,143 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:40:53,143 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:40:53,143 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:40:53,143 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:40:53,144 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:40:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:40:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:40:53,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:53,176 INFO L410 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] [2019-11-07 01:40:53,178 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -219365321, now seen corresponding path program 1 times [2019-11-07 01:40:53,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:53,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973447059] [2019-11-07 01:40:53,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:53,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973447059] [2019-11-07 01:40:53,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:53,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:53,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515417016] [2019-11-07 01:40:53,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:53,617 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:53,634 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:40:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:54,179 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:40:54,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:54,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:40:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:54,204 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:40:54,205 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:40:54,212 INFO L630 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 [2019-11-07 01:40:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:40:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:40:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:40:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:40:54,322 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:40:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:54,324 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:40:54,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:40:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:40:54,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:54,338 INFO L410 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] [2019-11-07 01:40:54,339 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash -701900100, now seen corresponding path program 1 times [2019-11-07 01:40:54,340 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:54,340 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776428521] [2019-11-07 01:40:54,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:54,570 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776428521] [2019-11-07 01:40:54,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:54,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:54,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202323179] [2019-11-07 01:40:54,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:54,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:54,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:54,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:54,574 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:40:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:54,954 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:40:54,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:54,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:40:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:54,959 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:40:54,959 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:40:54,962 INFO L630 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 [2019-11-07 01:40:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:40:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-11-07 01:40:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:40:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-11-07 01:40:54,986 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-11-07 01:40:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:54,987 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-11-07 01:40:54,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-11-07 01:40:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:40:54,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:54,990 INFO L410 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] [2019-11-07 01:40:54,990 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1307303777, now seen corresponding path program 1 times [2019-11-07 01:40:54,991 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:54,991 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293075174] [2019-11-07 01:40:54,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:55,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293075174] [2019-11-07 01:40:55,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:55,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:55,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476077449] [2019-11-07 01:40:55,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:55,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:55,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:55,088 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-11-07 01:40:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:55,745 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-11-07 01:40:55,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:40:55,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:40:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:55,755 INFO L225 Difference]: With dead ends: 1059 [2019-11-07 01:40:55,755 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 01:40:55,757 INFO L630 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 [2019-11-07 01:40:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 01:40:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-11-07 01:40:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-11-07 01:40:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1170 transitions. [2019-11-07 01:40:55,836 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1170 transitions. Word has length 108 [2019-11-07 01:40:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:55,838 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1170 transitions. [2019-11-07 01:40:55,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1170 transitions. [2019-11-07 01:40:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-07 01:40:55,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:55,844 INFO L410 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, 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] [2019-11-07 01:40:55,844 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2071202027, now seen corresponding path program 1 times [2019-11-07 01:40:55,845 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:55,845 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906658988] [2019-11-07 01:40:55,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:55,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906658988] [2019-11-07 01:40:55,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:55,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:55,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931966108] [2019-11-07 01:40:55,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:55,957 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:55,958 INFO L87 Difference]: Start difference. First operand 703 states and 1170 transitions. Second operand 6 states. [2019-11-07 01:40:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:56,663 INFO L93 Difference]: Finished difference Result 1783 states and 3030 transitions. [2019-11-07 01:40:56,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:40:56,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-11-07 01:40:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:56,672 INFO L225 Difference]: With dead ends: 1783 [2019-11-07 01:40:56,672 INFO L226 Difference]: Without dead ends: 1085 [2019-11-07 01:40:56,675 INFO L630 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 [2019-11-07 01:40:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2019-11-07 01:40:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1069. [2019-11-07 01:40:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-11-07 01:40:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1682 transitions. [2019-11-07 01:40:56,750 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1682 transitions. Word has length 114 [2019-11-07 01:40:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:56,750 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1682 transitions. [2019-11-07 01:40:56,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1682 transitions. [2019-11-07 01:40:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:40:56,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:56,757 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:56,757 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:56,758 INFO L82 PathProgramCache]: Analyzing trace with hash 5340402, now seen corresponding path program 1 times [2019-11-07 01:40:56,758 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:56,759 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028779446] [2019-11-07 01:40:56,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:57,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028779446] [2019-11-07 01:40:57,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861243899] [2019-11-07 01:40:57,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:57,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:57,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:57,224 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:57,308 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:40:57,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 10 [2019-11-07 01:40:57,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124295497] [2019-11-07 01:40:57,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:57,311 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:40:57,312 INFO L87 Difference]: Start difference. First operand 1069 states and 1682 transitions. Second operand 3 states. [2019-11-07 01:40:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:57,761 INFO L93 Difference]: Finished difference Result 2733 states and 4373 transitions. [2019-11-07 01:40:57,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:57,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:40:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:57,779 INFO L225 Difference]: With dead ends: 2733 [2019-11-07 01:40:57,779 INFO L226 Difference]: Without dead ends: 977 [2019-11-07 01:40:57,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:40:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-11-07 01:40:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 975. [2019-11-07 01:40:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-11-07 01:40:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1450 transitions. [2019-11-07 01:40:57,830 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1450 transitions. Word has length 121 [2019-11-07 01:40:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:57,831 INFO L462 AbstractCegarLoop]: Abstraction has 975 states and 1450 transitions. [2019-11-07 01:40:57,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1450 transitions. [2019-11-07 01:40:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 01:40:57,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:57,838 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:58,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:58,045 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash -89310220, now seen corresponding path program 1 times [2019-11-07 01:40:58,045 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:58,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090419250] [2019-11-07 01:40:58,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:58,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090419250] [2019-11-07 01:40:58,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398933021] [2019-11-07 01:40:58,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:58,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:58,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:58,323 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:58,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582758822] [2019-11-07 01:40:58,453 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:40:58,454 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:40:58,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:40:58,475 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:40:58,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:40:58,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:40:59,892 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:41:06,949 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-11-07 01:41:07,071 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10352 conjuctions. This might take some time... [2019-11-07 01:41:07,572 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-11-07 01:41:07,653 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10352 conjuctions. This might take some time... [2019-11-07 01:41:08,286 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-11-07 01:41:08,384 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10352 conjuctions. This might take some time... [2019-11-07 01:41:13,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:41:13,673 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:41:14,142 WARN L191 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-11-07 01:41:14,499 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:41:15,360 WARN L191 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2019-11-07 01:41:16,091 WARN L191 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 101 [2019-11-07 01:41:16,368 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:41:16,591 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:41:16,829 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:41:17,127 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2019-11-07 01:41:17,478 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2019-11-07 01:41:17,796 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:41:18,165 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-11-07 01:41:25,800 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:41:25,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 13] total 26 [2019-11-07 01:41:25,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784051710] [2019-11-07 01:41:25,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:41:25,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:41:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:41:25,803 INFO L87 Difference]: Start difference. First operand 975 states and 1450 transitions. Second operand 26 states. [2019-11-07 01:41:25,974 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:41:26,468 WARN L191 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2019-11-07 01:41:27,093 WARN L191 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 98 [2019-11-07 01:41:27,837 WARN L191 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2019-11-07 01:41:28,151 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-11-07 01:41:28,497 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 92 [2019-11-07 01:41:28,651 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2019-11-07 01:41:30,115 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2019-11-07 01:41:30,365 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73