java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:40,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:40,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:40,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:40,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:40,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:40,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:40,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:40,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:40,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:40,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:40,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:40,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:40,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:40,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:40,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:40,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:40,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:40,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:40,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:40,419 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 01:56:40,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:40,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:40,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:40,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:40,447 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:40,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:40,448 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:40,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:40,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:40,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:40,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:40,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:40,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:40,449 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:40,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:40,450 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:40,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:40,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:40,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:40,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:40,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:40,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:40,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:40,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:40,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:40,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:40,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:40,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:40,452 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 01:56:40,731 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:40,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:40,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:40,749 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:40,749 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:40,750 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-15 01:56:40,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f92498/d1caff470ebc495e87a7d6fae57617d0/FLAG30a0e404c [2019-10-15 01:56:41,454 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:41,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-15 01:56:41,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f92498/d1caff470ebc495e87a7d6fae57617d0/FLAG30a0e404c [2019-10-15 01:56:41,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f92498/d1caff470ebc495e87a7d6fae57617d0 [2019-10-15 01:56:41,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:41,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:41,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:41,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:41,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:41,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:41, skipping insertion in model container [2019-10-15 01:56:41,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:41" (1/1) ... [2019-10-15 01:56:41,679 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:41,758 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:42,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:42,475 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:42,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:42,877 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42 WrapperNode [2019-10-15 01:56:42,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:42,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:42,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:42,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:42,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:42,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:43,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:43,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:43,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (1/1) ... [2019-10-15 01:56:43,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:43,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:43,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:43,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:43,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (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 01:56:43,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:43,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:43,155 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:43,156 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:43,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:57,111 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:57,112 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:57,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:57 BoogieIcfgContainer [2019-10-15 01:56:57,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:57,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:57,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:57,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:57,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:41" (1/3) ... [2019-10-15 01:56:57,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60916e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:57, skipping insertion in model container [2019-10-15 01:56:57,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:42" (2/3) ... [2019-10-15 01:56:57,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60916e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:57, skipping insertion in model container [2019-10-15 01:56:57,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:57" (3/3) ... [2019-10-15 01:56:57,122 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-10-15 01:56:57,132 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:57,140 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:57,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:57,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:57,250 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:57,250 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:57,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:57,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:57,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:57,251 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:57,251 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:57,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:57,285 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:57,287 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 863563071, now seen corresponding path program 1 times [2019-10-15 01:56:57,302 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:57,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663272299] [2019-10-15 01:56:57,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:57,303 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:57,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:57,544 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 01:56:57,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663272299] [2019-10-15 01:56:57,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:57,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:56:57,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153561798] [2019-10-15 01:56:57,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:56:57,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:56:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:57,569 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:56:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:59,290 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:56:59,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:56:59,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:56:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:59,312 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:56:59,313 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:56:59,320 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 01:56:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:56:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-15 01:56:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-15 01:56:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-15 01:56:59,453 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-15 01:56:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:59,454 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-15 01:56:59,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:56:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-15 01:56:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:56:59,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:59,458 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] [2019-10-15 01:56:59,459 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -867992578, now seen corresponding path program 1 times [2019-10-15 01:56:59,460 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:59,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049087387] [2019-10-15 01:56:59,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:59,711 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 01:56:59,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049087387] [2019-10-15 01:56:59,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:59,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:59,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534493887] [2019-10-15 01:56:59,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:59,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:59,715 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-15 01:57:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:01,855 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-15 01:57:01,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:01,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-15 01:57:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:01,864 INFO L225 Difference]: With dead ends: 1390 [2019-10-15 01:57:01,864 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:57:01,867 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 01:57:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:57:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-15 01:57:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-15 01:57:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-15 01:57:01,912 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-15 01:57:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:01,913 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-15 01:57:01,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-15 01:57:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:57:01,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:01,917 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, 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] [2019-10-15 01:57:01,918 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash -509383069, now seen corresponding path program 1 times [2019-10-15 01:57:01,918 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:01,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925755373] [2019-10-15 01:57:01,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:02,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925755373] [2019-10-15 01:57:02,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656310972] [2019-10-15 01:57:02,076 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 01:57:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:02,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:02,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:02,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:02,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:02,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492543119] [2019-10-15 01:57:02,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:02,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:02,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:02,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:02,448 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-15 01:57:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:04,480 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-15 01:57:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:04,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-15 01:57:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:04,491 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 01:57:04,491 INFO L226 Difference]: Without dead ends: 1162 [2019-10-15 01:57:04,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-15 01:57:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-15 01:57:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 01:57:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-15 01:57:04,551 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-15 01:57:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:04,551 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-15 01:57:04,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-15 01:57:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:57:04,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:04,556 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 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 01:57:04,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:04,769 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash 919808893, now seen corresponding path program 1 times [2019-10-15 01:57:04,771 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:04,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406401941] [2019-10-15 01:57:04,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:04,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406401941] [2019-10-15 01:57:04,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219502815] [2019-10-15 01:57:04,940 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 01:57:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:05,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:05,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:05,106 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:05,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:05,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 01:57:05,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870730486] [2019-10-15 01:57:05,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:05,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:05,178 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-15 01:57:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:10,017 INFO L93 Difference]: Finished difference Result 3268 states and 5829 transitions. [2019-10-15 01:57:10,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:10,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-15 01:57:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:10,042 INFO L225 Difference]: With dead ends: 3268 [2019-10-15 01:57:10,043 INFO L226 Difference]: Without dead ends: 2121 [2019-10-15 01:57:10,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:57:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2019-10-15 01:57:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2055. [2019-10-15 01:57:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-15 01:57:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3464 transitions. [2019-10-15 01:57:10,128 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3464 transitions. Word has length 111 [2019-10-15 01:57:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:10,130 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3464 transitions. [2019-10-15 01:57:10,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3464 transitions. [2019-10-15 01:57:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:10,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:10,140 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:57:10,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:10,344 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -684891723, now seen corresponding path program 1 times [2019-10-15 01:57:10,346 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:10,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538282716] [2019-10-15 01:57:10,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:10,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:10,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:10,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538282716] [2019-10-15 01:57:10,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834548695] [2019-10-15 01:57:10,509 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 01:57:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:10,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:10,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:10,720 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:10,802 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:10,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:10,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990509342] [2019-10-15 01:57:10,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:10,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:10,805 INFO L87 Difference]: Start difference. First operand 2055 states and 3464 transitions. Second operand 5 states. [2019-10-15 01:57:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:13,197 INFO L93 Difference]: Finished difference Result 5971 states and 10343 transitions. [2019-10-15 01:57:13,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:13,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 01:57:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:13,227 INFO L225 Difference]: With dead ends: 5971 [2019-10-15 01:57:13,228 INFO L226 Difference]: Without dead ends: 3921 [2019-10-15 01:57:13,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-15 01:57:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-15 01:57:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-15 01:57:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5866 transitions. [2019-10-15 01:57:13,343 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5866 transitions. Word has length 115 [2019-10-15 01:57:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:13,343 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5866 transitions. [2019-10-15 01:57:13,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5866 transitions. [2019-10-15 01:57:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:57:13,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:13,349 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:13,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:13,561 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash -396499717, now seen corresponding path program 1 times [2019-10-15 01:57:13,562 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:13,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162733756] [2019-10-15 01:57:13,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:14,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162733756] [2019-10-15 01:57:14,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804248315] [2019-10-15 01:57:14,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:14,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:14,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:14,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:14,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535647356] [2019-10-15 01:57:14,665 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-15 01:57:14,665 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:14,673 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:14,693 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:14,694 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:14,891 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-15 01:57:15,190 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:57:15,369 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:57:15,574 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-15 01:57:15,682 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-15 01:57:17,521 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs