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/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:50,209 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:50,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:50,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:50,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:50,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:50,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:50,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:50,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:50,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:50,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:50,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:50,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:50,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:50,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:50,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:50,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:50,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:50,292 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 01:43:50,326 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:50,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:50,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:50,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:50,331 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:50,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:50,331 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:50,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:50,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:50,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:50,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:50,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:50,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:50,334 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:50,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:50,334 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:50,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:50,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:50,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:50,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:50,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:50,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:50,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:50,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:50,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:50,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:50,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:50,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:50,337 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 01:43:50,631 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:50,645 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:50,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:50,650 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:50,651 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:50,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-15 01:43:50,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9843b0e9/b3e36bd008a2404eb6a49bfefd8089e4/FLAG668ae1de0 [2019-10-15 01:43:51,341 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:51,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-15 01:43:51,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9843b0e9/b3e36bd008a2404eb6a49bfefd8089e4/FLAG668ae1de0 [2019-10-15 01:43:51,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9843b0e9/b3e36bd008a2404eb6a49bfefd8089e4 [2019-10-15 01:43:51,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:51,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:51,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:51,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:51,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:51,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:51" (1/1) ... [2019-10-15 01:43:51,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:51, skipping insertion in model container [2019-10-15 01:43:51,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:51" (1/1) ... [2019-10-15 01:43:51,616 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:51,708 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:52,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:52,467 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:52,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:52,810 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:52,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52 WrapperNode [2019-10-15 01:43:52,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:52,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:52,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:52,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:52,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (1/1) ... [2019-10-15 01:43:52,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:52,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:52,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:52,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:52,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (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 01:43:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:56,349 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:56,350 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:56,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:56 BoogieIcfgContainer [2019-10-15 01:43:56,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:56,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:56,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:56,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:56,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:51" (1/3) ... [2019-10-15 01:43:56,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10447de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:56, skipping insertion in model container [2019-10-15 01:43:56,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:52" (2/3) ... [2019-10-15 01:43:56,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10447de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:56, skipping insertion in model container [2019-10-15 01:43:56,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:56" (3/3) ... [2019-10-15 01:43:56,371 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-10-15 01:43:56,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:56,392 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:56,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:56,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:56,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:56,439 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:56,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:56,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:56,440 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:56,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:56,440 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:56,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:56,529 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:56,531 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash 136465702, now seen corresponding path program 1 times [2019-10-15 01:43:56,547 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:56,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922622410] [2019-10-15 01:43:56,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:56,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:56,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:57,316 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 01:43:57,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922622410] [2019-10-15 01:43:57,318 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:57,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:43:57,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183708011] [2019-10-15 01:43:57,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:43:57,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:43:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:43:57,341 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2019-10-15 01:43:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:58,974 INFO L93 Difference]: Finished difference Result 613 states and 1182 transitions. [2019-10-15 01:43:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:43:58,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-15 01:43:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:58,999 INFO L225 Difference]: With dead ends: 613 [2019-10-15 01:43:59,000 INFO L226 Difference]: Without dead ends: 448 [2019-10-15 01:43:59,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:43:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-10-15 01:43:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 301. [2019-10-15 01:43:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:43:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 579 transitions. [2019-10-15 01:43:59,079 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 579 transitions. Word has length 149 [2019-10-15 01:43:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:59,080 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 579 transitions. [2019-10-15 01:43:59,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:43:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 579 transitions. [2019-10-15 01:43:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:43:59,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:59,086 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:59,086 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash -20880474, now seen corresponding path program 1 times [2019-10-15 01:43:59,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:59,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521971714] [2019-10-15 01:43:59,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:59,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:59,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:59,266 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 01:43:59,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521971714] [2019-10-15 01:43:59,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:59,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:43:59,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255343705] [2019-10-15 01:43:59,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:59,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:43:59,270 INFO L87 Difference]: Start difference. First operand 301 states and 579 transitions. Second operand 5 states. [2019-10-15 01:44:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:00,625 INFO L93 Difference]: Finished difference Result 913 states and 1781 transitions. [2019-10-15 01:44:00,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:00,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-15 01:44:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:00,632 INFO L225 Difference]: With dead ends: 913 [2019-10-15 01:44:00,633 INFO L226 Difference]: Without dead ends: 617 [2019-10-15 01:44:00,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-10-15 01:44:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 601. [2019-10-15 01:44:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-10-15 01:44:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1102 transitions. [2019-10-15 01:44:00,696 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1102 transitions. Word has length 157 [2019-10-15 01:44:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:00,696 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 1102 transitions. [2019-10-15 01:44:00,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1102 transitions. [2019-10-15 01:44:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:44:00,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:00,702 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:00,703 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1532436206, now seen corresponding path program 1 times [2019-10-15 01:44:00,704 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:00,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029347645] [2019-10-15 01:44:00,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:00,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:00,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:01,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029347645] [2019-10-15 01:44:01,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912393945] [2019-10-15 01:44:01,088 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 01:44:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:01,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:01,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:01,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:01,645 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:44:01,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-15 01:44:01,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939988297] [2019-10-15 01:44:01,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:01,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:01,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:01,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:01,648 INFO L87 Difference]: Start difference. First operand 601 states and 1102 transitions. Second operand 3 states. [2019-10-15 01:44:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:02,690 INFO L93 Difference]: Finished difference Result 1791 states and 3345 transitions. [2019-10-15 01:44:02,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:02,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:44:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:02,700 INFO L225 Difference]: With dead ends: 1791 [2019-10-15 01:44:02,701 INFO L226 Difference]: Without dead ends: 1195 [2019-10-15 01:44:02,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-10-15 01:44:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1046. [2019-10-15 01:44:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2019-10-15 01:44:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1690 transitions. [2019-10-15 01:44:02,749 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1690 transitions. Word has length 161 [2019-10-15 01:44:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:02,749 INFO L462 AbstractCegarLoop]: Abstraction has 1046 states and 1690 transitions. [2019-10-15 01:44:02,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1690 transitions. [2019-10-15 01:44:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:44:02,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:02,757 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:02,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:02,972 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:02,972 INFO L82 PathProgramCache]: Analyzing trace with hash 634687016, now seen corresponding path program 1 times [2019-10-15 01:44:02,973 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:02,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080100137] [2019-10-15 01:44:02,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:02,974 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:02,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:03,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080100137] [2019-10-15 01:44:03,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114799974] [2019-10-15 01:44:03,139 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 01:44:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:03,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:44:03,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:44:03,522 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:03,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:03,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:03,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143133181] [2019-10-15 01:44:03,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:03,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:03,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:03,696 INFO L87 Difference]: Start difference. First operand 1046 states and 1690 transitions. Second operand 5 states. [2019-10-15 01:44:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:05,058 INFO L93 Difference]: Finished difference Result 2586 states and 4445 transitions. [2019-10-15 01:44:05,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:44:05,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-10-15 01:44:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:05,070 INFO L225 Difference]: With dead ends: 2586 [2019-10-15 01:44:05,070 INFO L226 Difference]: Without dead ends: 1545 [2019-10-15 01:44:05,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 352 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:44:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2019-10-15 01:44:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1523. [2019-10-15 01:44:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2019-10-15 01:44:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2574 transitions. [2019-10-15 01:44:05,164 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2574 transitions. Word has length 179 [2019-10-15 01:44:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:05,165 INFO L462 AbstractCegarLoop]: Abstraction has 1523 states and 2574 transitions. [2019-10-15 01:44:05,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2574 transitions. [2019-10-15 01:44:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:44:05,171 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:05,171 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:44:05,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:05,385 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1771941393, now seen corresponding path program 1 times [2019-10-15 01:44:05,386 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:05,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602810846] [2019-10-15 01:44:05,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:05,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602810846] [2019-10-15 01:44:05,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:05,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:05,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120723856] [2019-10-15 01:44:05,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:05,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:05,557 INFO L87 Difference]: Start difference. First operand 1523 states and 2574 transitions. Second operand 6 states. [2019-10-15 01:44:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:07,015 INFO L93 Difference]: Finished difference Result 3550 states and 6246 transitions. [2019-10-15 01:44:07,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:44:07,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2019-10-15 01:44:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:07,031 INFO L225 Difference]: With dead ends: 3550 [2019-10-15 01:44:07,031 INFO L226 Difference]: Without dead ends: 2032 [2019-10-15 01:44:07,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 01:44:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-10-15 01:44:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2010. [2019-10-15 01:44:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2019-10-15 01:44:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3240 transitions. [2019-10-15 01:44:07,124 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3240 transitions. Word has length 180 [2019-10-15 01:44:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:07,125 INFO L462 AbstractCegarLoop]: Abstraction has 2010 states and 3240 transitions. [2019-10-15 01:44:07,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3240 transitions. [2019-10-15 01:44:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:44:07,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:07,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:44:07,133 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1339448481, now seen corresponding path program 1 times [2019-10-15 01:44:07,134 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:07,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312478650] [2019-10-15 01:44:07,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:07,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312478650] [2019-10-15 01:44:07,283 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:07,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:07,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440015382] [2019-10-15 01:44:07,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:07,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:07,285 INFO L87 Difference]: Start difference. First operand 2010 states and 3240 transitions. Second operand 6 states. [2019-10-15 01:44:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:08,898 INFO L93 Difference]: Finished difference Result 5897 states and 9958 transitions. [2019-10-15 01:44:08,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:08,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-10-15 01:44:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:08,933 INFO L225 Difference]: With dead ends: 5897 [2019-10-15 01:44:08,934 INFO L226 Difference]: Without dead ends: 3892 [2019-10-15 01:44:08,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 01:44:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2019-10-15 01:44:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3272. [2019-10-15 01:44:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3272 states. [2019-10-15 01:44:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5371 transitions. [2019-10-15 01:44:09,086 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5371 transitions. Word has length 183 [2019-10-15 01:44:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:09,088 INFO L462 AbstractCegarLoop]: Abstraction has 3272 states and 5371 transitions. [2019-10-15 01:44:09,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:09,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5371 transitions. [2019-10-15 01:44:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 01:44:09,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:09,103 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:09,104 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -239018380, now seen corresponding path program 1 times [2019-10-15 01:44:09,105 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:09,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054258048] [2019-10-15 01:44:09,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:09,106 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:09,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:09,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054258048] [2019-10-15 01:44:09,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299635569] [2019-10-15 01:44:09,276 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 01:44:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:09,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:44:09,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 01:44:09,539 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:09,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:09,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:09,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7488766] [2019-10-15 01:44:09,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:09,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:09,606 INFO L87 Difference]: Start difference. First operand 3272 states and 5371 transitions. Second operand 5 states. [2019-10-15 01:44:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:11,069 INFO L93 Difference]: Finished difference Result 9606 states and 17002 transitions. [2019-10-15 01:44:11,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:11,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-10-15 01:44:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:11,111 INFO L225 Difference]: With dead ends: 9606 [2019-10-15 01:44:11,112 INFO L226 Difference]: Without dead ends: 6339 [2019-10-15 01:44:11,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:44:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2019-10-15 01:44:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 6098. [2019-10-15 01:44:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6098 states. [2019-10-15 01:44:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 10143 transitions. [2019-10-15 01:44:11,379 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 10143 transitions. Word has length 202 [2019-10-15 01:44:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:11,380 INFO L462 AbstractCegarLoop]: Abstraction has 6098 states and 10143 transitions. [2019-10-15 01:44:11,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 10143 transitions. [2019-10-15 01:44:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-15 01:44:11,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:11,407 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:44:11,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:11,620 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2134020120, now seen corresponding path program 1 times [2019-10-15 01:44:11,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:11,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648295816] [2019-10-15 01:44:11,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:11,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:11,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:11,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648295816] [2019-10-15 01:44:11,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772836156] [2019-10-15 01:44:11,851 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 01:44:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:12,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:12,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:12,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:12,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148739940] [2019-10-15 01:44:12,378 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:12,378 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:12,392 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:12,400 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:12,401 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:13,337 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:44:13,676 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:13,839 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-10-15 01:44:14,004 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:14,285 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:44:14,599 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-10-15 01:44:15,531 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-10-15 01:44:16,787 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:44:17,381 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-10-15 01:44:17,799 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:44:18,425 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:18,533 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:18,792 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-10-15 01:44:18,901 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:19,011 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:19,173 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:19,345 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-10-15 01:44:19,990 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:44:21,090 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:44:21,340 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:21,503 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-10-15 01:44:21,675 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:21,828 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:44:22,306 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:44:23,538 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 364 [2019-10-15 01:44:23,650 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:23,805 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-10-15 01:44:24,224 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 368