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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:23,077 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:23,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:23,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:23,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:23,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:23,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:23,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:23,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:23,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:23,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:23,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:23,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:23,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:23,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:23,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:23,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:23,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:23,148 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 01:43:23,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:23,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:23,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:23,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:23,173 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:23,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:23,173 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:23,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:23,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:23,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:23,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:23,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:23,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:23,176 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:23,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:23,177 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:23,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:23,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:23,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:23,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:23,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:23,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:23,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:23,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:23,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:23,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:23,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:23,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:23,180 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 01:43:23,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:23,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:23,529 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:23,531 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:23,531 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:23,532 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-10-15 01:43:23,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a31d987f/6adfee705211444c9cc1ca0d609132bf/FLAG32455cb56 [2019-10-15 01:43:24,292 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:24,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-10-15 01:43:24,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a31d987f/6adfee705211444c9cc1ca0d609132bf/FLAG32455cb56 [2019-10-15 01:43:24,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a31d987f/6adfee705211444c9cc1ca0d609132bf [2019-10-15 01:43:24,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:24,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:24,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:24,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:24,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:24,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:24" (1/1) ... [2019-10-15 01:43:24,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7745b351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:24, skipping insertion in model container [2019-10-15 01:43:24,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:24" (1/1) ... [2019-10-15 01:43:24,612 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:24,702 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:25,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:25,521 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:25,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:25,938 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:25,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25 WrapperNode [2019-10-15 01:43:25,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:25,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:25,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:25,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:25,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:25,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (1/1) ... [2019-10-15 01:43:26,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:26,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:26,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:26,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:26,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (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 01:43:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:29,236 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:29,239 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:29,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:29 BoogieIcfgContainer [2019-10-15 01:43:29,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:29,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:29,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:29,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:29,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:24" (1/3) ... [2019-10-15 01:43:29,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64045d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:29, skipping insertion in model container [2019-10-15 01:43:29,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:25" (2/3) ... [2019-10-15 01:43:29,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64045d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:29, skipping insertion in model container [2019-10-15 01:43:29,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:29" (3/3) ... [2019-10-15 01:43:29,258 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2019-10-15 01:43:29,271 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:29,282 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:29,294 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:29,333 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:29,333 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:29,334 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:29,335 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:29,335 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:29,335 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:29,335 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:29,335 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:29,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:29,382 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 01:43:29,384 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:29,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:29,390 INFO L82 PathProgramCache]: Analyzing trace with hash 136473382, now seen corresponding path program 1 times [2019-10-15 01:43:29,400 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:29,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213851414] [2019-10-15 01:43:29,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:29,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:29,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:30,145 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 01:43:30,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213851414] [2019-10-15 01:43:30,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:30,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:30,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323352055] [2019-10-15 01:43:30,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:30,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:30,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:30,173 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:43:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:31,363 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:43:31,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:31,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:43:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:31,383 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:43:31,383 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:43:31,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:43:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:43:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:43:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-10-15 01:43:31,466 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-10-15 01:43:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:31,467 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-10-15 01:43:31,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-10-15 01:43:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:43:31,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:31,474 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-15 01:43:31,474 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash 558843325, now seen corresponding path program 1 times [2019-10-15 01:43:31,475 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:31,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552756434] [2019-10-15 01:43:31,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:31,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:31,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:31,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552756434] [2019-10-15 01:43:31,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:31,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:31,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514764130] [2019-10-15 01:43:31,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:31,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:31,686 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-10-15 01:43:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:33,154 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-10-15 01:43:33,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:33,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-15 01:43:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:33,164 INFO L225 Difference]: With dead ends: 929 [2019-10-15 01:43:33,165 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:43:33,168 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 01:43:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:43:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-10-15 01:43:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:43:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-10-15 01:43:33,250 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-10-15 01:43:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:33,250 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-10-15 01:43:33,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-10-15 01:43:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:43:33,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:33,257 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 01:43:33,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1532428526, now seen corresponding path program 1 times [2019-10-15 01:43:33,258 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:33,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998073965] [2019-10-15 01:43:33,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:33,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:33,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:33,528 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 01:43:33,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998073965] [2019-10-15 01:43:33,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:33,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:33,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293805718] [2019-10-15 01:43:33,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:33,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:33,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:33,537 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-10-15 01:43:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:34,705 INFO L93 Difference]: Finished difference Result 1793 states and 3387 transitions. [2019-10-15 01:43:34,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:34,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:43:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:34,721 INFO L225 Difference]: With dead ends: 1793 [2019-10-15 01:43:34,721 INFO L226 Difference]: Without dead ends: 1195 [2019-10-15 01:43:34,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-10-15 01:43:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-10-15 01:43:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-10-15 01:43:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2172 transitions. [2019-10-15 01:43:34,803 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2172 transitions. Word has length 161 [2019-10-15 01:43:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:34,804 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2172 transitions. [2019-10-15 01:43:34,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2172 transitions. [2019-10-15 01:43:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:43:34,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:34,811 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:34,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1729521215, now seen corresponding path program 1 times [2019-10-15 01:43:34,812 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:34,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996405099] [2019-10-15 01:43:34,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:34,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:34,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:34,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996405099] [2019-10-15 01:43:34,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765830003] [2019-10-15 01:43:34,952 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 01:43:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:35,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:43:35,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:43:35,371 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:35,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:35,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:43:35,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603987884] [2019-10-15 01:43:35,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:35,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:35,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:35,501 INFO L87 Difference]: Start difference. First operand 1195 states and 2172 transitions. Second operand 5 states. [2019-10-15 01:43:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:36,912 INFO L93 Difference]: Finished difference Result 3669 states and 7031 transitions. [2019-10-15 01:43:36,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:36,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-10-15 01:43:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:36,942 INFO L225 Difference]: With dead ends: 3669 [2019-10-15 01:43:36,942 INFO L226 Difference]: Without dead ends: 2479 [2019-10-15 01:43:36,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:43:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2019-10-15 01:43:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2441. [2019-10-15 01:43:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2441 states. [2019-10-15 01:43:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 4497 transitions. [2019-10-15 01:43:37,192 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 4497 transitions. Word has length 178 [2019-10-15 01:43:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:37,193 INFO L462 AbstractCegarLoop]: Abstraction has 2441 states and 4497 transitions. [2019-10-15 01:43:37,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 4497 transitions. [2019-10-15 01:43:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:43:37,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:37,207 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:37,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:37,415 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1305476158, now seen corresponding path program 1 times [2019-10-15 01:43:37,415 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:37,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353692569] [2019-10-15 01:43:37,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:37,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353692569] [2019-10-15 01:43:37,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772480157] [2019-10-15 01:43:37,596 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 01:43:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:37,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:43:37,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:43:37,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:38,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:38,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:43:38,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643098370] [2019-10-15 01:43:38,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:38,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:43:38,010 INFO L87 Difference]: Start difference. First operand 2441 states and 4497 transitions. Second operand 5 states. [2019-10-15 01:43:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:39,431 INFO L93 Difference]: Finished difference Result 7465 states and 15186 transitions. [2019-10-15 01:43:39,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:43:39,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-10-15 01:43:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:39,477 INFO L225 Difference]: With dead ends: 7465 [2019-10-15 01:43:39,477 INFO L226 Difference]: Without dead ends: 5029 [2019-10-15 01:43:39,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:43:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2019-10-15 01:43:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 4943. [2019-10-15 01:43:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4943 states. [2019-10-15 01:43:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 8925 transitions. [2019-10-15 01:43:39,711 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 8925 transitions. Word has length 179 [2019-10-15 01:43:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:39,712 INFO L462 AbstractCegarLoop]: Abstraction has 4943 states and 8925 transitions. [2019-10-15 01:43:39,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 8925 transitions. [2019-10-15 01:43:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 01:43:39,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:39,732 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:39,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:39,937 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2106578894, now seen corresponding path program 1 times [2019-10-15 01:43:39,940 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:39,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512448570] [2019-10-15 01:43:39,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:39,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:39,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:40,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512448570] [2019-10-15 01:43:40,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101514763] [2019-10-15 01:43:40,072 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 01:43:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:40,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:40,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:40,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:40,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411940288] [2019-10-15 01:43:40,478 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:43:40,479 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:40,486 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:40,494 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:40,495 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:41,264 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 208 for LOIs [2019-10-15 01:43:41,473 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-15 01:43:41,601 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:43:41,880 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:43:42,158 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:43:42,494 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-10-15 01:43:43,492 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2019-10-15 01:43:44,766 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:45,177 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:43:45,433 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-10-15 01:43:45,779 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:46,234 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:43:46,479 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:43:46,590 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:43:46,820 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:43:46,926 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2019-10-15 01:43:47,033 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2019-10-15 01:43:47,298 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 365 [2019-10-15 01:43:47,419 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:43:47,645 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-10-15 01:43:48,067 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:48,391 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:43:48,591 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-10-15 01:43:48,858 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:49,509 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:43:49,612 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:43:49,755 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:43:49,882 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 365 [2019-10-15 01:43:50,164 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2019-10-15 01:43:50,606 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:51,236 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:43:51,341 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-10-15 01:43:52,135 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 214 [2019-10-15 01:43:52,250 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-10-15 01:43:52,354 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:43:52,506 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:43:52,953 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 369 [2019-10-15 01:43:53,178 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2019-10-15 01:43:53,710 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-10-15 01:43:53,962 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-10-15 01:43:54,440 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-10-15 01:43:55,334 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365