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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:48,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:48,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:48,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:48,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:48,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:48,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:48,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:48,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:48,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:48,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:48,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:48,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:48,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:48,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:48,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:48,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:48,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:48,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:48,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:48,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:48,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:48,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:48,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:48,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:48,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:48,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:48,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:48,944 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 00:02:48,963 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:48,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:48,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:48,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:48,966 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:48,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:48,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:48,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:48,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:48,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:48,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:48,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:48,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:48,968 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:48,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:48,969 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:48,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:48,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:48,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:48,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:48,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:48,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:48,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:48,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:48,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:48,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:48,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:48,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:48,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:02:49,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:49,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:49,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:49,271 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:49,271 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:49,272 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-15 00:02:49,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f094923e/8ea4307255f247b9914ec7a6c4bae9f9/FLAGc306fe1dd [2019-10-15 00:02:49,962 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:49,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-15 00:02:49,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f094923e/8ea4307255f247b9914ec7a6c4bae9f9/FLAGc306fe1dd [2019-10-15 00:02:50,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f094923e/8ea4307255f247b9914ec7a6c4bae9f9 [2019-10-15 00:02:50,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:50,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:50,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:50,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:50,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:50,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:50" (1/1) ... [2019-10-15 00:02:50,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50, skipping insertion in model container [2019-10-15 00:02:50,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:50" (1/1) ... [2019-10-15 00:02:50,207 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:50,275 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:50,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:50,873 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:51,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:51,169 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:51,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51 WrapperNode [2019-10-15 00:02:51,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:51,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:51,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:51,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:51,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... [2019-10-15 00:02:51,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:51,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:51,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:51,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:51,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:53,352 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:53,353 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:53,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:53 BoogieIcfgContainer [2019-10-15 00:02:53,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:53,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:53,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:53,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:50" (1/3) ... [2019-10-15 00:02:53,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b7f079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:53, skipping insertion in model container [2019-10-15 00:02:53,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:51" (2/3) ... [2019-10-15 00:02:53,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b7f079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:53, skipping insertion in model container [2019-10-15 00:02:53,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:53" (3/3) ... [2019-10-15 00:02:53,364 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2019-10-15 00:02:53,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:53,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:53,397 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:53,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:53,466 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:53,466 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:53,466 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:53,466 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:53,467 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:53,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:53,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 00:02:53,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:53,505 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] [2019-10-15 00:02:53,506 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times [2019-10-15 00:02:53,523 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:53,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619659220] [2019-10-15 00:02:53,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:53,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:53,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:53,788 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 00:02:53,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619659220] [2019-10-15 00:02:53,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:53,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:53,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964685460] [2019-10-15 00:02:53,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:53,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:53,813 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:02:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:55,264 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-10-15 00:02:55,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:55,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-15 00:02:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:55,288 INFO L225 Difference]: With dead ends: 787 [2019-10-15 00:02:55,288 INFO L226 Difference]: Without dead ends: 433 [2019-10-15 00:02:55,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-10-15 00:02:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-10-15 00:02:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-15 00:02:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-10-15 00:02:55,421 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 31 [2019-10-15 00:02:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:55,421 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-10-15 00:02:55,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-10-15 00:02:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-15 00:02:55,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:55,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:55,428 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times [2019-10-15 00:02:55,429 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:55,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999237007] [2019-10-15 00:02:55,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:55,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:55,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:55,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999237007] [2019-10-15 00:02:55,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:55,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:02:55,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252494528] [2019-10-15 00:02:55,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:55,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:55,699 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-10-15 00:02:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:57,375 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-10-15 00:02:57,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:57,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-10-15 00:02:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:57,386 INFO L225 Difference]: With dead ends: 1259 [2019-10-15 00:02:57,386 INFO L226 Difference]: Without dead ends: 839 [2019-10-15 00:02:57,388 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 00:02:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-15 00:02:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-10-15 00:02:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-10-15 00:02:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-10-15 00:02:57,436 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 106 [2019-10-15 00:02:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:57,437 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-10-15 00:02:57,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-10-15 00:02:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 00:02:57,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:57,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:57,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -855314794, now seen corresponding path program 1 times [2019-10-15 00:02:57,442 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:57,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680027096] [2019-10-15 00:02:57,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:57,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:57,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:57,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680027096] [2019-10-15 00:02:57,589 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:57,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:02:57,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512346037] [2019-10-15 00:02:57,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:57,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:02:57,591 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-10-15 00:02:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:59,422 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-10-15 00:02:59,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:59,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-10-15 00:02:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:59,433 INFO L225 Difference]: With dead ends: 1872 [2019-10-15 00:02:59,433 INFO L226 Difference]: Without dead ends: 1251 [2019-10-15 00:02:59,435 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 00:02:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-15 00:02:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-10-15 00:02:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-15 00:02:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-10-15 00:02:59,476 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 117 [2019-10-15 00:02:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:59,477 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-10-15 00:02:59,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-10-15 00:02:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 00:02:59,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:59,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:59,483 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:59,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times [2019-10-15 00:02:59,484 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:59,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286811738] [2019-10-15 00:02:59,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:59,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:59,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:59,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286811738] [2019-10-15 00:02:59,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927029284] [2019-10-15 00:02:59,768 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 00:02:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:59,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:59,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:59,950 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:00,023 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:00,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 00:03:00,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824251657] [2019-10-15 00:03:00,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:00,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:00,026 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-10-15 00:03:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:01,073 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-10-15 00:03:01,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:01,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-15 00:03:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:01,084 INFO L225 Difference]: With dead ends: 2662 [2019-10-15 00:03:01,084 INFO L226 Difference]: Without dead ends: 1636 [2019-10-15 00:03:01,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-10-15 00:03:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-10-15 00:03:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-10-15 00:03:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-10-15 00:03:01,137 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 162 [2019-10-15 00:03:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:01,138 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-10-15 00:03:01,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-10-15 00:03:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 00:03:01,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:01,143 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:01,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:01,349 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1078800445, now seen corresponding path program 1 times [2019-10-15 00:03:01,350 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:01,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640385601] [2019-10-15 00:03:01,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:01,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:01,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:01,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640385601] [2019-10-15 00:03:01,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819602664] [2019-10-15 00:03:01,535 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 00:03:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:01,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:03:01,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 00:03:01,709 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:01,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:03:01,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:03:01,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241161567] [2019-10-15 00:03:01,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:01,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:03:01,817 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-10-15 00:03:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:03,406 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-10-15 00:03:03,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:03,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-15 00:03:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:03,431 INFO L225 Difference]: With dead ends: 4500 [2019-10-15 00:03:03,431 INFO L226 Difference]: Without dead ends: 2877 [2019-10-15 00:03:03,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:03:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-10-15 00:03:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-10-15 00:03:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-10-15 00:03:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-10-15 00:03:03,529 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 186 [2019-10-15 00:03:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:03,530 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-10-15 00:03:03,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-10-15 00:03:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-15 00:03:03,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:03,536 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:03,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:03,741 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times [2019-10-15 00:03:03,741 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:03,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2236531] [2019-10-15 00:03:03,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:03,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:03,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:03,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2236531] [2019-10-15 00:03:03,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541810064] [2019-10-15 00:03:03,960 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 00:03:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:04,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:04,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:04,130 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:04,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [725669996] [2019-10-15 00:03:04,305 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-10-15 00:03:04,376 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:04,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)