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/Problem10_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:01:47,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:01:47,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:01:47,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 20:01:47,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:01:47,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:01:47,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:01:47,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:01:47,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:01:47,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:01:47,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:01:47,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:01:47,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:01:47,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:01:47,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:01:47,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:01:47,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:01:47,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:01:47,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:01:47,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:01:47,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:01:47,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:01:47,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:01:47,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:01:47,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:01:47,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:01:47,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:01:47,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:01:47,860 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 [2019-10-13 20:01:47,876 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:01:47,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:01:47,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:01:47,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:01:47,878 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:01:47,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:01:47,878 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:01:47,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:01:47,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:01:47,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:01:47,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:01:47,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:01:47,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:01:47,880 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:01:47,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:01:47,880 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:01:47,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:01:47,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:01:47,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:01:47,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:01:47,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:01:47,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:01:47,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:01:47,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:01:47,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:01:47,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:01:47,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:01:47,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:01:47,883 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 [2019-10-13 20:01:48,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:01:48,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:01:48,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:01:48,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:01:48,248 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:01:48,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-10-13 20:01:48,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc91e244e/2d241f164fdf42d395526ddbc218ca5c/FLAG438cb978f [2019-10-13 20:01:48,924 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:01:48,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-10-13 20:01:48,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc91e244e/2d241f164fdf42d395526ddbc218ca5c/FLAG438cb978f [2019-10-13 20:01:49,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc91e244e/2d241f164fdf42d395526ddbc218ca5c [2019-10-13 20:01:49,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:01:49,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:01:49,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:01:49,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:01:49,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:01:49,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:49" (1/1) ... [2019-10-13 20:01:49,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7757f965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:49, skipping insertion in model container [2019-10-13 20:01:49,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:49" (1/1) ... [2019-10-13 20:01:49,270 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:01:49,318 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:01:49,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:01:49,886 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:01:50,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:01:50,067 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:01:50,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50 WrapperNode [2019-10-13 20:01:50,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:01:50,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:01:50,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:01:50,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:01:50,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (1/1) ... [2019-10-13 20:01:50,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:01:50,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:01:50,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:01:50,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:01:50,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (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 [2019-10-13 20:01:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:01:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:01:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:01:50,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:01:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:01:50,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:01:50,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:01:50,287 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:01:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:01:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:01:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:01:51,541 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:01:51,541 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:01:51,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:51 BoogieIcfgContainer [2019-10-13 20:01:51,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:01:51,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:01:51,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:01:51,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:01:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:49" (1/3) ... [2019-10-13 20:01:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e508e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:51, skipping insertion in model container [2019-10-13 20:01:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:50" (2/3) ... [2019-10-13 20:01:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e508e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:51, skipping insertion in model container [2019-10-13 20:01:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:51" (3/3) ... [2019-10-13 20:01:51,567 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label11.c [2019-10-13 20:01:51,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:01:51,590 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:01:51,604 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:01:51,643 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:01:51,643 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:01:51,645 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:01:51,646 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:01:51,646 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:01:51,646 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:01:51,647 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:01:51,647 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:01:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:01:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 20:01:51,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:01:51,700 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] [2019-10-13 20:01:51,704 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:01:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:01:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1918215546, now seen corresponding path program 1 times [2019-10-13 20:01:51,722 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:01:51,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906529300] [2019-10-13 20:01:51,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:51,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:51,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:01:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:52,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906529300] [2019-10-13 20:01:52,057 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:01:52,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:01:52,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720430591] [2019-10-13 20:01:52,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:01:52,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:01:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:01:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:01:52,084 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:01:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:01:53,103 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:01:53,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:01:53,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-10-13 20:01:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:01:53,123 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:01:53,123 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:01:53,130 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 [2019-10-13 20:01:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:01:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:01:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:01:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:01:53,242 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 67 [2019-10-13 20:01:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:01:53,244 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:01:53,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:01:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:01:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 20:01:53,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:01:53,262 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:01:53,262 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:01:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:01:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2016512505, now seen corresponding path program 1 times [2019-10-13 20:01:53,263 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:01:53,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614338740] [2019-10-13 20:01:53,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:53,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:53,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:01:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:53,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614338740] [2019-10-13 20:01:53,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:01:53,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:01:53,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640008153] [2019-10-13 20:01:53,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:01:53,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:01:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:01:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:01:53,604 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 3 states. [2019-10-13 20:01:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:01:54,307 INFO L93 Difference]: Finished difference Result 582 states and 894 transitions. [2019-10-13 20:01:54,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:01:54,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-13 20:01:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:01:54,315 INFO L225 Difference]: With dead ends: 582 [2019-10-13 20:01:54,315 INFO L226 Difference]: Without dead ends: 580 [2019-10-13 20:01:54,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:01:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2019-10-13 20:01:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 294. [2019-10-13 20:01:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:01:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:01:54,341 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 186 [2019-10-13 20:01:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:01:54,342 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:01:54,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:01:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:01:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 20:01:54,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:01:54,346 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:01:54,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:01:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:01:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash -319573275, now seen corresponding path program 1 times [2019-10-13 20:01:54,347 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:01:54,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685615590] [2019-10-13 20:01:54,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:54,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:54,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:01:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:54,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685615590] [2019-10-13 20:01:54,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:01:54,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:01:54,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658905644] [2019-10-13 20:01:54,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:01:54,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:01:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:01:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:01:54,598 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-13 20:01:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:01:55,666 INFO L93 Difference]: Finished difference Result 743 states and 1137 transitions. [2019-10-13 20:01:55,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:01:55,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2019-10-13 20:01:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:01:55,672 INFO L225 Difference]: With dead ends: 743 [2019-10-13 20:01:55,673 INFO L226 Difference]: Without dead ends: 455 [2019-10-13 20:01:55,674 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 [2019-10-13 20:01:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-10-13 20:01:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2019-10-13 20:01:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-10-13 20:01:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 639 transitions. [2019-10-13 20:01:55,695 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 639 transitions. Word has length 192 [2019-10-13 20:01:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:01:55,696 INFO L462 AbstractCegarLoop]: Abstraction has 447 states and 639 transitions. [2019-10-13 20:01:55,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:01:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 639 transitions. [2019-10-13 20:01:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 20:01:55,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:01:55,700 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:01:55,700 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:01:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:01:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1760446162, now seen corresponding path program 1 times [2019-10-13 20:01:55,701 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:01:55,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947293026] [2019-10-13 20:01:55,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:55,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:55,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:01:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:55,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947293026] [2019-10-13 20:01:55,949 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:01:55,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:01:55,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537943058] [2019-10-13 20:01:55,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:01:55,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:01:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:01:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:01:55,951 INFO L87 Difference]: Start difference. First operand 447 states and 639 transitions. Second operand 6 states. [2019-10-13 20:01:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:01:56,870 INFO L93 Difference]: Finished difference Result 1206 states and 1783 transitions. [2019-10-13 20:01:56,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:01:56,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2019-10-13 20:01:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:01:56,878 INFO L225 Difference]: With dead ends: 1206 [2019-10-13 20:01:56,878 INFO L226 Difference]: Without dead ends: 765 [2019-10-13 20:01:56,880 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 [2019-10-13 20:01:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-10-13 20:01:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 749. [2019-10-13 20:01:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2019-10-13 20:01:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1042 transitions. [2019-10-13 20:01:56,911 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1042 transitions. Word has length 193 [2019-10-13 20:01:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:01:56,912 INFO L462 AbstractCegarLoop]: Abstraction has 749 states and 1042 transitions. [2019-10-13 20:01:56,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:01:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1042 transitions. [2019-10-13 20:01:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-13 20:01:56,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:01:56,917 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:01:56,918 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:01:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:01:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash 854527778, now seen corresponding path program 1 times [2019-10-13 20:01:56,918 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:01:56,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326817243] [2019-10-13 20:01:56,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:56,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:01:56,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:01:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:57,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326817243] [2019-10-13 20:01:57,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171284104] [2019-10-13 20:01:57,107 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 [2019-10-13 20:01:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:01:57,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:01:57,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:01:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:57,446 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:01:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:01:57,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [865374385] [2019-10-13 20:01:57,603 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 272 [2019-10-13 20:01:57,660 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:01:57,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:02:09,688 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.