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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:02:02,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:02:02,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:02:02,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:02:02,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:02:02,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:02:02,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:02:02,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:02:02,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:02:02,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:02:02,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:02:02,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:02:02,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:02:02,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:02:02,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:02:02,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:02:02,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:02:02,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:02:02,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:02:02,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:02:02,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:02:02,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:02:02,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:02:02,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:02:02,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:02:02,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:02:02,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:02:02,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:02:02,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:02:02,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:02:02,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:02:02,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:02:02,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:02:02,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:02:02,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:02:02,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:02:02,378 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 20:02:02,393 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:02:02,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:02:02,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:02:02,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:02:02,395 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:02:02,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:02:02,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:02:02,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:02:02,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:02:02,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:02:02,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:02:02,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:02:02,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:02:02,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:02:02,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:02:02,397 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:02:02,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:02:02,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:02:02,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:02:02,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:02:02,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:02:02,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:02:02,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:02:02,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:02:02,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:02:02,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:02:02,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:02:02,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:02:02,399 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 20:02:02,677 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:02:02,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:02:02,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:02:02,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:02:02,705 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:02:02,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-13 20:02:02,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7448c83bb/a25ebd4da9ff4f2994e6d0144db16c71/FLAG849f69737 [2019-10-13 20:02:03,324 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:02:03,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-13 20:02:03,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7448c83bb/a25ebd4da9ff4f2994e6d0144db16c71/FLAG849f69737 [2019-10-13 20:02:03,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7448c83bb/a25ebd4da9ff4f2994e6d0144db16c71 [2019-10-13 20:02:03,634 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:02:03,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:02:03,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:03,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:02:03,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:02:03,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:03" (1/1) ... [2019-10-13 20:02:03,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dea371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:03, skipping insertion in model container [2019-10-13 20:02:03,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:03" (1/1) ... [2019-10-13 20:02:03,655 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:02:03,712 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:02:04,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:04,246 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:02:04,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:04,386 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:02:04,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04 WrapperNode [2019-10-13 20:02:04,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:04,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:02:04,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:02:04,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:02:04,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (1/1) ... [2019-10-13 20:02:04,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:02:04,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:02:04,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:02:04,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:02:04,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (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 20:02:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:02:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:02:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:02:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:02:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:02:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:02:05,810 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:02:05,811 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:02:05,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:05 BoogieIcfgContainer [2019-10-13 20:02:05,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:02:05,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:02:05,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:02:05,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:02:05,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:03" (1/3) ... [2019-10-13 20:02:05,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5589c8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:05, skipping insertion in model container [2019-10-13 20:02:05,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:04" (2/3) ... [2019-10-13 20:02:05,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5589c8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:05, skipping insertion in model container [2019-10-13 20:02:05,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:05" (3/3) ... [2019-10-13 20:02:05,820 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label23.c [2019-10-13 20:02:05,830 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:02:05,838 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:02:05,849 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:02:05,876 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:02:05,876 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:02:05,876 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:02:05,877 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:02:05,877 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:02:05,877 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:02:05,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:02:05,878 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:02:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:02:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 20:02:05,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:05,917 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] [2019-10-13 20:02:05,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2063812481, now seen corresponding path program 1 times [2019-10-13 20:02:05,934 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:05,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059718220] [2019-10-13 20:02:05,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:05,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:05,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:06,272 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 20:02:06,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059718220] [2019-10-13 20:02:06,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:06,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:02:06,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257427313] [2019-10-13 20:02:06,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:02:06,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:02:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:02:06,298 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:02:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:07,252 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:02:07,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:02:07,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-13 20:02:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:07,288 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:02:07,288 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:02:07,300 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 20:02:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:02:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:02:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:02:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:02:07,384 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 52 [2019-10-13 20:02:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:07,384 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:02:07,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:02:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:02:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:02:07,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:07,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:07,392 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:07,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1911288886, now seen corresponding path program 1 times [2019-10-13 20:02:07,393 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:07,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538356733] [2019-10-13 20:02:07,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:07,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:07,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:07,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538356733] [2019-10-13 20:02:07,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:07,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:02:07,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138792890] [2019-10-13 20:02:07,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:02:07,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:02:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:02:07,646 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-13 20:02:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:08,587 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-10-13 20:02:08,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:02:08,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-10-13 20:02:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:08,594 INFO L225 Difference]: With dead ends: 888 [2019-10-13 20:02:08,595 INFO L226 Difference]: Without dead ends: 600 [2019-10-13 20:02:08,596 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 20:02:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-13 20:02:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2019-10-13 20:02:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-13 20:02:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-10-13 20:02:08,649 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 134 [2019-10-13 20:02:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:08,650 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-10-13 20:02:08,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:02:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-10-13 20:02:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:02:08,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:08,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:08,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 614464170, now seen corresponding path program 1 times [2019-10-13 20:02:08,659 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:08,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649335492] [2019-10-13 20:02:08,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:08,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:08,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:08,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649335492] [2019-10-13 20:02:08,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:08,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:08,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753477053] [2019-10-13 20:02:08,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:08,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:08,900 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-10-13 20:02:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:09,744 INFO L93 Difference]: Finished difference Result 1490 states and 2245 transitions. [2019-10-13 20:02:09,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:09,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 20:02:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:09,753 INFO L225 Difference]: With dead ends: 1490 [2019-10-13 20:02:09,753 INFO L226 Difference]: Without dead ends: 904 [2019-10-13 20:02:09,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:02:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-13 20:02:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-10-13 20:02:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-13 20:02:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-10-13 20:02:09,795 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 150 [2019-10-13 20:02:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:09,795 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-10-13 20:02:09,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-10-13 20:02:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 20:02:09,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:09,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:09,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 628433146, now seen corresponding path program 1 times [2019-10-13 20:02:09,806 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:09,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160426079] [2019-10-13 20:02:09,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:09,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:09,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:10,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160426079] [2019-10-13 20:02:10,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:10,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:10,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275886319] [2019-10-13 20:02:10,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:10,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:10,040 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-10-13 20:02:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:10,901 INFO L93 Difference]: Finished difference Result 2104 states and 3183 transitions. [2019-10-13 20:02:10,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:10,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-10-13 20:02:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:10,913 INFO L225 Difference]: With dead ends: 2104 [2019-10-13 20:02:10,913 INFO L226 Difference]: Without dead ends: 1220 [2019-10-13 20:02:10,917 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 20:02:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-10-13 20:02:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-10-13 20:02:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 20:02:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-10-13 20:02:11,005 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 174 [2019-10-13 20:02:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:11,006 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-10-13 20:02:11,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-10-13 20:02:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 20:02:11,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:11,011 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, 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] [2019-10-13 20:02:11,011 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 880887528, now seen corresponding path program 1 times [2019-10-13 20:02:11,012 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:11,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456988457] [2019-10-13 20:02:11,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:11,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:11,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:11,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456988457] [2019-10-13 20:02:11,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045743483] [2019-10-13 20:02:11,458 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 20:02:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:11,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:02:11,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:02:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:11,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:02:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:11,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [579213861] [2019-10-13 20:02:11,899 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 214 [2019-10-13 20:02:11,961 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:02:11,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:02:23,977 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 20:02:39,797 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:02:39,799 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:02:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:39,803 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates