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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:56,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:56,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:56,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:00:56,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:56,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:56,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:56,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:56,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:56,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:56,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:56,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:56,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:56,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:56,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:56,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:56,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:56,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:56,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:56,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:56,722 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 00:00:56,740 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:56,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:56,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:56,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:56,742 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:56,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:56,742 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:56,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:56,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:56,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:56,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:56,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:56,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:56,745 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:56,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:56,745 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:56,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:56,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:56,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:56,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:56,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:56,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:56,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:56,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:56,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:56,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:56,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:56,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:56,748 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 00:00:57,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:57,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:57,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:57,031 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:57,031 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:57,032 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label21.c [2019-10-15 00:00:57,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc1a2242/78fdfe67cd9142099dc52cc4734224d8/FLAG53ac15f0a [2019-10-15 00:00:57,656 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:57,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label21.c [2019-10-15 00:00:57,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc1a2242/78fdfe67cd9142099dc52cc4734224d8/FLAG53ac15f0a [2019-10-15 00:00:57,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc1a2242/78fdfe67cd9142099dc52cc4734224d8 [2019-10-15 00:00:57,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:57,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:57,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:57,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:57,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:57,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,942 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 15.10 12:00:57, skipping insertion in model container [2019-10-15 00:00:57,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:57" (1/1) ... [2019-10-15 00:00:57,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:57,998 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:58,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:58,547 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:58,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:58,695 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:58,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58 WrapperNode [2019-10-15 00:00:58,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:58,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:58,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:58,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:58,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (1/1) ... [2019-10-15 00:00:58,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:58,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:58,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:58,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:58,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (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 00:00:58,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:58,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:58,867 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:00,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:00,138 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:00,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:00 BoogieIcfgContainer [2019-10-15 00:01:00,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:00,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:00,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:00,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:00,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:57" (1/3) ... [2019-10-15 00:01:00,146 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 15.10 12:01:00, skipping insertion in model container [2019-10-15 00:01:00,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:58" (2/3) ... [2019-10-15 00:01:00,146 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 15.10 12:01:00, skipping insertion in model container [2019-10-15 00:01:00,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:00" (3/3) ... [2019-10-15 00:01:00,149 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label21.c [2019-10-15 00:01:00,160 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:00,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:00,180 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:00,213 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:00,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:00,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:00,214 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:00,217 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:00,217 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:00,218 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:00,218 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 00:01:00,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:00,258 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] [2019-10-15 00:01:00,260 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash -689743650, now seen corresponding path program 1 times [2019-10-15 00:01:00,271 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:00,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059718220] [2019-10-15 00:01:00,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,551 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 00:01:00,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059718220] [2019-10-15 00:01:00,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:00,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:01:00,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257427313] [2019-10-15 00:01:00,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:01:00,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:01:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:00,577 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:01:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:01,579 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:01:01,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:01,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-15 00:01:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:01,605 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:01:01,605 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:01:01,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:01:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:01:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:01:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:01,692 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 33 [2019-10-15 00:01:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:01,693 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:01,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 00:01:01,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:01,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:01,704 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1458033486, now seen corresponding path program 1 times [2019-10-15 00:01:01,705 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:01,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100727662] [2019-10-15 00:01:01,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:01,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:01,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100727662] [2019-10-15 00:01:01,953 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:01,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:01:01,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242007227] [2019-10-15 00:01:01,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:01,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:01,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:01,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:01,957 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-15 00:01:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:02,879 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-10-15 00:01:02,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:02,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 00:01:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:02,884 INFO L225 Difference]: With dead ends: 888 [2019-10-15 00:01:02,884 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 00:01:02,886 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 00:01:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 00:01:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 447. [2019-10-15 00:01:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-10-15 00:01:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 661 transitions. [2019-10-15 00:01:02,919 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 661 transitions. Word has length 115 [2019-10-15 00:01:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:02,919 INFO L462 AbstractCegarLoop]: Abstraction has 447 states and 661 transitions. [2019-10-15 00:01:02,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 661 transitions. [2019-10-15 00:01:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 00:01:02,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:02,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:02,923 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1013478446, now seen corresponding path program 1 times [2019-10-15 00:01:02,924 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:02,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967274938] [2019-10-15 00:01:02,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:03,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967274938] [2019-10-15 00:01:03,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:03,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:03,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789826147] [2019-10-15 00:01:03,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:03,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:03,182 INFO L87 Difference]: Start difference. First operand 447 states and 661 transitions. Second operand 6 states. [2019-10-15 00:01:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:04,043 INFO L93 Difference]: Finished difference Result 1200 states and 1824 transitions. [2019-10-15 00:01:04,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:04,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-10-15 00:01:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:04,051 INFO L225 Difference]: With dead ends: 1200 [2019-10-15 00:01:04,052 INFO L226 Difference]: Without dead ends: 759 [2019-10-15 00:01:04,053 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 [2019-10-15 00:01:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-10-15 00:01:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 745. [2019-10-15 00:01:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-15 00:01:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1096 transitions. [2019-10-15 00:01:04,097 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1096 transitions. Word has length 131 [2019-10-15 00:01:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:04,098 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1096 transitions. [2019-10-15 00:01:04,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1096 transitions. [2019-10-15 00:01:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 00:01:04,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:04,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:04,103 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:04,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1627642498, now seen corresponding path program 1 times [2019-10-15 00:01:04,104 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:04,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296155176] [2019-10-15 00:01:04,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:04,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:04,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296155176] [2019-10-15 00:01:04,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:04,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:04,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522921789] [2019-10-15 00:01:04,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:04,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:04,337 INFO L87 Difference]: Start difference. First operand 745 states and 1096 transitions. Second operand 6 states. [2019-10-15 00:01:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:05,244 INFO L93 Difference]: Finished difference Result 1814 states and 2766 transitions. [2019-10-15 00:01:05,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:05,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-15 00:01:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:05,254 INFO L225 Difference]: With dead ends: 1814 [2019-10-15 00:01:05,254 INFO L226 Difference]: Without dead ends: 1075 [2019-10-15 00:01:05,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-10-15 00:01:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1047. [2019-10-15 00:01:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-15 00:01:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1430 transitions. [2019-10-15 00:01:05,296 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1430 transitions. Word has length 155 [2019-10-15 00:01:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:05,297 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1430 transitions. [2019-10-15 00:01:05,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1430 transitions. [2019-10-15 00:01:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-15 00:01:05,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:05,303 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, 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] [2019-10-15 00:01:05,303 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:05,304 INFO L82 PathProgramCache]: Analyzing trace with hash 418106165, now seen corresponding path program 1 times [2019-10-15 00:01:05,304 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:05,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481917001] [2019-10-15 00:01:05,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:05,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:05,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481917001] [2019-10-15 00:01:05,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124948157] [2019-10-15 00:01:05,852 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 00:01:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:05,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:05,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,073 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:06,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2109732303] [2019-10-15 00:01:06,268 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 195 [2019-10-15 00:01:06,327 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:06,328 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:18,305 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 00:01:34,236 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:01:34,239 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. [2019-10-15 00:01:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:34,243 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates