/usr/bin/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/Problem18_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:45,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:45,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:45,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:56:45,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:56:45,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:56:45,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:56:45,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:56:45,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:56:45,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:56:45,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:56:45,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:56:45,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:45,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:45,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:45,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:45,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:45,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:45,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:45,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:45,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:45,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:45,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:45,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:45,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:45,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:45,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:45,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:45,333 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 [2019-11-06 22:56:45,350 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:45,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:45,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:45,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:45,353 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:45,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:45,356 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:45,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:45,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:45,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:45,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:45,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:45,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:45,358 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:45,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:45,358 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:45,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:45,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:45,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:45,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:45,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:45,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:45,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:45,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:45,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:45,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:45,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:45,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:45,362 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 [2019-11-06 22:56:45,615 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:45,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:45,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:45,633 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:45,634 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:45,635 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-06 22:56:45,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365faff77/9ee3515be76b439c84a34fed2b3f41c8/FLAGff6b5b85f [2019-11-06 22:56:46,435 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:46,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-06 22:56:46,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365faff77/9ee3515be76b439c84a34fed2b3f41c8/FLAGff6b5b85f [2019-11-06 22:56:46,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/365faff77/9ee3515be76b439c84a34fed2b3f41c8 [2019-11-06 22:56:46,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:46,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:46,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:46,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:46,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:46,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:46" (1/1) ... [2019-11-06 22:56:46,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29062f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:46, skipping insertion in model container [2019-11-06 22:56:46,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:46" (1/1) ... [2019-11-06 22:56:46,601 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:46,736 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:48,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:48,106 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:48,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:48,583 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:48,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48 WrapperNode [2019-11-06 22:56:48,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:48,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:48,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:48,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:48,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (1/1) ... [2019-11-06 22:56:48,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:48,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:48,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:48,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:48,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (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 [2019-11-06 22:56:48,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:56:48,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:56:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:48,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:48,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:52,703 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:52,704 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:52,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:52 BoogieIcfgContainer [2019-11-06 22:56:52,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:52,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:52,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:52,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:52,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:46" (1/3) ... [2019-11-06 22:56:52,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134caf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:52, skipping insertion in model container [2019-11-06 22:56:52,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:48" (2/3) ... [2019-11-06 22:56:52,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134caf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:52, skipping insertion in model container [2019-11-06 22:56:52,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:52" (3/3) ... [2019-11-06 22:56:52,734 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-11-06 22:56:52,753 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:52,766 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:52,781 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:52,823 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:52,824 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:52,824 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:52,824 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:52,824 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:52,824 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:52,825 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:52,825 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:56:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 22:56:52,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:52,874 INFO L410 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] [2019-11-06 22:56:52,876 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1487272786, now seen corresponding path program 1 times [2019-11-06 22:56:52,892 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:52,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249202798] [2019-11-06 22:56:52,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:53,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249202798] [2019-11-06 22:56:53,227 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:53,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:56:53,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182716249] [2019-11-06 22:56:53,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:56:53,240 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:53,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:56:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:53,263 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-11-06 22:57:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:00,615 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-11-06 22:57:00,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:00,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-11-06 22:57:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:00,658 INFO L225 Difference]: With dead ends: 2970 [2019-11-06 22:57:00,658 INFO L226 Difference]: Without dead ends: 2114 [2019-11-06 22:57:00,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-11-06 22:57:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-11-06 22:57:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-11-06 22:57:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3476 transitions. [2019-11-06 22:57:00,838 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3476 transitions. Word has length 37 [2019-11-06 22:57:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:00,839 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3476 transitions. [2019-11-06 22:57:00,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3476 transitions. [2019-11-06 22:57:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 22:57:00,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:00,845 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:00,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash -270817417, now seen corresponding path program 1 times [2019-11-06 22:57:00,846 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:00,846 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346483677] [2019-11-06 22:57:00,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:01,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346483677] [2019-11-06 22:57:01,101 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:01,101 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:57:01,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521548844] [2019-11-06 22:57:01,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:01,107 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:57:01,108 INFO L87 Difference]: Start difference. First operand 2114 states and 3476 transitions. Second operand 5 states. [2019-11-06 22:57:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:06,993 INFO L93 Difference]: Finished difference Result 6436 states and 10709 transitions. [2019-11-06 22:57:07,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:07,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-11-06 22:57:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:07,029 INFO L225 Difference]: With dead ends: 6436 [2019-11-06 22:57:07,029 INFO L226 Difference]: Without dead ends: 4328 [2019-11-06 22:57:07,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:57:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-11-06 22:57:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-11-06 22:57:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-11-06 22:57:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6660 transitions. [2019-11-06 22:57:07,155 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6660 transitions. Word has length 106 [2019-11-06 22:57:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:07,156 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6660 transitions. [2019-11-06 22:57:07,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6660 transitions. [2019-11-06 22:57:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:57:07,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:07,159 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:07,160 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1363746410, now seen corresponding path program 1 times [2019-11-06 22:57:07,160 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:07,161 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533743657] [2019-11-06 22:57:07,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:07,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533743657] [2019-11-06 22:57:07,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:07,354 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:07,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22971361] [2019-11-06 22:57:07,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:07,355 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:07,356 INFO L87 Difference]: Start difference. First operand 4296 states and 6660 transitions. Second operand 6 states. [2019-11-06 22:57:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:13,015 INFO L93 Difference]: Finished difference Result 10829 states and 16791 transitions. [2019-11-06 22:57:13,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:13,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-11-06 22:57:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:13,045 INFO L225 Difference]: With dead ends: 10829 [2019-11-06 22:57:13,045 INFO L226 Difference]: Without dead ends: 6539 [2019-11-06 22:57:13,056 INFO L630 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 [2019-11-06 22:57:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-11-06 22:57:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-11-06 22:57:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-11-06 22:57:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8565 transitions. [2019-11-06 22:57:13,240 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8565 transitions. Word has length 133 [2019-11-06 22:57:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:13,241 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8565 transitions. [2019-11-06 22:57:13,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8565 transitions. [2019-11-06 22:57:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-11-06 22:57:13,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:13,249 INFO L410 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, 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] [2019-11-06 22:57:13,250 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash -115419733, now seen corresponding path program 1 times [2019-11-06 22:57:13,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:13,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167983485] [2019-11-06 22:57:13,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:57:13,467 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167983485] [2019-11-06 22:57:13,467 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:13,467 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:57:13,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318179345] [2019-11-06 22:57:13,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:13,469 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:13,470 INFO L87 Difference]: Start difference. First operand 6505 states and 8565 transitions. Second operand 4 states. [2019-11-06 22:57:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:20,175 INFO L93 Difference]: Finished difference Result 25853 states and 35127 transitions. [2019-11-06 22:57:20,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:20,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-11-06 22:57:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:20,280 INFO L225 Difference]: With dead ends: 25853 [2019-11-06 22:57:20,280 INFO L226 Difference]: Without dead ends: 19354 [2019-11-06 22:57:20,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19354 states. [2019-11-06 22:57:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19354 to 18652. [2019-11-06 22:57:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18652 states. [2019-11-06 22:57:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18652 states to 18652 states and 24319 transitions. [2019-11-06 22:57:20,735 INFO L78 Accepts]: Start accepts. Automaton has 18652 states and 24319 transitions. Word has length 212 [2019-11-06 22:57:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:20,740 INFO L462 AbstractCegarLoop]: Abstraction has 18652 states and 24319 transitions. [2019-11-06 22:57:20,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18652 states and 24319 transitions. [2019-11-06 22:57:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-11-06 22:57:20,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:20,749 INFO L410 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, 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, 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] [2019-11-06 22:57:20,749 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -461049505, now seen corresponding path program 1 times [2019-11-06 22:57:20,750 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:20,752 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425862009] [2019-11-06 22:57:20,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:21,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425862009] [2019-11-06 22:57:21,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140446817] [2019-11-06 22:57:21,045 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 [2019-11-06 22:57:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:21,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:57:21,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:21,586 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:21,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2141268297] [2019-11-06 22:57:21,815 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 255 [2019-11-06 22:57:21,869 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:57:21,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)