java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:47,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:47,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:47,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:47,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:47,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:47,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:47,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:47,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:47,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:47,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:47,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:47,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:47,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:47,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:47,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:47,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:47,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:47,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:47,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:47,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:47,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:47,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:47,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:47,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:47,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:47,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:47,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:47,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:02:47,652 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:47,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:47,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:47,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:47,656 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:47,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:47,657 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:47,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:47,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:47,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:47,661 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:47,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:47,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:47,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:47,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:47,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:47,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:47,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:47,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:47,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:47,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:47,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:47,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:47,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:02:47,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:47,955 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:47,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:47,960 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:47,961 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:47,961 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-15 00:02:48,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cfa0bed/57caf9f4f98847fa95da63e20d3548ab/FLAGc783d0c2c [2019-10-15 00:02:48,664 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:48,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-15 00:02:48,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cfa0bed/57caf9f4f98847fa95da63e20d3548ab/FLAGc783d0c2c [2019-10-15 00:02:48,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cfa0bed/57caf9f4f98847fa95da63e20d3548ab [2019-10-15 00:02:48,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:48,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:48,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:48,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:48,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:48,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:48" (1/1) ... [2019-10-15 00:02:48,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b57f279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:48, skipping insertion in model container [2019-10-15 00:02:48,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:48" (1/1) ... [2019-10-15 00:02:48,957 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:49,028 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:49,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:49,650 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:49,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:49,828 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:49,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49 WrapperNode [2019-10-15 00:02:49,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:49,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:49,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:49,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:49,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... [2019-10-15 00:02:49,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:50,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:50,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:50,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:50,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:50,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:50,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:50,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:52,053 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:52,054 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:52,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:52 BoogieIcfgContainer [2019-10-15 00:02:52,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:52,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:52,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:52,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:52,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:48" (1/3) ... [2019-10-15 00:02:52,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0ed1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:52, skipping insertion in model container [2019-10-15 00:02:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:49" (2/3) ... [2019-10-15 00:02:52,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0ed1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:52, skipping insertion in model container [2019-10-15 00:02:52,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:52" (3/3) ... [2019-10-15 00:02:52,064 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label10.c [2019-10-15 00:02:52,074 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:52,083 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:52,095 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:52,125 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:52,126 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:52,126 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:52,126 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:52,126 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:52,127 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:52,127 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:52,127 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 00:02:52,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:52,173 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] [2019-10-15 00:02:52,175 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash 734030971, now seen corresponding path program 1 times [2019-10-15 00:02:52,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:52,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908691462] [2019-10-15 00:02:52,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:52,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:52,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908691462] [2019-10-15 00:02:52,521 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:52,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:52,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71242852] [2019-10-15 00:02:52,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:52,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:52,547 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:02:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:54,783 INFO L93 Difference]: Finished difference Result 997 states and 1776 transitions. [2019-10-15 00:02:54,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:54,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-10-15 00:02:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:54,807 INFO L225 Difference]: With dead ends: 997 [2019-10-15 00:02:54,807 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 00:02:54,817 INFO L600 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 [2019-10-15 00:02:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 00:02:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-10-15 00:02:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-15 00:02:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-10-15 00:02:54,911 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 28 [2019-10-15 00:02:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:54,911 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-10-15 00:02:54,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-10-15 00:02:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 00:02:54,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:54,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:54,917 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1011694458, now seen corresponding path program 1 times [2019-10-15 00:02:54,918 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:54,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943367274] [2019-10-15 00:02:54,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:54,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:54,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:55,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943367274] [2019-10-15 00:02:55,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:55,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:55,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226735023] [2019-10-15 00:02:55,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:55,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:55,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:55,191 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-10-15 00:02:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:56,734 INFO L93 Difference]: Finished difference Result 1833 states and 2715 transitions. [2019-10-15 00:02:56,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:56,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-10-15 00:02:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:56,745 INFO L225 Difference]: With dead ends: 1833 [2019-10-15 00:02:56,745 INFO L226 Difference]: Without dead ends: 1219 [2019-10-15 00:02:56,747 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 00:02:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-10-15 00:02:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-10-15 00:02:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-15 00:02:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-10-15 00:02:56,829 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 100 [2019-10-15 00:02:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:56,830 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-10-15 00:02:56,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-10-15 00:02:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 00:02:56,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:56,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:56,840 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash -356402163, now seen corresponding path program 1 times [2019-10-15 00:02:56,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:56,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469469172] [2019-10-15 00:02:56,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:56,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:56,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:57,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469469172] [2019-10-15 00:02:57,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:57,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:57,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612966506] [2019-10-15 00:02:57,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:57,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:57,039 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-10-15 00:02:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:58,843 INFO L93 Difference]: Finished difference Result 3552 states and 5208 transitions. [2019-10-15 00:02:58,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:58,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2019-10-15 00:02:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:58,860 INFO L225 Difference]: With dead ends: 3552 [2019-10-15 00:02:58,861 INFO L226 Difference]: Without dead ends: 2358 [2019-10-15 00:02:58,866 INFO L600 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 [2019-10-15 00:02:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-10-15 00:02:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-10-15 00:02:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-10-15 00:02:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-10-15 00:02:58,958 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 101 [2019-10-15 00:02:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:58,959 INFO L462 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-10-15 00:02:58,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-10-15 00:02:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 00:02:58,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:58,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:58,968 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:58,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1268458330, now seen corresponding path program 1 times [2019-10-15 00:02:58,969 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:58,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175168741] [2019-10-15 00:02:58,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:58,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:58,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:59,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175168741] [2019-10-15 00:02:59,237 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:59,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:59,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930821168] [2019-10-15 00:02:59,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:59,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:59,239 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-10-15 00:03:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:02,151 INFO L93 Difference]: Finished difference Result 8027 states and 14009 transitions. [2019-10-15 00:03:02,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:03:02,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2019-10-15 00:03:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:02,244 INFO L225 Difference]: With dead ends: 8027 [2019-10-15 00:03:02,244 INFO L226 Difference]: Without dead ends: 5880 [2019-10-15 00:03:02,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:03:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-10-15 00:03:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-10-15 00:03:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-10-15 00:03:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7404 transitions. [2019-10-15 00:03:02,663 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7404 transitions. Word has length 126 [2019-10-15 00:03:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:02,665 INFO L462 AbstractCegarLoop]: Abstraction has 5142 states and 7404 transitions. [2019-10-15 00:03:02,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7404 transitions. [2019-10-15 00:03:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 00:03:02,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:02,674 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:03:02,675 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1769948106, now seen corresponding path program 1 times [2019-10-15 00:03:02,676 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:02,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994105611] [2019-10-15 00:03:02,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:02,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:02,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:02,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994105611] [2019-10-15 00:03:02,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058162067] [2019-10-15 00:03:02,981 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 00:03:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:03,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:03,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:03,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:03,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [662539537] [2019-10-15 00:03:03,301 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 174 [2019-10-15 00:03:03,380 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:03,381 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)