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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:04,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:04,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:04,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:04,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:04,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:04,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:04,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:04,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:04,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:04,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:04,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:04,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:04,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:04,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:04,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:04,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:04,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:04,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:04,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:04,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:04,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:04,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:04,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:04,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:04,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:04,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:04,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:04,698 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 00:10:04,721 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:04,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:04,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:04,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:04,724 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:04,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:04,725 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:04,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:04,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:04,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:04,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:04,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:04,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:04,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:04,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:04,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:04,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:04,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:04,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:04,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:04,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:04,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:04,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:04,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:04,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:04,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:04,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:04,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:04,731 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 00:10:05,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:05,091 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:05,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:05,096 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:05,097 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:05,098 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-15 00:10:05,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f4b4348/4c734891c5844cbb8848980110525de3/FLAGbdb27c7c3 [2019-10-15 00:10:05,909 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:05,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-15 00:10:05,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f4b4348/4c734891c5844cbb8848980110525de3/FLAGbdb27c7c3 [2019-10-15 00:10:06,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f4b4348/4c734891c5844cbb8848980110525de3 [2019-10-15 00:10:06,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:06,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:06,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:06,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:06,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:06,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:06" (1/1) ... [2019-10-15 00:10:06,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3267169b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:06, skipping insertion in model container [2019-10-15 00:10:06,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:06" (1/1) ... [2019-10-15 00:10:06,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:06,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:07,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:07,351 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:07,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:07,905 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:07,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07 WrapperNode [2019-10-15 00:10:07,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:07,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:07,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:07,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:07,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:07,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:07,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:07,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:08,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:08,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:08,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (1/1) ... [2019-10-15 00:10:08,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:08,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:08,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:08,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:08,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (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 00:10:08,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:08,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:08,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:08,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:12,465 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:12,468 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:12,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:12 BoogieIcfgContainer [2019-10-15 00:10:12,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:12,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:12,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:12,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:12,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:06" (1/3) ... [2019-10-15 00:10:12,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269709a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:12, skipping insertion in model container [2019-10-15 00:10:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:07" (2/3) ... [2019-10-15 00:10:12,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269709a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:12, skipping insertion in model container [2019-10-15 00:10:12,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:12" (3/3) ... [2019-10-15 00:10:12,486 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2019-10-15 00:10:12,497 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:12,507 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:12,518 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:12,560 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:12,561 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:12,561 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:12,561 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:12,561 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:12,561 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:12,561 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:12,562 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 00:10:12,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:12,609 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:12,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 835114033, now seen corresponding path program 1 times [2019-10-15 00:10:12,626 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:12,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890439771] [2019-10-15 00:10:12,626 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:12,626 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:12,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:12,969 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 00:10:12,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890439771] [2019-10-15 00:10:12,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:12,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:12,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616232305] [2019-10-15 00:10:12,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:12,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:12,997 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:17,690 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:17,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:17,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-10-15 00:10:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:17,792 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:17,792 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:17,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:10:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:17,977 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 68 [2019-10-15 00:10:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:17,979 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:17,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:10:17,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:17,994 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:17,994 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash 506598757, now seen corresponding path program 1 times [2019-10-15 00:10:17,995 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:17,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159108551] [2019-10-15 00:10:17,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:18,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159108551] [2019-10-15 00:10:18,244 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:18,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:18,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749793058] [2019-10-15 00:10:18,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:18,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:18,248 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:23,551 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:23,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:23,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:10:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:23,573 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:23,573 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:23,578 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 00:10:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4749 transitions. [2019-10-15 00:10:23,736 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4749 transitions. Word has length 141 [2019-10-15 00:10:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:23,738 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4749 transitions. [2019-10-15 00:10:23,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4749 transitions. [2019-10-15 00:10:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:10:23,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:23,750 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:23,750 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 288076576, now seen corresponding path program 1 times [2019-10-15 00:10:23,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:23,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171332752] [2019-10-15 00:10:23,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:23,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171332752] [2019-10-15 00:10:23,947 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:23,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:23,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136762594] [2019-10-15 00:10:23,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:23,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:23,949 INFO L87 Difference]: Start difference. First operand 2864 states and 4749 transitions. Second operand 5 states. [2019-10-15 00:10:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:29,813 INFO L93 Difference]: Finished difference Result 8754 states and 14707 transitions. [2019-10-15 00:10:29,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:10:29,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2019-10-15 00:10:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:29,848 INFO L225 Difference]: With dead ends: 8754 [2019-10-15 00:10:29,848 INFO L226 Difference]: Without dead ends: 5896 [2019-10-15 00:10:29,855 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 00:10:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2019-10-15 00:10:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5815. [2019-10-15 00:10:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2019-10-15 00:10:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8477 transitions. [2019-10-15 00:10:30,016 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8477 transitions. Word has length 144 [2019-10-15 00:10:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:30,017 INFO L462 AbstractCegarLoop]: Abstraction has 5815 states and 8477 transitions. [2019-10-15 00:10:30,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8477 transitions. [2019-10-15 00:10:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 00:10:30,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:30,020 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:30,020 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash 647429316, now seen corresponding path program 1 times [2019-10-15 00:10:30,021 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:30,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059859620] [2019-10-15 00:10:30,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:30,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:30,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:30,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059859620] [2019-10-15 00:10:30,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:30,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:30,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651775953] [2019-10-15 00:10:30,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:30,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:30,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:30,149 INFO L87 Difference]: Start difference. First operand 5815 states and 8477 transitions. Second operand 4 states. [2019-10-15 00:10:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:36,270 INFO L93 Difference]: Finished difference Result 20913 states and 32003 transitions. [2019-10-15 00:10:36,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:36,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-15 00:10:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:36,354 INFO L225 Difference]: With dead ends: 20913 [2019-10-15 00:10:36,355 INFO L226 Difference]: Without dead ends: 15104 [2019-10-15 00:10:36,372 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 00:10:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15104 states. [2019-10-15 00:10:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15104 to 15099. [2019-10-15 00:10:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15099 states. [2019-10-15 00:10:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15099 states to 15099 states and 21133 transitions. [2019-10-15 00:10:36,776 INFO L78 Accepts]: Start accepts. Automaton has 15099 states and 21133 transitions. Word has length 174 [2019-10-15 00:10:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:36,778 INFO L462 AbstractCegarLoop]: Abstraction has 15099 states and 21133 transitions. [2019-10-15 00:10:36,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15099 states and 21133 transitions. [2019-10-15 00:10:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-10-15 00:10:36,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:36,795 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:36,795 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash -138076367, now seen corresponding path program 1 times [2019-10-15 00:10:36,796 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:36,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278847967] [2019-10-15 00:10:36,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:36,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:36,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-15 00:10:37,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278847967] [2019-10-15 00:10:37,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28668869] [2019-10-15 00:10:37,355 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 00:10:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:37,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:37,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-10-15 00:10:37,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 183 proven. 191 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-15 00:10:38,124 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:38,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:10:38,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545413823] [2019-10-15 00:10:38,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:38,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:38,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:38,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:10:38,126 INFO L87 Difference]: Start difference. First operand 15099 states and 21133 transitions. Second operand 5 states.