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/Problem14_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:05,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:05,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:05,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:05,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:05,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:05,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:05,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:05,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:05,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:05,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:05,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:05,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:05,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:05,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:05,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:05,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:05,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:05,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:05,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:05,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:05,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:05,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:05,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:05,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:05,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:05,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:05,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:05,833 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 00:06:05,847 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:05,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:05,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:05,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:05,849 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:05,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:05,850 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:05,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:05,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:05,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:05,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:05,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:05,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:05,851 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:05,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:05,851 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:05,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:05,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:05,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:05,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:05,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:05,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:05,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:05,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:05,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:05,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:05,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:05,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:05,854 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 00:06:06,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:06,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:06,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:06,150 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:06,150 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:06,151 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-15 00:06:06,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990e30eea/220457824fea4f3a8b96b423e3a02760/FLAG385b1f290 [2019-10-15 00:06:06,873 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:06,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28.c [2019-10-15 00:06:06,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990e30eea/220457824fea4f3a8b96b423e3a02760/FLAG385b1f290 [2019-10-15 00:06:07,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/990e30eea/220457824fea4f3a8b96b423e3a02760 [2019-10-15 00:06:07,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:07,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:07,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:07,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:07,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:07,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:07" (1/1) ... [2019-10-15 00:06:07,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d868ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:07, skipping insertion in model container [2019-10-15 00:06:07,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:07" (1/1) ... [2019-10-15 00:06:07,211 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:07,272 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:08,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:08,110 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:08,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:08,300 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:08,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08 WrapperNode [2019-10-15 00:06:08,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:08,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:08,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:08,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:08,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (1/1) ... [2019-10-15 00:06:08,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:08,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:08,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:08,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:08,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (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 00:06:08,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:08,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:08,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:08,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:10,076 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:10,077 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:10,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:10 BoogieIcfgContainer [2019-10-15 00:06:10,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:10,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:10,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:10,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:10,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:07" (1/3) ... [2019-10-15 00:06:10,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51539e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:10, skipping insertion in model container [2019-10-15 00:06:10,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:08" (2/3) ... [2019-10-15 00:06:10,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51539e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:10, skipping insertion in model container [2019-10-15 00:06:10,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:10" (3/3) ... [2019-10-15 00:06:10,088 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label28.c [2019-10-15 00:06:10,099 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:10,108 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:10,121 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:10,148 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:10,148 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:10,149 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:10,149 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:10,149 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:10,149 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:10,149 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:10,149 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 00:06:10,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:10,180 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:06:10,182 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1694474349, now seen corresponding path program 1 times [2019-10-15 00:06:10,197 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:10,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523780191] [2019-10-15 00:06:10,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:10,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:10,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:10,425 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 00:06:10,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523780191] [2019-10-15 00:06:10,428 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:10,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:10,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882617144] [2019-10-15 00:06:10,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:10,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:10,454 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:06:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:12,478 INFO L93 Difference]: Finished difference Result 890 states and 1606 transitions. [2019-10-15 00:06:12,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:12,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-15 00:06:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:12,501 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:06:12,502 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:06:12,511 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 00:06:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:06:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-10-15 00:06:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-15 00:06:12,588 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 16 [2019-10-15 00:06:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:12,589 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-15 00:06:12,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-15 00:06:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 00:06:12,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:12,594 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:06:12,595 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:12,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1881013151, now seen corresponding path program 1 times [2019-10-15 00:06:12,596 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:12,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534969713] [2019-10-15 00:06:12,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:12,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:12,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:13,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534969713] [2019-10-15 00:06:13,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:13,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:13,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862341520] [2019-10-15 00:06:13,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:13,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:13,069 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 6 states. [2019-10-15 00:06:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:14,525 INFO L93 Difference]: Finished difference Result 948 states and 1313 transitions. [2019-10-15 00:06:14,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:06:14,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-10-15 00:06:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:14,532 INFO L225 Difference]: With dead ends: 948 [2019-10-15 00:06:14,532 INFO L226 Difference]: Without dead ends: 582 [2019-10-15 00:06:14,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:06:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-10-15 00:06:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 566. [2019-10-15 00:06:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-15 00:06:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 747 transitions. [2019-10-15 00:06:14,580 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 747 transitions. Word has length 99 [2019-10-15 00:06:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:14,581 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 747 transitions. [2019-10-15 00:06:14,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 747 transitions. [2019-10-15 00:06:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:06:14,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:14,585 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:06:14,585 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2144779955, now seen corresponding path program 1 times [2019-10-15 00:06:14,586 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:14,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002831841] [2019-10-15 00:06:14,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:14,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:14,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:14,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002831841] [2019-10-15 00:06:14,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:14,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:14,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593054608] [2019-10-15 00:06:14,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:14,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:14,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:14,741 INFO L87 Difference]: Start difference. First operand 566 states and 747 transitions. Second operand 3 states. [2019-10-15 00:06:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:15,644 INFO L93 Difference]: Finished difference Result 1494 states and 2014 transitions. [2019-10-15 00:06:15,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:06:15,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-15 00:06:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:15,651 INFO L225 Difference]: With dead ends: 1494 [2019-10-15 00:06:15,652 INFO L226 Difference]: Without dead ends: 934 [2019-10-15 00:06:15,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2019-10-15 00:06:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2019-10-15 00:06:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-15 00:06:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1192 transitions. [2019-10-15 00:06:15,689 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1192 transitions. Word has length 125 [2019-10-15 00:06:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:15,689 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1192 transitions. [2019-10-15 00:06:15,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:06:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1192 transitions. [2019-10-15 00:06:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 00:06:15,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:15,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:15,694 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash 386406922, now seen corresponding path program 1 times [2019-10-15 00:06:15,695 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:15,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010448916] [2019-10-15 00:06:15,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:15,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:15,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:15,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010448916] [2019-10-15 00:06:15,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:15,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:15,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141735109] [2019-10-15 00:06:15,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:15,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:15,894 INFO L87 Difference]: Start difference. First operand 934 states and 1192 transitions. Second operand 6 states. [2019-10-15 00:06:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:17,241 INFO L93 Difference]: Finished difference Result 2266 states and 3056 transitions. [2019-10-15 00:06:17,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:17,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-15 00:06:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:17,255 INFO L225 Difference]: With dead ends: 2266 [2019-10-15 00:06:17,255 INFO L226 Difference]: Without dead ends: 1520 [2019-10-15 00:06:17,259 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 00:06:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2019-10-15 00:06:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1498. [2019-10-15 00:06:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1498 states. [2019-10-15 00:06:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1870 transitions. [2019-10-15 00:06:17,327 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1870 transitions. Word has length 156 [2019-10-15 00:06:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:17,329 INFO L462 AbstractCegarLoop]: Abstraction has 1498 states and 1870 transitions. [2019-10-15 00:06:17,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1870 transitions. [2019-10-15 00:06:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 00:06:17,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:17,338 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:06:17,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash -380685670, now seen corresponding path program 1 times [2019-10-15 00:06:17,339 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:17,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775063486] [2019-10-15 00:06:17,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:17,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:17,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:18,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775063486] [2019-10-15 00:06:18,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595243867] [2019-10-15 00:06:18,082 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 00:06:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:18,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:06:18,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:18,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:18,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:18,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:18,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1458742441] [2019-10-15 00:06:18,989 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 184 [2019-10-15 00:06:19,040 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:19,040 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:24,043 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:24,046 INFO L272 AbstractInterpreter]: Visited 92 different actions 179 times. Merged at 4 different actions 5 times. Never widened. Performed 398 root evaluator evaluations with a maximum evaluation depth of 13. Performed 398 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:06:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:24,050 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:25,781 INFO L227 lantSequenceWeakener]: Weakened 180 states. On average, predicates are now at 77.22% of their original sizes. [2019-10-15 00:06:25,781 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:25,863 INFO L553 sIntCurrentIteration]: We unified 182 AI predicates to 182 [2019-10-15 00:06:25,863 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:25,864 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:25,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-15 00:06:25,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935257381] [2019-10-15 00:06:25,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:06:25,866 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:25,866 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:06:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:06:25,867 INFO L87 Difference]: Start difference. First operand 1498 states and 1870 transitions. Second operand 11 states.