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/Problem16_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:16,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:16,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:16,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:16,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:16,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:16,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:16,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:16,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:16,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:16,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:16,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:16,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:16,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:16,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:16,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:16,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:16,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:16,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:16,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:16,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:16,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:16,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:16,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:16,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:16,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:16,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:16,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:16,220 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 00:09:16,254 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:16,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:16,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:16,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:16,256 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:16,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:16,257 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:16,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:16,258 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:16,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:16,259 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:16,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:16,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:16,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:16,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:16,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:16,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:16,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:16,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:16,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:16,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:16,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:16,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:16,264 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 00:09:16,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:16,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:16,603 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:16,605 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:16,605 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:16,606 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-10-15 00:09:16,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f70a09e/ed4c2d65867a4f3c86e9988de82fd5e9/FLAG1ab74e7bf [2019-10-15 00:09:17,321 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:17,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label50.c [2019-10-15 00:09:17,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f70a09e/ed4c2d65867a4f3c86e9988de82fd5e9/FLAG1ab74e7bf [2019-10-15 00:09:17,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f70a09e/ed4c2d65867a4f3c86e9988de82fd5e9 [2019-10-15 00:09:17,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:17,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:17,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:17,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:17,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:17,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:17" (1/1) ... [2019-10-15 00:09:17,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ad3bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:17, skipping insertion in model container [2019-10-15 00:09:17,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:17" (1/1) ... [2019-10-15 00:09:17,525 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:17,626 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:18,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:18,453 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:18,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:18,784 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:18,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18 WrapperNode [2019-10-15 00:09:18,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:18,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:18,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:18,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:18,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (1/1) ... [2019-10-15 00:09:18,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:18,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:18,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:18,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:18,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (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 00:09:19,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:19,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:19,040 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:19,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:21,345 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:21,346 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:21,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:21 BoogieIcfgContainer [2019-10-15 00:09:21,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:21,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:21,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:21,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:21,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:17" (1/3) ... [2019-10-15 00:09:21,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c57752f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:21, skipping insertion in model container [2019-10-15 00:09:21,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:18" (2/3) ... [2019-10-15 00:09:21,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c57752f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:21, skipping insertion in model container [2019-10-15 00:09:21,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:21" (3/3) ... [2019-10-15 00:09:21,366 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label50.c [2019-10-15 00:09:21,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:21,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:21,398 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:21,439 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:21,440 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:21,440 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:21,440 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:21,440 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:21,440 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:21,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:21,441 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 00:09:21,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:21,505 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] [2019-10-15 00:09:21,507 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash 789303234, now seen corresponding path program 1 times [2019-10-15 00:09:21,524 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:21,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537267633] [2019-10-15 00:09:21,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:21,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:21,918 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 00:09:21,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537267633] [2019-10-15 00:09:21,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:21,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:09:21,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212898561] [2019-10-15 00:09:21,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:21,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:21,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:09:21,944 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-15 00:09:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:25,721 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-10-15 00:09:25,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:09:25,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-15 00:09:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:25,749 INFO L225 Difference]: With dead ends: 1509 [2019-10-15 00:09:25,750 INFO L226 Difference]: Without dead ends: 1019 [2019-10-15 00:09:25,760 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 00:09:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-15 00:09:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-10-15 00:09:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-10-15 00:09:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-10-15 00:09:25,884 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 51 [2019-10-15 00:09:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:25,884 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-10-15 00:09:25,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:09:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-10-15 00:09:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 00:09:25,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:25,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:25,894 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1245214242, now seen corresponding path program 1 times [2019-10-15 00:09:25,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:25,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079473866] [2019-10-15 00:09:25,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:26,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079473866] [2019-10-15 00:09:26,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:26,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:26,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860462892] [2019-10-15 00:09:26,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:26,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:26,109 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-10-15 00:09:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:28,629 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-10-15 00:09:28,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:28,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-15 00:09:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:28,645 INFO L225 Difference]: With dead ends: 3097 [2019-10-15 00:09:28,645 INFO L226 Difference]: Without dead ends: 2084 [2019-10-15 00:09:28,649 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 00:09:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-10-15 00:09:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-10-15 00:09:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-10-15 00:09:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-10-15 00:09:28,721 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 121 [2019-10-15 00:09:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:28,721 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-10-15 00:09:28,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-10-15 00:09:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 00:09:28,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:28,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:28,729 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1384987622, now seen corresponding path program 1 times [2019-10-15 00:09:28,730 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:28,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173281452] [2019-10-15 00:09:28,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:28,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173281452] [2019-10-15 00:09:28,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:28,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:28,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011033580] [2019-10-15 00:09:28,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:28,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:28,995 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-10-15 00:09:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:31,539 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-10-15 00:09:31,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:31,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-15 00:09:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:31,562 INFO L225 Difference]: With dead ends: 5904 [2019-10-15 00:09:31,562 INFO L226 Difference]: Without dead ends: 3849 [2019-10-15 00:09:31,568 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 00:09:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-10-15 00:09:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-10-15 00:09:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-10-15 00:09:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-10-15 00:09:31,686 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 149 [2019-10-15 00:09:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:31,687 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-10-15 00:09:31,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-10-15 00:09:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 00:09:31,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:31,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:31,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1196358494, now seen corresponding path program 1 times [2019-10-15 00:09:31,691 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:31,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839644737] [2019-10-15 00:09:31,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:31,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839644737] [2019-10-15 00:09:31,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:31,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:31,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948441672] [2019-10-15 00:09:31,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:31,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:31,827 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-10-15 00:09:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:34,128 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-10-15 00:09:34,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:34,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2019-10-15 00:09:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:34,160 INFO L225 Difference]: With dead ends: 9749 [2019-10-15 00:09:34,160 INFO L226 Difference]: Without dead ends: 5942 [2019-10-15 00:09:34,222 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 00:09:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-10-15 00:09:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-10-15 00:09:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-10-15 00:09:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-10-15 00:09:34,398 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 167 [2019-10-15 00:09:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:34,399 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-10-15 00:09:34,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-10-15 00:09:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 00:09:34,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:34,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:34,405 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1753752437, now seen corresponding path program 1 times [2019-10-15 00:09:34,406 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:34,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789418705] [2019-10-15 00:09:34,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:34,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:34,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:34,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789418705] [2019-10-15 00:09:34,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:34,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:34,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943589441] [2019-10-15 00:09:34,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:34,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:34,687 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-10-15 00:09:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:37,201 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-10-15 00:09:37,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:37,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 214 [2019-10-15 00:09:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:37,239 INFO L225 Difference]: With dead ends: 14575 [2019-10-15 00:09:37,240 INFO L226 Difference]: Without dead ends: 8685 [2019-10-15 00:09:37,257 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 00:09:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-10-15 00:09:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-10-15 00:09:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-10-15 00:09:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-10-15 00:09:37,466 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 214 [2019-10-15 00:09:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:37,467 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-10-15 00:09:37,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-10-15 00:09:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-15 00:09:37,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:37,471 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:37,472 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1202654855, now seen corresponding path program 1 times [2019-10-15 00:09:37,473 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:37,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431465650] [2019-10-15 00:09:37,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:37,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:37,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:09:37,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431465650] [2019-10-15 00:09:37,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:37,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:09:37,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922386883] [2019-10-15 00:09:37,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:37,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:37,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:09:37,759 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-10-15 00:09:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:40,725 INFO L93 Difference]: Finished difference Result 23062 states and 30660 transitions. [2019-10-15 00:09:40,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:09:40,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 250 [2019-10-15 00:09:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:40,775 INFO L225 Difference]: With dead ends: 23062 [2019-10-15 00:09:40,775 INFO L226 Difference]: Without dead ends: 14417 [2019-10-15 00:09:40,801 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 00:09:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-10-15 00:09:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-10-15 00:09:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-10-15 00:09:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17470 transitions. [2019-10-15 00:09:41,103 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17470 transitions. Word has length 250 [2019-10-15 00:09:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:41,104 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17470 transitions. [2019-10-15 00:09:41,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:09:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17470 transitions. [2019-10-15 00:09:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-10-15 00:09:41,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:41,130 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:41,131 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1369926926, now seen corresponding path program 1 times [2019-10-15 00:09:41,131 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:41,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772038711] [2019-10-15 00:09:41,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:41,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:41,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:09:41,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772038711] [2019-10-15 00:09:41,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252690431] [2019-10-15 00:09:41,623 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 00:09:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:41,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:41,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 444 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 00:09:42,168 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:09:42,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1469862588] [2019-10-15 00:09:42,493 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 434 [2019-10-15 00:09:42,543 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:42,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:51,608 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:51,609 INFO L272 AbstractInterpreter]: Visited 144 different actions 144 times. Never merged. Never widened. Performed 315 root evaluator evaluations with a maximum evaluation depth of 14. Performed 315 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:51,613 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates