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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:18,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:18,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:18,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:18,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:18,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:18,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:18,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:18,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:18,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:18,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:18,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:18,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:18,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:18,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:18,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:18,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:18,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:18,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:18,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:18,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:18,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:18,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:18,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:18,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:18,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:18,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:18,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:18,157 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 00:05:18,171 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:18,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:18,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:18,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:18,172 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:18,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:18,173 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:18,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:18,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:18,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:18,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:18,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:18,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:18,174 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:18,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:18,174 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:18,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:18,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:18,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:18,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:18,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:18,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:18,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:18,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:18,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:18,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:18,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:18,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:18,177 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 00:05:18,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:18,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:18,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:18,457 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:18,458 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:18,458 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-15 00:05:18,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe5794ac/659427ea072a4ec0bb2c7abcbec8e304/FLAGc61911d3d [2019-10-15 00:05:19,060 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:19,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-15 00:05:19,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe5794ac/659427ea072a4ec0bb2c7abcbec8e304/FLAGc61911d3d [2019-10-15 00:05:19,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fe5794ac/659427ea072a4ec0bb2c7abcbec8e304 [2019-10-15 00:05:19,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:19,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:19,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:19,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:19,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:19,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:19" (1/1) ... [2019-10-15 00:05:19,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:19, skipping insertion in model container [2019-10-15 00:05:19,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:19" (1/1) ... [2019-10-15 00:05:19,384 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:19,442 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:20,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:20,012 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:20,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:20,199 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:20,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20 WrapperNode [2019-10-15 00:05:20,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:20,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:20,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:20,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:20,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:20,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:20,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:20,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:20,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (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 00:05:20,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:20,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:20,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:22,068 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:22,068 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:22,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:22 BoogieIcfgContainer [2019-10-15 00:05:22,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:22,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:22,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:22,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:22,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:19" (1/3) ... [2019-10-15 00:05:22,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7105308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:22, skipping insertion in model container [2019-10-15 00:05:22,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (2/3) ... [2019-10-15 00:05:22,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7105308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:22, skipping insertion in model container [2019-10-15 00:05:22,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:22" (3/3) ... [2019-10-15 00:05:22,078 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-10-15 00:05:22,088 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:22,099 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:22,110 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:22,140 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:22,140 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:22,140 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:22,141 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:22,141 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:22,141 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:22,141 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:22,141 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-15 00:05:22,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:22,175 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:22,177 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-10-15 00:05:22,192 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:22,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192916336] [2019-10-15 00:05:22,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:22,193 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:22,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:22,597 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 00:05:22,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192916336] [2019-10-15 00:05:22,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:22,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:22,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174126734] [2019-10-15 00:05:22,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:22,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:22,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:22,623 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:05:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:23,757 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:05:23,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:23,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-15 00:05:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:23,787 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:05:23,788 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:05:23,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:05:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:05:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:05:23,901 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 59 [2019-10-15 00:05:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:23,902 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:05:23,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:05:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 00:05:23,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:23,908 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 00:05:23,909 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-10-15 00:05:23,909 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:23,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743641772] [2019-10-15 00:05:23,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:23,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:23,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:24,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743641772] [2019-10-15 00:05:24,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:24,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:24,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856557940] [2019-10-15 00:05:24,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:24,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:24,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:24,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:24,146 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:05:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:25,364 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-15 00:05:25,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:25,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-10-15 00:05:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:25,371 INFO L225 Difference]: With dead ends: 1122 [2019-10-15 00:05:25,371 INFO L226 Difference]: Without dead ends: 756 [2019-10-15 00:05:25,373 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 00:05:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-15 00:05:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-15 00:05:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-15 00:05:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-15 00:05:25,441 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 128 [2019-10-15 00:05:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:25,445 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-15 00:05:25,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-15 00:05:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 00:05:25,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:25,455 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 00:05:25,455 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:25,456 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-10-15 00:05:25,456 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:25,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782186889] [2019-10-15 00:05:25,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:25,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:25,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782186889] [2019-10-15 00:05:25,668 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:25,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:25,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892858710] [2019-10-15 00:05:25,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:25,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:25,671 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-15 00:05:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:26,777 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-15 00:05:26,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:26,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-10-15 00:05:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:26,785 INFO L225 Difference]: With dead ends: 1904 [2019-10-15 00:05:26,785 INFO L226 Difference]: Without dead ends: 1158 [2019-10-15 00:05:26,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-15 00:05:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-15 00:05:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-15 00:05:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-15 00:05:26,834 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 129 [2019-10-15 00:05:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:26,834 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-15 00:05:26,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-15 00:05:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 00:05:26,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:26,837 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 00:05:26,837 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-10-15 00:05:26,838 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:26,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609666854] [2019-10-15 00:05:26,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:26,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:26,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:26,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609666854] [2019-10-15 00:05:26,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:26,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:26,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176361244] [2019-10-15 00:05:26,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:26,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:26,972 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-15 00:05:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:28,233 INFO L93 Difference]: Finished difference Result 2882 states and 4163 transitions. [2019-10-15 00:05:28,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:28,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-15 00:05:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:28,250 INFO L225 Difference]: With dead ends: 2882 [2019-10-15 00:05:28,250 INFO L226 Difference]: Without dead ends: 1750 [2019-10-15 00:05:28,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2019-10-15 00:05:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1514. [2019-10-15 00:05:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-15 00:05:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2084 transitions. [2019-10-15 00:05:28,311 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2084 transitions. Word has length 131 [2019-10-15 00:05:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:28,312 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 2084 transitions. [2019-10-15 00:05:28,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2084 transitions. [2019-10-15 00:05:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:05:28,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:28,315 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 00:05:28,315 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-10-15 00:05:28,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:28,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487445525] [2019-10-15 00:05:28,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:28,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:28,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487445525] [2019-10-15 00:05:28,473 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:28,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:28,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35134424] [2019-10-15 00:05:28,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:28,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:28,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:28,475 INFO L87 Difference]: Start difference. First operand 1514 states and 2084 transitions. Second operand 4 states. [2019-10-15 00:05:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:29,756 INFO L93 Difference]: Finished difference Result 4684 states and 6499 transitions. [2019-10-15 00:05:29,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:29,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-15 00:05:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:29,775 INFO L225 Difference]: With dead ends: 4684 [2019-10-15 00:05:29,776 INFO L226 Difference]: Without dead ends: 3176 [2019-10-15 00:05:29,780 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 00:05:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2019-10-15 00:05:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2262. [2019-10-15 00:05:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-10-15 00:05:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3060 transitions. [2019-10-15 00:05:29,855 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3060 transitions. Word has length 132 [2019-10-15 00:05:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:29,855 INFO L462 AbstractCegarLoop]: Abstraction has 2262 states and 3060 transitions. [2019-10-15 00:05:29,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3060 transitions. [2019-10-15 00:05:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-15 00:05:29,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:29,865 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:29,866 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:29,866 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-10-15 00:05:29,866 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:29,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976331527] [2019-10-15 00:05:29,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:29,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:29,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 165 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:30,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976331527] [2019-10-15 00:05:30,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090271918] [2019-10-15 00:05:30,466 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 00:05:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:30,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:05:30,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:30,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-15 00:05:30,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:31,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 104 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:31,603 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:31,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-15 00:05:31,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664047616] [2019-10-15 00:05:31,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:31,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:05:31,605 INFO L87 Difference]: Start difference. First operand 2262 states and 3060 transitions. Second operand 5 states. [2019-10-15 00:05:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:32,823 INFO L93 Difference]: Finished difference Result 4364 states and 5979 transitions. [2019-10-15 00:05:32,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:32,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-10-15 00:05:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:32,841 INFO L225 Difference]: With dead ends: 4364 [2019-10-15 00:05:32,841 INFO L226 Difference]: Without dead ends: 2292 [2019-10-15 00:05:32,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-15 00:05:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2019-10-15 00:05:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2272. [2019-10-15 00:05:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2272 states. [2019-10-15 00:05:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3041 transitions. [2019-10-15 00:05:32,911 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3041 transitions. Word has length 324 [2019-10-15 00:05:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:32,912 INFO L462 AbstractCegarLoop]: Abstraction has 2272 states and 3041 transitions. [2019-10-15 00:05:32,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3041 transitions. [2019-10-15 00:05:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-15 00:05:32,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:32,925 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-15 00:05:33,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:33,131 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-10-15 00:05:33,132 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:33,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105104328] [2019-10-15 00:05:33,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:33,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:33,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 242 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:34,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105104328] [2019-10-15 00:05:34,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348719540] [2019-10-15 00:05:34,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:34,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:05:34,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:34,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 330 proven. 53 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-15 00:05:34,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:34,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:05:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 164 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:35,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [713226113] [2019-10-15 00:05:35,196 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 409 [2019-10-15 00:05:35,245 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:35,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)