java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:10,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:10,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:10,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:10,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:10,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:10,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:10,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:10,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:10,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:10,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:10,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:10,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:10,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:10,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:10,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:10,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:10,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:10,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:10,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:10,271 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 00:03:10,308 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:10,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:10,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:10,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:10,311 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:10,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:10,314 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:10,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:10,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:10,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:10,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:10,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:10,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:10,316 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:10,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:10,317 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:10,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:10,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:10,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:10,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:10,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:10,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:10,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:10,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:10,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:10,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:10,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:10,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:10,320 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 00:03:10,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:10,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:10,623 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:10,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:10,625 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:10,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-10-15 00:03:10,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074b84ba1/d1d0c1ca66a44c0d9b2371ca724e9416/FLAG5caa9fdab [2019-10-15 00:03:11,329 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:11,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-10-15 00:03:11,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074b84ba1/d1d0c1ca66a44c0d9b2371ca724e9416/FLAG5caa9fdab [2019-10-15 00:03:11,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/074b84ba1/d1d0c1ca66a44c0d9b2371ca724e9416 [2019-10-15 00:03:11,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:11,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:11,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:11,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:11,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:11,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:11" (1/1) ... [2019-10-15 00:03:11,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:11, skipping insertion in model container [2019-10-15 00:03:11,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:11" (1/1) ... [2019-10-15 00:03:11,589 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:11,651 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:12,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:12,289 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:12,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:12,470 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:12,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12 WrapperNode [2019-10-15 00:03:12,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:12,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:12,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:12,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:12,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (1/1) ... [2019-10-15 00:03:12,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:12,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:12,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:12,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:12,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (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 00:03:12,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:12,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:12,699 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:12,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:12,700 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:12,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:12,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:12,700 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:12,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:12,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:12,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:14,457 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:14,459 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:14,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:14 BoogieIcfgContainer [2019-10-15 00:03:14,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:14,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:14,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:14,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:14,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:11" (1/3) ... [2019-10-15 00:03:14,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203e7c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:14, skipping insertion in model container [2019-10-15 00:03:14,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:12" (2/3) ... [2019-10-15 00:03:14,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@203e7c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:14, skipping insertion in model container [2019-10-15 00:03:14,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:14" (3/3) ... [2019-10-15 00:03:14,485 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label17.c [2019-10-15 00:03:14,501 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:14,513 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:14,530 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:14,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:14,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:14,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:14,591 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:14,591 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:14,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:14,592 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:14,592 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 00:03:14,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:14,652 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] [2019-10-15 00:03:14,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2013037499, now seen corresponding path program 1 times [2019-10-15 00:03:14,710 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:14,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418612609] [2019-10-15 00:03:14,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:14,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:14,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:15,154 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 00:03:15,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418612609] [2019-10-15 00:03:15,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:15,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:15,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404306064] [2019-10-15 00:03:15,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:15,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:15,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:15,187 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:03:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:16,758 INFO L93 Difference]: Finished difference Result 787 states and 1379 transitions. [2019-10-15 00:03:16,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:16,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-10-15 00:03:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:16,779 INFO L225 Difference]: With dead ends: 787 [2019-10-15 00:03:16,780 INFO L226 Difference]: Without dead ends: 433 [2019-10-15 00:03:16,788 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 00:03:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-10-15 00:03:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 426. [2019-10-15 00:03:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-15 00:03:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 678 transitions. [2019-10-15 00:03:16,874 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 678 transitions. Word has length 44 [2019-10-15 00:03:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:16,875 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 678 transitions. [2019-10-15 00:03:16,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 678 transitions. [2019-10-15 00:03:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 00:03:16,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:16,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:16,882 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash -697152023, now seen corresponding path program 1 times [2019-10-15 00:03:16,883 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:16,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431131824] [2019-10-15 00:03:16,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:16,883 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:16,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:17,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431131824] [2019-10-15 00:03:17,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:17,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:03:17,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403481168] [2019-10-15 00:03:17,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:17,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:03:17,086 INFO L87 Difference]: Start difference. First operand 426 states and 678 transitions. Second operand 5 states. [2019-10-15 00:03:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:18,791 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-10-15 00:03:18,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:03:18,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-15 00:03:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:18,800 INFO L225 Difference]: With dead ends: 1259 [2019-10-15 00:03:18,800 INFO L226 Difference]: Without dead ends: 839 [2019-10-15 00:03:18,802 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 00:03:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-15 00:03:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 627. [2019-10-15 00:03:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-10-15 00:03:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 934 transitions. [2019-10-15 00:03:18,850 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 934 transitions. Word has length 119 [2019-10-15 00:03:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:18,851 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 934 transitions. [2019-10-15 00:03:18,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 934 transitions. [2019-10-15 00:03:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 00:03:18,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:18,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:18,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:18,858 INFO L82 PathProgramCache]: Analyzing trace with hash 716839870, now seen corresponding path program 1 times [2019-10-15 00:03:18,858 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:18,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542040481] [2019-10-15 00:03:18,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:18,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:18,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:19,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542040481] [2019-10-15 00:03:19,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:19,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:03:19,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959147148] [2019-10-15 00:03:19,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:19,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:03:19,084 INFO L87 Difference]: Start difference. First operand 627 states and 934 transitions. Second operand 5 states. [2019-10-15 00:03:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:20,959 INFO L93 Difference]: Finished difference Result 1872 states and 2846 transitions. [2019-10-15 00:03:20,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:03:20,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-15 00:03:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:20,970 INFO L225 Difference]: With dead ends: 1872 [2019-10-15 00:03:20,971 INFO L226 Difference]: Without dead ends: 1251 [2019-10-15 00:03:20,973 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 00:03:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-15 00:03:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1032. [2019-10-15 00:03:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-15 00:03:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1433 transitions. [2019-10-15 00:03:21,021 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1433 transitions. Word has length 130 [2019-10-15 00:03:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:21,022 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1433 transitions. [2019-10-15 00:03:21,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1433 transitions. [2019-10-15 00:03:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 00:03:21,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:21,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:21,028 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -523045564, now seen corresponding path program 1 times [2019-10-15 00:03:21,029 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:21,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103607469] [2019-10-15 00:03:21,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:21,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:21,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103607469] [2019-10-15 00:03:21,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620264536] [2019-10-15 00:03:21,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:21,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:03:21,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:21,536 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:21,602 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:21,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 00:03:21,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423726707] [2019-10-15 00:03:21,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:21,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:21,604 INFO L87 Difference]: Start difference. First operand 1032 states and 1433 transitions. Second operand 3 states. [2019-10-15 00:03:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:22,813 INFO L93 Difference]: Finished difference Result 2662 states and 3820 transitions. [2019-10-15 00:03:22,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:22,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-10-15 00:03:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:22,824 INFO L225 Difference]: With dead ends: 2662 [2019-10-15 00:03:22,824 INFO L226 Difference]: Without dead ends: 1636 [2019-10-15 00:03:22,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:03:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-10-15 00:03:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1629. [2019-10-15 00:03:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1629 states. [2019-10-15 00:03:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2257 transitions. [2019-10-15 00:03:22,881 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2257 transitions. Word has length 175 [2019-10-15 00:03:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:22,882 INFO L462 AbstractCegarLoop]: Abstraction has 1629 states and 2257 transitions. [2019-10-15 00:03:22,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2257 transitions. [2019-10-15 00:03:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 00:03:22,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:22,886 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:23,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:23,093 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1334961658, now seen corresponding path program 1 times [2019-10-15 00:03:23,094 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:23,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221376677] [2019-10-15 00:03:23,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:23,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:23,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221376677] [2019-10-15 00:03:23,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513620944] [2019-10-15 00:03:23,317 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 00:03:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:23,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:03:23,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-15 00:03:23,492 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:23,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:03:23,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:03:23,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274243188] [2019-10-15 00:03:23,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:23,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:23,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:03:23,642 INFO L87 Difference]: Start difference. First operand 1629 states and 2257 transitions. Second operand 5 states. [2019-10-15 00:03:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:25,156 INFO L93 Difference]: Finished difference Result 4500 states and 6394 transitions. [2019-10-15 00:03:25,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:25,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-10-15 00:03:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:25,174 INFO L225 Difference]: With dead ends: 4500 [2019-10-15 00:03:25,175 INFO L226 Difference]: Without dead ends: 2877 [2019-10-15 00:03:25,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:03:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2019-10-15 00:03:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2825. [2019-10-15 00:03:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-10-15 00:03:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3849 transitions. [2019-10-15 00:03:25,282 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3849 transitions. Word has length 199 [2019-10-15 00:03:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:25,284 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 3849 transitions. [2019-10-15 00:03:25,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3849 transitions. [2019-10-15 00:03:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 00:03:25,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:25,290 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:03:25,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:25,497 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1124795769, now seen corresponding path program 1 times [2019-10-15 00:03:25,498 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:25,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965347955] [2019-10-15 00:03:25,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:25,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965347955] [2019-10-15 00:03:25,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909853457] [2019-10-15 00:03:25,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:25,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:25,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:25,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:25,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2167605] [2019-10-15 00:03:25,998 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-10-15 00:03:26,082 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:26,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)