/usr/bin/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/Problem03_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:37:47,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:37:47,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:37:47,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:37:47,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:37:47,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:37:47,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:37:47,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:37:47,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:37:47,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:37:47,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:37:47,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:37:47,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:37:47,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:37:47,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:37:47,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:37:47,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:37:47,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:37:47,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:37:47,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:37:47,532 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 [2019-11-06 22:37:47,553 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:37:47,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:37:47,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:37:47,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:37:47,555 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:37:47,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:37:47,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:37:47,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:37:47,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:37:47,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:37:47,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:37:47,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:37:47,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:37:47,558 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:37:47,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:37:47,559 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:37:47,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:37:47,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:37:47,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:37:47,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:37:47,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:37:47,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:37:47,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:37:47,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:37:47,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:37:47,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:37:47,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:37:47,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:37:47,561 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 [2019-11-06 22:37:47,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:37:47,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:37:47,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:37:47,869 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:37:47,869 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:37:47,870 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-11-06 22:37:47,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7b0532f/1996edb8fd4640c381ad67cca609b82e/FLAG91c7fe5d5 [2019-11-06 22:37:48,589 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:37:48,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-11-06 22:37:48,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7b0532f/1996edb8fd4640c381ad67cca609b82e/FLAG91c7fe5d5 [2019-11-06 22:37:48,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7b0532f/1996edb8fd4640c381ad67cca609b82e [2019-11-06 22:37:48,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:37:48,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:37:48,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:48,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:37:48,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:37:48,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:48" (1/1) ... [2019-11-06 22:37:48,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9f32a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:48, skipping insertion in model container [2019-11-06 22:37:48,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:48" (1/1) ... [2019-11-06 22:37:48,865 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:37:48,950 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:37:49,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:49,791 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:37:50,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:50,195 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:37:50,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50 WrapperNode [2019-11-06 22:37:50,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:50,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:37:50,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:37:50,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:37:50,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (1/1) ... [2019-11-06 22:37:50,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:37:50,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:37:50,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:37:50,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:37:50,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (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 [2019-11-06 22:37:50,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:37:50,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:37:50,412 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:37:50,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:37:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:37:50,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:37:52,336 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:37:52,343 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:37:52,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:52 BoogieIcfgContainer [2019-11-06 22:37:52,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:37:52,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:37:52,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:37:52,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:37:52,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:48" (1/3) ... [2019-11-06 22:37:52,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64761529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:52, skipping insertion in model container [2019-11-06 22:37:52,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:50" (2/3) ... [2019-11-06 22:37:52,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64761529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:52, skipping insertion in model container [2019-11-06 22:37:52,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:52" (3/3) ... [2019-11-06 22:37:52,362 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2019-11-06 22:37:52,376 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:37:52,389 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:37:52,401 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:37:52,451 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:37:52,452 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:37:52,452 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:37:52,453 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:37:52,453 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:37:52,453 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:37:52,454 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:37:52,454 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:37:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:37:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:37:52,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:52,527 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:52,529 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1955035064, now seen corresponding path program 1 times [2019-11-06 22:37:52,546 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:52,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650212950] [2019-11-06 22:37:52,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:53,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650212950] [2019-11-06 22:37:53,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:53,381 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:53,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017619970] [2019-11-06 22:37:53,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:53,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:53,406 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:37:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:54,668 INFO L93 Difference]: Finished difference Result 835 states and 1476 transitions. [2019-11-06 22:37:54,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:54,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-11-06 22:37:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:54,707 INFO L225 Difference]: With dead ends: 835 [2019-11-06 22:37:54,707 INFO L226 Difference]: Without dead ends: 462 [2019-11-06 22:37:54,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-11-06 22:37:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-11-06 22:37:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-11-06 22:37:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-11-06 22:37:54,811 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 173 [2019-11-06 22:37:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:54,812 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-11-06 22:37:54,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-11-06 22:37:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:37:54,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:54,819 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:54,820 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash -209024133, now seen corresponding path program 1 times [2019-11-06 22:37:54,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:54,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383664442] [2019-11-06 22:37:54,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:55,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383664442] [2019-11-06 22:37:55,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:55,120 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:55,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80333169] [2019-11-06 22:37:55,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:55,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:55,124 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-11-06 22:37:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:56,735 INFO L93 Difference]: Finished difference Result 1391 states and 2302 transitions. [2019-11-06 22:37:56,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:37:56,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-11-06 22:37:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:56,744 INFO L225 Difference]: With dead ends: 1391 [2019-11-06 22:37:56,744 INFO L226 Difference]: Without dead ends: 937 [2019-11-06 22:37:56,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-11-06 22:37:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-11-06 22:37:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-11-06 22:37:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-11-06 22:37:56,820 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 182 [2019-11-06 22:37:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:56,822 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-11-06 22:37:56,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-11-06 22:37:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-06 22:37:56,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:56,829 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:56,829 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:56,830 INFO L82 PathProgramCache]: Analyzing trace with hash -963709492, now seen corresponding path program 1 times [2019-11-06 22:37:56,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:56,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617982958] [2019-11-06 22:37:56,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:57,035 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617982958] [2019-11-06 22:37:57,036 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:57,036 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:57,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885000076] [2019-11-06 22:37:57,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:57,037 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:57,038 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-11-06 22:37:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:58,200 INFO L93 Difference]: Finished difference Result 2635 states and 4271 transitions. [2019-11-06 22:37:58,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:58,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-11-06 22:37:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:58,212 INFO L225 Difference]: With dead ends: 2635 [2019-11-06 22:37:58,212 INFO L226 Difference]: Without dead ends: 1742 [2019-11-06 22:37:58,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-11-06 22:37:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-11-06 22:37:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-11-06 22:37:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-11-06 22:37:58,270 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 185 [2019-11-06 22:37:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:58,271 INFO L462 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-11-06 22:37:58,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-11-06 22:37:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 22:37:58,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:58,278 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:58,278 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1171011483, now seen corresponding path program 1 times [2019-11-06 22:37:58,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:58,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174902030] [2019-11-06 22:37:58,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:58,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174902030] [2019-11-06 22:37:58,565 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:58,565 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:58,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032125147] [2019-11-06 22:37:58,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:58,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:58,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:58,567 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-11-06 22:37:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:59,610 INFO L93 Difference]: Finished difference Result 5158 states and 8081 transitions. [2019-11-06 22:37:59,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:59,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-11-06 22:37:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:59,634 INFO L225 Difference]: With dead ends: 5158 [2019-11-06 22:37:59,634 INFO L226 Difference]: Without dead ends: 3427 [2019-11-06 22:37:59,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2019-11-06 22:37:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3405. [2019-11-06 22:37:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2019-11-06 22:37:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5256 transitions. [2019-11-06 22:37:59,748 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5256 transitions. Word has length 205 [2019-11-06 22:37:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:59,749 INFO L462 AbstractCegarLoop]: Abstraction has 3405 states and 5256 transitions. [2019-11-06 22:37:59,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5256 transitions. [2019-11-06 22:37:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 22:37:59,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:59,814 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:59,815 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash -128205864, now seen corresponding path program 1 times [2019-11-06 22:37:59,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:59,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350885555] [2019-11-06 22:37:59,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:00,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350885555] [2019-11-06 22:38:00,080 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:00,080 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:38:00,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539966639] [2019-11-06 22:38:00,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:38:00,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:38:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:38:00,083 INFO L87 Difference]: Start difference. First operand 3405 states and 5256 transitions. Second operand 7 states. [2019-11-06 22:38:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:02,527 INFO L93 Difference]: Finished difference Result 13875 states and 25633 transitions. [2019-11-06 22:38:02,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:38:02,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2019-11-06 22:38:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:02,629 INFO L225 Difference]: With dead ends: 13875 [2019-11-06 22:38:02,629 INFO L226 Difference]: Without dead ends: 10476 [2019-11-06 22:38:02,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:38:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2019-11-06 22:38:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 10288. [2019-11-06 22:38:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10288 states. [2019-11-06 22:38:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 16830 transitions. [2019-11-06 22:38:03,141 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 16830 transitions. Word has length 250 [2019-11-06 22:38:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:03,141 INFO L462 AbstractCegarLoop]: Abstraction has 10288 states and 16830 transitions. [2019-11-06 22:38:03,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:38:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 16830 transitions. [2019-11-06 22:38:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-11-06 22:38:03,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:03,191 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:03,192 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1276991200, now seen corresponding path program 1 times [2019-11-06 22:38:03,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:03,193 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312955951] [2019-11-06 22:38:03,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:03,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312955951] [2019-11-06 22:38:03,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425810018] [2019-11-06 22:38:03,454 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 [2019-11-06 22:38:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:03,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:38:03,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:03,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:38:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:04,050 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:04,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [748369361] [2019-11-06 22:38:04,287 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 265 [2019-11-06 22:38:04,360 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:04,360 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)