/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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:48:10,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:48:10,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:48:10,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:48:10,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:48:10,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:48:10,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:48:10,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:48:10,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:48:10,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:48:10,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:48:10,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:48:10,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:48:10,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:48:10,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:48:10,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:48:10,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:48:11,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:48:11,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:48:11,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:48:11,005 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 22:48:11,038 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:48:11,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:48:11,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:48:11,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:48:11,042 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:48:11,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:48:11,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:48:11,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:48:11,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:48:11,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:48:11,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:48:11,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:48:11,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:48:11,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:48:11,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:48:11,045 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:48:11,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:48:11,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:48:11,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:48:11,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:48:11,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:48:11,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:48:11,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:48:11,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:48:11,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:48:11,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:48:11,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:48:11,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:48:11,049 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 22:48:11,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:48:11,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:48:11,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:48:11,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:48:11,347 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:48:11,348 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-06 22:48:11,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1882eff/816077d18d6347a9be00f1390eab5e21/FLAG7ceb36ce0 [2019-11-06 22:48:11,989 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:48:11,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-06 22:48:12,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1882eff/816077d18d6347a9be00f1390eab5e21/FLAG7ceb36ce0 [2019-11-06 22:48:12,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a1882eff/816077d18d6347a9be00f1390eab5e21 [2019-11-06 22:48:12,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:48:12,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:48:12,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:12,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:48:12,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:48:12,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:12" (1/1) ... [2019-11-06 22:48:12,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1e6d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:12, skipping insertion in model container [2019-11-06 22:48:12,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:12" (1/1) ... [2019-11-06 22:48:12,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:48:12,293 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:48:13,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:13,058 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:48:13,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:13,232 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:48:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13 WrapperNode [2019-11-06 22:48:13,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:13,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:48:13,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:48:13,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:48:13,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (1/1) ... [2019-11-06 22:48:13,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:48:13,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:48:13,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:48:13,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:48:13,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (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 22:48:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:48:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:48:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:48:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:48:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:48:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:48:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:48:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:48:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:48:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:48:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:48:15,308 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:48:15,313 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:48:15,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:15 BoogieIcfgContainer [2019-11-06 22:48:15,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:48:15,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:48:15,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:48:15,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:48:15,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:12" (1/3) ... [2019-11-06 22:48:15,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bf82ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:15, skipping insertion in model container [2019-11-06 22:48:15,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:13" (2/3) ... [2019-11-06 22:48:15,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bf82ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:15, skipping insertion in model container [2019-11-06 22:48:15,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:15" (3/3) ... [2019-11-06 22:48:15,333 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-11-06 22:48:15,347 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:48:15,358 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:48:15,372 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:48:15,415 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:48:15,416 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:48:15,416 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:48:15,416 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:48:15,416 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:48:15,417 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:48:15,417 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:48:15,417 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:48:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:48:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 22:48:15,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:15,464 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] [2019-11-06 22:48:15,465 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-11-06 22:48:15,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:15,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168220590] [2019-11-06 22:48:15,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:15,938 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 22:48:15,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168220590] [2019-11-06 22:48:15,940 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:15,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:15,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377634900] [2019-11-06 22:48:15,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:15,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:15,968 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:48:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:18,227 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-11-06 22:48:18,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:18,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-11-06 22:48:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:18,253 INFO L225 Difference]: With dead ends: 975 [2019-11-06 22:48:18,253 INFO L226 Difference]: Without dead ends: 616 [2019-11-06 22:48:18,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-11-06 22:48:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-11-06 22:48:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-11-06 22:48:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-11-06 22:48:18,356 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 51 [2019-11-06 22:48:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:18,357 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-11-06 22:48:18,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-11-06 22:48:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:48:18,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:18,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:18,363 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-11-06 22:48:18,364 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:18,364 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443057591] [2019-11-06 22:48:18,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:18,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443057591] [2019-11-06 22:48:18,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:18,603 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:18,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088580121] [2019-11-06 22:48:18,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:18,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:18,611 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-11-06 22:48:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:20,240 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-11-06 22:48:20,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:48:20,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:48:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:20,247 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:48:20,247 INFO L226 Difference]: Without dead ends: 825 [2019-11-06 22:48:20,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:48:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-11-06 22:48:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-11-06 22:48:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-11-06 22:48:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-11-06 22:48:20,304 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 123 [2019-11-06 22:48:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:20,304 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-11-06 22:48:20,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-11-06 22:48:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:48:20,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:20,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:20,308 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-11-06 22:48:20,309 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:20,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738905845] [2019-11-06 22:48:20,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:20,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738905845] [2019-11-06 22:48:20,471 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:20,471 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:20,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399929317] [2019-11-06 22:48:20,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:20,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:20,473 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 4 states. [2019-11-06 22:48:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:22,320 INFO L93 Difference]: Finished difference Result 2406 states and 3479 transitions. [2019-11-06 22:48:22,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:22,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-06 22:48:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:22,336 INFO L225 Difference]: With dead ends: 2406 [2019-11-06 22:48:22,336 INFO L226 Difference]: Without dead ends: 1598 [2019-11-06 22:48:22,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2019-11-06 22:48:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1393. [2019-11-06 22:48:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2019-11-06 22:48:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1963 transitions. [2019-11-06 22:48:22,435 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1963 transitions. Word has length 124 [2019-11-06 22:48:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:22,445 INFO L462 AbstractCegarLoop]: Abstraction has 1393 states and 1963 transitions. [2019-11-06 22:48:22,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1963 transitions. [2019-11-06 22:48:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 22:48:22,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:22,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:22,458 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-11-06 22:48:22,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:22,459 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94652567] [2019-11-06 22:48:22,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:22,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94652567] [2019-11-06 22:48:22,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001455977] [2019-11-06 22:48:22,743 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 22:48:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:22,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:48:22,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:22,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:23,002 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:23,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:23,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:23,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:23,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:48:23,483 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-06 22:48:23,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157454449] [2019-11-06 22:48:23,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:48:23,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:48:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:48:23,485 INFO L87 Difference]: Start difference. First operand 1393 states and 1963 transitions. Second operand 7 states. [2019-11-06 22:48:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:26,049 INFO L93 Difference]: Finished difference Result 4584 states and 6866 transitions. [2019-11-06 22:48:26,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:48:26,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2019-11-06 22:48:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:26,069 INFO L225 Difference]: With dead ends: 4584 [2019-11-06 22:48:26,070 INFO L226 Difference]: Without dead ends: 3197 [2019-11-06 22:48:26,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:48:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2019-11-06 22:48:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2974. [2019-11-06 22:48:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2974 states. [2019-11-06 22:48:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4002 transitions. [2019-11-06 22:48:26,178 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4002 transitions. Word has length 145 [2019-11-06 22:48:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:26,179 INFO L462 AbstractCegarLoop]: Abstraction has 2974 states and 4002 transitions. [2019-11-06 22:48:26,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:48:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4002 transitions. [2019-11-06 22:48:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-06 22:48:26,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:26,186 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:26,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:48:26,390 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 968484805, now seen corresponding path program 1 times [2019-11-06 22:48:26,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:26,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586793530] [2019-11-06 22:48:26,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:48:26,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586793530] [2019-11-06 22:48:26,687 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:26,687 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:48:26,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569665321] [2019-11-06 22:48:26,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:48:26,688 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:48:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:26,690 INFO L87 Difference]: Start difference. First operand 2974 states and 4002 transitions. Second operand 4 states. [2019-11-06 22:48:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:28,592 INFO L93 Difference]: Finished difference Result 7667 states and 10969 transitions. [2019-11-06 22:48:28,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:48:28,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 273 [2019-11-06 22:48:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:28,629 INFO L225 Difference]: With dead ends: 7667 [2019-11-06 22:48:28,630 INFO L226 Difference]: Without dead ends: 4699 [2019-11-06 22:48:28,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:48:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2019-11-06 22:48:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4498. [2019-11-06 22:48:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-11-06 22:48:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6117 transitions. [2019-11-06 22:48:28,792 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6117 transitions. Word has length 273 [2019-11-06 22:48:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:28,794 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6117 transitions. [2019-11-06 22:48:28,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:48:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6117 transitions. [2019-11-06 22:48:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-06 22:48:28,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:28,803 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:48:28,803 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2139329586, now seen corresponding path program 1 times [2019-11-06 22:48:28,804 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:28,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553163903] [2019-11-06 22:48:28,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 88 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:29,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553163903] [2019-11-06 22:48:29,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507459906] [2019-11-06 22:48:29,347 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 [2019-11-06 22:48:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:29,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:48:29,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:29,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:29,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:29,990 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-11-06 22:48:30,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:30,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:48:30,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:48:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 89 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:30,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1696887573] [2019-11-06 22:48:30,623 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 277 [2019-11-06 22:48:30,670 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:48:30,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)