/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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:48:13,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:48:13,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:48:13,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:48:13,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:48:13,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:48:13,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:48:13,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:48:13,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:48:13,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:48:13,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:48:13,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:48:14,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:48:14,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:48:14,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:48:14,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:48:14,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:48:14,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:48:14,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:48:14,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:48:14,025 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 22:48:14,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:48:14,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:48:14,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:48:14,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:48:14,053 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:48:14,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:48:14,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:48:14,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:48:14,055 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:48:14,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:48:14,055 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:48:14,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:48:14,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:48:14,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:48:14,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:48:14,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:48:14,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:48:14,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:48:14,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:48:14,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:48:14,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:48:14,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:48:14,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:48:14,058 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 22:48:14,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:48:14,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:48:14,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:48:14,346 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:48:14,347 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:48:14,347 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label58.c [2019-11-06 22:48:14,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5be0a69/c3493687d3c248d589e1996713b8fdd6/FLAG6262c1fac [2019-11-06 22:48:15,026 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:48:15,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label58.c [2019-11-06 22:48:15,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5be0a69/c3493687d3c248d589e1996713b8fdd6/FLAG6262c1fac [2019-11-06 22:48:15,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5be0a69/c3493687d3c248d589e1996713b8fdd6 [2019-11-06 22:48:15,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:48:15,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:48:15,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:15,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:48:15,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:48:15,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:15" (1/1) ... [2019-11-06 22:48:15,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:15, skipping insertion in model container [2019-11-06 22:48:15,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:15" (1/1) ... [2019-11-06 22:48:15,295 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:48:15,366 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:48:16,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:16,056 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:48:16,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:16,221 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:48:16,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16 WrapperNode [2019-11-06 22:48:16,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:16,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:48:16,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:48:16,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:48:16,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (1/1) ... [2019-11-06 22:48:16,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:48:16,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:48:16,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:48:16,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:48:16,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (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 22:48:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:48:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:48:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:48:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:48:16,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:48:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:48:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:48:16,516 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:48:16,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:48:16,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:48:16,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:48:18,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:48:18,406 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:48:18,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:18 BoogieIcfgContainer [2019-11-06 22:48:18,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:48:18,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:48:18,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:48:18,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:48:18,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:15" (1/3) ... [2019-11-06 22:48:18,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:18, skipping insertion in model container [2019-11-06 22:48:18,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:16" (2/3) ... [2019-11-06 22:48:18,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:18, skipping insertion in model container [2019-11-06 22:48:18,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:18" (3/3) ... [2019-11-06 22:48:18,420 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label58.c [2019-11-06 22:48:18,435 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:48:18,448 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:48:18,460 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:48:18,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:48:18,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:48:18,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:48:18,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:48:18,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:48:18,515 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:48:18,515 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:48:18,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:48:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:48:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 22:48:18,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:18,565 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] [2019-11-06 22:48:18,567 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash -806848853, now seen corresponding path program 1 times [2019-11-06 22:48:18,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:18,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695086557] [2019-11-06 22:48:18,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:18,926 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 22:48:18,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695086557] [2019-11-06 22:48:18,928 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:18,928 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:48:18,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114752431] [2019-11-06 22:48:18,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:48:18,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:18,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:48:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:48:18,954 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:48:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:20,456 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-11-06 22:48:20,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:48:20,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-06 22:48:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:20,493 INFO L225 Difference]: With dead ends: 779 [2019-11-06 22:48:20,494 INFO L226 Difference]: Without dead ends: 425 [2019-11-06 22:48:20,507 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 22:48:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-06 22:48:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-11-06 22:48:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:48:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-11-06 22:48:20,633 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 24 [2019-11-06 22:48:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:20,633 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-11-06 22:48:20,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:48:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-11-06 22:48:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:48:20,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:20,638 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:48:20,638 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1993121934, now seen corresponding path program 1 times [2019-11-06 22:48:20,639 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:20,639 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047972168] [2019-11-06 22:48:20,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:20,936 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047972168] [2019-11-06 22:48:20,936 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:20,936 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:20,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756846884] [2019-11-06 22:48:20,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:20,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:20,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:20,942 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-11-06 22:48:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:23,665 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-11-06 22:48:23,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:48:23,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-11-06 22:48:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:23,678 INFO L225 Difference]: With dead ends: 1665 [2019-11-06 22:48:23,678 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:48:23,681 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:48:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:48:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-11-06 22:48:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-11-06 22:48:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-11-06 22:48:23,757 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 94 [2019-11-06 22:48:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:23,758 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-11-06 22:48:23,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-11-06 22:48:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 22:48:23,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:23,761 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:48:23,761 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 611805402, now seen corresponding path program 1 times [2019-11-06 22:48:23,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:23,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947453234] [2019-11-06 22:48:23,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:23,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947453234] [2019-11-06 22:48:23,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:48:23,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:48:23,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301270396] [2019-11-06 22:48:23,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:48:23,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:48:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:48:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:48:23,948 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:48:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:48:25,900 INFO L93 Difference]: Finished difference Result 3448 states and 5147 transitions. [2019-11-06 22:48:25,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:48:25,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-06 22:48:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:48:25,914 INFO L225 Difference]: With dead ends: 3448 [2019-11-06 22:48:25,914 INFO L226 Difference]: Without dead ends: 2237 [2019-11-06 22:48:25,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:48:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-11-06 22:48:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2212. [2019-11-06 22:48:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-11-06 22:48:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3011 transitions. [2019-11-06 22:48:26,017 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3011 transitions. Word has length 104 [2019-11-06 22:48:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:48:26,026 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3011 transitions. [2019-11-06 22:48:26,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:48:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3011 transitions. [2019-11-06 22:48:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 22:48:26,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:48:26,039 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:48:26,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:48:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:26,039 INFO L82 PathProgramCache]: Analyzing trace with hash 978301792, now seen corresponding path program 1 times [2019-11-06 22:48:26,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:48:26,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635393365] [2019-11-06 22:48:26,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:48:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:26,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635393365] [2019-11-06 22:48:26,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005047881] [2019-11-06 22:48:26,260 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 22:48:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:48:26,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:48:26,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:48:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:26,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:48:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:48:26,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1500720117] [2019-11-06 22:48:26,588 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 168 [2019-11-06 22:48:26,647 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:48:26,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:48:53,450 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:48:53,452 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-11-06 22:48:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:53,456 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates