/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/Problem02_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:34:22,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:34:22,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:34:22,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:34:22,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:34:22,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:34:22,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:34:22,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:34:22,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:34:22,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:34:22,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:34:22,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:34:22,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:34:22,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:34:22,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:34:22,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:34:22,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:34:22,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:34:22,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:34:22,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:34:22,522 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 22:34:22,536 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:34:22,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:34:22,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:34:22,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:34:22,537 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:34:22,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:34:22,538 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:34:22,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:34:22,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:34:22,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:34:22,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:34:22,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:34:22,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:34:22,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:34:22,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:34:22,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:34:22,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:34:22,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:34:22,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:34:22,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:34:22,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:34:22,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:34:22,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:34:22,542 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 22:34:22,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:34:22,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:34:22,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:34:22,814 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:34:22,815 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:34:22,815 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-11-06 22:34:22,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79eb319f/2cbdc8b8437c4c768f42239e2e5ab11e/FLAG6ccc5387d [2019-11-06 22:34:23,464 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:34:23,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label26.c [2019-11-06 22:34:23,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79eb319f/2cbdc8b8437c4c768f42239e2e5ab11e/FLAG6ccc5387d [2019-11-06 22:34:23,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79eb319f/2cbdc8b8437c4c768f42239e2e5ab11e [2019-11-06 22:34:23,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:34:23,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:34:23,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:23,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:34:23,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:34:23,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23, skipping insertion in model container [2019-11-06 22:34:23,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,758 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:34:23,806 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:34:24,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:24,328 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:34:24,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:24,482 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:34:24,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24 WrapperNode [2019-11-06 22:34:24,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:24,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:34:24,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:34:24,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:34:24,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (1/1) ... [2019-11-06 22:34:24,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:34:24,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:34:24,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:34:24,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:34:24,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (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 22:34:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:34:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:34:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:34:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:34:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:34:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:34:24,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:34:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:34:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:34:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:34:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:34:25,779 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:34:25,780 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:34:25,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:25 BoogieIcfgContainer [2019-11-06 22:34:25,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:34:25,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:34:25,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:34:25,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:34:25,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:34:23" (1/3) ... [2019-11-06 22:34:25,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b862c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:25, skipping insertion in model container [2019-11-06 22:34:25,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:24" (2/3) ... [2019-11-06 22:34:25,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b862c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:25, skipping insertion in model container [2019-11-06 22:34:25,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:25" (3/3) ... [2019-11-06 22:34:25,797 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label26.c [2019-11-06 22:34:25,811 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:34:25,821 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:34:25,835 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:34:25,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:34:25,872 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:34:25,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:34:25,873 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:34:25,873 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:34:25,874 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:34:25,874 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:34:25,874 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:34:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:34:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:34:25,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:25,928 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] [2019-11-06 22:34:25,930 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2085668238, now seen corresponding path program 1 times [2019-11-06 22:34:25,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:25,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079733732] [2019-11-06 22:34:25,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:26,440 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 22:34:26,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079733732] [2019-11-06 22:34:26,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:26,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:26,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068451084] [2019-11-06 22:34:26,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:26,454 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:26,471 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:34:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:27,389 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-11-06 22:34:27,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:27,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-11-06 22:34:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:27,421 INFO L225 Difference]: With dead ends: 615 [2019-11-06 22:34:27,421 INFO L226 Difference]: Without dead ends: 317 [2019-11-06 22:34:27,433 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 22:34:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-11-06 22:34:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-11-06 22:34:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-06 22:34:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-11-06 22:34:27,531 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 142 [2019-11-06 22:34:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:27,532 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-11-06 22:34:27,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-11-06 22:34:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:34:27,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:27,538 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:34:27,538 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2119639181, now seen corresponding path program 1 times [2019-11-06 22:34:27,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:27,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851843445] [2019-11-06 22:34:27,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:27,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851843445] [2019-11-06 22:34:27,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:27,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:34:27,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453242862] [2019-11-06 22:34:27,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:34:27,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:34:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:34:27,746 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-11-06 22:34:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:28,564 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-11-06 22:34:28,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:34:28,564 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-11-06 22:34:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:28,570 INFO L225 Difference]: With dead ends: 962 [2019-11-06 22:34:28,571 INFO L226 Difference]: Without dead ends: 651 [2019-11-06 22:34:28,572 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 22:34:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-11-06 22:34:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-11-06 22:34:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-06 22:34:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 924 transitions. [2019-11-06 22:34:28,649 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 924 transitions. Word has length 157 [2019-11-06 22:34:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:28,650 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 924 transitions. [2019-11-06 22:34:28,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:34:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 924 transitions. [2019-11-06 22:34:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:34:28,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:28,659 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-06 22:34:28,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash 105434168, now seen corresponding path program 1 times [2019-11-06 22:34:28,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:28,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725868018] [2019-11-06 22:34:28,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:34:28,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725868018] [2019-11-06 22:34:28,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134673686] [2019-11-06 22:34:28,812 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 22:34:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:28,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:34:28,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:29,073 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:29,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1225196023] [2019-11-06 22:34:29,169 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 166 [2019-11-06 22:34:29,219 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:34:29,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)