/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:28,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:28,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:28,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:28,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:28,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:28,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:28,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:28,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:28,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:28,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:28,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:28,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:28,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:28,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:28,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:28,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:47:28,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:28,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:28,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:28,582 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 22:47:28,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:28,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:28,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:28,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:28,609 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:28,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:28,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:28,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:28,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:28,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:28,612 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:28,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:28,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:28,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:28,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:28,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:28,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:28,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:28,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:28,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:28,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:28,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:28,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:28,615 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 22:47:28,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:28,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:28,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:28,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:28,936 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:28,936 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-11-06 22:47:29,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f89d62f/91d655138539446b884f44ad5aaf6bb6/FLAG39db12a33 [2019-11-06 22:47:29,627 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:29,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-11-06 22:47:29,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f89d62f/91d655138539446b884f44ad5aaf6bb6/FLAG39db12a33 [2019-11-06 22:47:29,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1f89d62f/91d655138539446b884f44ad5aaf6bb6 [2019-11-06 22:47:29,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:29,904 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:29,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:29,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:29,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:29,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:29" (1/1) ... [2019-11-06 22:47:29,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ea6363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:29, skipping insertion in model container [2019-11-06 22:47:29,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:29" (1/1) ... [2019-11-06 22:47:29,919 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:29,990 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:30,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:30,878 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:31,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:31,028 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:31,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31 WrapperNode [2019-11-06 22:47:31,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:31,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:31,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:31,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:31,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (1/1) ... [2019-11-06 22:47:31,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:31,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:31,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:31,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:31,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (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 22:47:31,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:31,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:31,257 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:31,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:31,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:33,031 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:33,031 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:33,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:33 BoogieIcfgContainer [2019-11-06 22:47:33,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:33,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:33,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:33,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:33,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:29" (1/3) ... [2019-11-06 22:47:33,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3782fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:33, skipping insertion in model container [2019-11-06 22:47:33,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:31" (2/3) ... [2019-11-06 22:47:33,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3782fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:33, skipping insertion in model container [2019-11-06 22:47:33,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:33" (3/3) ... [2019-11-06 22:47:33,076 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label43.c [2019-11-06 22:47:33,087 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:33,099 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:33,112 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:33,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:33,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:33,154 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:33,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:33,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:33,155 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:33,155 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:33,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 22:47:33,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:33,198 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:33,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1328885261, now seen corresponding path program 1 times [2019-11-06 22:47:33,216 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:33,217 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508604442] [2019-11-06 22:47:33,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:33,425 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 22:47:33,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508604442] [2019-11-06 22:47:33,427 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:33,427 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:33,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432395794] [2019-11-06 22:47:33,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:33,434 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:33,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:33,451 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:47:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:34,911 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-11-06 22:47:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:34,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 22:47:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:34,931 INFO L225 Difference]: With dead ends: 779 [2019-11-06 22:47:34,931 INFO L226 Difference]: Without dead ends: 425 [2019-11-06 22:47:34,939 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 22:47:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-06 22:47:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-11-06 22:47:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:47:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-11-06 22:47:35,017 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 18 [2019-11-06 22:47:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:35,018 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-11-06 22:47:35,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-11-06 22:47:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:47:35,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:35,024 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:35,025 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1087943286, now seen corresponding path program 1 times [2019-11-06 22:47:35,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:35,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44633214] [2019-11-06 22:47:35,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:35,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44633214] [2019-11-06 22:47:35,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:35,354 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:35,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262400750] [2019-11-06 22:47:35,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:35,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:35,358 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-11-06 22:47:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:38,252 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-11-06 22:47:38,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:47:38,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-11-06 22:47:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:38,265 INFO L225 Difference]: With dead ends: 1665 [2019-11-06 22:47:38,265 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:47:38,268 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 22:47:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:47:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-11-06 22:47:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-11-06 22:47:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-11-06 22:47:38,396 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 88 [2019-11-06 22:47:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:38,397 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-11-06 22:47:38,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-11-06 22:47:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:47:38,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:38,408 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:38,409 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 492940226, now seen corresponding path program 1 times [2019-11-06 22:47:38,409 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:38,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172205897] [2019-11-06 22:47:38,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:38,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172205897] [2019-11-06 22:47:38,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:38,615 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:38,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526373385] [2019-11-06 22:47:38,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:38,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:38,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:38,617 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:47:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:40,590 INFO L93 Difference]: Finished difference Result 3450 states and 5148 transitions. [2019-11-06 22:47:40,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:40,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-11-06 22:47:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:40,622 INFO L225 Difference]: With dead ends: 3450 [2019-11-06 22:47:40,623 INFO L226 Difference]: Without dead ends: 2239 [2019-11-06 22:47:40,634 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 22:47:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2019-11-06 22:47:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2212. [2019-11-06 22:47:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-11-06 22:47:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-11-06 22:47:40,788 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 98 [2019-11-06 22:47:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:40,797 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-11-06 22:47:40,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-11-06 22:47:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:47:40,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:40,808 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:40,808 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:40,810 INFO L82 PathProgramCache]: Analyzing trace with hash 610166376, now seen corresponding path program 1 times [2019-11-06 22:47:40,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:40,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012851578] [2019-11-06 22:47:40,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:41,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012851578] [2019-11-06 22:47:41,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870073253] [2019-11-06 22:47:41,040 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 22:47:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:41,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:47:41,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:41,193 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:41,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [357719352] [2019-11-06 22:47:41,358 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 162 [2019-11-06 22:47:41,414 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:41,414 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:48:06,550 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:48:06,552 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 22:48:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:06,555 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates