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/Problem14_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:36,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:36,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:36,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:05:36,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:36,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:36,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:36,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:36,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:36,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:36,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:36,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:36,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:36,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:36,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:36,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:36,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:36,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:36,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:36,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:36,178 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 [2019-10-15 00:05:36,206 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:36,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:36,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:36,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:36,210 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:36,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:36,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:36,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:36,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:36,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:36,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:36,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:36,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:36,213 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:36,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:36,214 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:36,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:36,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:36,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:36,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:36,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:36,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:36,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:36,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:36,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:36,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:36,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:36,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:36,216 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 [2019-10-15 00:05:36,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:36,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:36,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:36,541 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:36,541 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:36,542 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-15 00:05:36,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a47c657/7b89870b00ce471983b4e99555e933bb/FLAGcefa9a805 [2019-10-15 00:05:37,168 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:37,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-15 00:05:37,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a47c657/7b89870b00ce471983b4e99555e933bb/FLAGcefa9a805 [2019-10-15 00:05:37,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a47c657/7b89870b00ce471983b4e99555e933bb [2019-10-15 00:05:37,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:37,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:37,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:37,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:37,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:37,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:37" (1/1) ... [2019-10-15 00:05:37,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:37, skipping insertion in model container [2019-10-15 00:05:37,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:37" (1/1) ... [2019-10-15 00:05:37,445 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:37,511 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:38,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:38,129 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:38,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:38,308 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:38,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38 WrapperNode [2019-10-15 00:05:38,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:38,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:38,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:38,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:38,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (1/1) ... [2019-10-15 00:05:38,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:38,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:38,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:38,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:38,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (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 [2019-10-15 00:05:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:39,998 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:39,998 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:40,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:39 BoogieIcfgContainer [2019-10-15 00:05:40,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:40,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:40,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:40,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:37" (1/3) ... [2019-10-15 00:05:40,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a32289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:40, skipping insertion in model container [2019-10-15 00:05:40,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:38" (2/3) ... [2019-10-15 00:05:40,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a32289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:40, skipping insertion in model container [2019-10-15 00:05:40,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:39" (3/3) ... [2019-10-15 00:05:40,009 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2019-10-15 00:05:40,018 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:40,027 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:40,038 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:40,067 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:40,067 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:40,068 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:40,068 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:40,068 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:40,068 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:40,069 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:40,069 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 00:05:40,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:40,102 INFO L380 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] [2019-10-15 00:05:40,103 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:40,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2013862189, now seen corresponding path program 1 times [2019-10-15 00:05:40,119 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:40,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615448964] [2019-10-15 00:05:40,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:40,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:40,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:40,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615448964] [2019-10-15 00:05:40,427 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:40,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:40,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306505807] [2019-10-15 00:05:40,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:40,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:40,453 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:05:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:42,367 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-15 00:05:42,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:42,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 00:05:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:42,387 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:05:42,387 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:05:42,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:05:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-15 00:05:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-15 00:05:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-15 00:05:42,489 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 32 [2019-10-15 00:05:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:42,490 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-15 00:05:42,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-15 00:05:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:05:42,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:42,498 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:42,499 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1275083330, now seen corresponding path program 1 times [2019-10-15 00:05:42,500 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:42,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782742188] [2019-10-15 00:05:42,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:42,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:42,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:42,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782742188] [2019-10-15 00:05:42,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:42,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:42,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357620933] [2019-10-15 00:05:42,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:42,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:42,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:42,789 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-15 00:05:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:44,351 INFO L93 Difference]: Finished difference Result 2194 states and 3253 transitions. [2019-10-15 00:05:44,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:44,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 00:05:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:44,363 INFO L225 Difference]: With dead ends: 2194 [2019-10-15 00:05:44,363 INFO L226 Difference]: Without dead ends: 1646 [2019-10-15 00:05:44,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-15 00:05:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-15 00:05:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-15 00:05:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2329 transitions. [2019-10-15 00:05:44,443 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2329 transitions. Word has length 144 [2019-10-15 00:05:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:44,444 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2329 transitions. [2019-10-15 00:05:44,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2329 transitions. [2019-10-15 00:05:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-15 00:05:44,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:44,458 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:44,459 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1544408570, now seen corresponding path program 1 times [2019-10-15 00:05:44,459 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:44,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468955241] [2019-10-15 00:05:44,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:44,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:44,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:44,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468955241] [2019-10-15 00:05:44,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786657124] [2019-10-15 00:05:44,769 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 [2019-10-15 00:05:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:44,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:05:44,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:44,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 00:05:45,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:45,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:05:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 50 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:45,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:45,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-15 00:05:45,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805523812] [2019-10-15 00:05:45,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:45,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:45,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:05:45,669 INFO L87 Difference]: Start difference. First operand 1646 states and 2329 transitions. Second operand 5 states. [2019-10-15 00:05:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:47,081 INFO L93 Difference]: Finished difference Result 3878 states and 5438 transitions. [2019-10-15 00:05:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:05:47,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-10-15 00:05:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:47,100 INFO L225 Difference]: With dead ends: 3878 [2019-10-15 00:05:47,100 INFO L226 Difference]: Without dead ends: 2238 [2019-10-15 00:05:47,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:05:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2019-10-15 00:05:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1678. [2019-10-15 00:05:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1678 states. [2019-10-15 00:05:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2292 transitions. [2019-10-15 00:05:47,193 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2292 transitions. Word has length 217 [2019-10-15 00:05:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:47,196 INFO L462 AbstractCegarLoop]: Abstraction has 1678 states and 2292 transitions. [2019-10-15 00:05:47,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2292 transitions. [2019-10-15 00:05:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-15 00:05:47,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:47,203 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:47,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:47,409 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1655155903, now seen corresponding path program 1 times [2019-10-15 00:05:47,411 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:47,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453602433] [2019-10-15 00:05:47,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:47,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:47,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:05:47,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453602433] [2019-10-15 00:05:47,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465380229] [2019-10-15 00:05:47,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:47,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:05:47,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:47,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:48,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [836018] [2019-10-15 00:05:48,024 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 245 [2019-10-15 00:05:48,095 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:05:48,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:05:57,129 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:05:57,131 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Performed 267 root evaluator evaluations with a maximum evaluation depth of 13. Performed 267 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:05:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:57,135 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:06,384 INFO L227 lantSequenceWeakener]: Weakened 225 states. On average, predicates are now at 77.68% of their original sizes. [2019-10-15 00:06:06,385 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:06,464 INFO L553 sIntCurrentIteration]: We unified 243 AI predicates to 243 [2019-10-15 00:06:06,464 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:06,465 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:06,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-15 00:06:06,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853266727] [2019-10-15 00:06:06,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:06:06,467 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:06,468 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:06:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:06:06,468 INFO L87 Difference]: Start difference. First operand 1678 states and 2292 transitions. Second operand 10 states.