/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/Problem01_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:30:12,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:30:12,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:30:12,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:30:13,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:30:13,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:30:13,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:30:13,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:30:13,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:30:13,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:30:13,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:30:13,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:30:13,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:30:13,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:30:13,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:30:13,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:30:13,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:30:13,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:30:13,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:30:13,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:30:13,028 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 22:30:13,042 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:30:13,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:30:13,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:30:13,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:30:13,044 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:30:13,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:30:13,044 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:30:13,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:30:13,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:30:13,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:30:13,046 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:30:13,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:30:13,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:30:13,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:30:13,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:30:13,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:30:13,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:30:13,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:30:13,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:30:13,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:30:13,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:30:13,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:30:13,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:30:13,048 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 22:30:13,310 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:30:13,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:30:13,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:30:13,326 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:30:13,327 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:30:13,327 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2019-11-06 22:30:13,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7bb82cf/0f275e65d03249c0af2e6c9df505754c/FLAG70ef3c75a [2019-11-06 22:30:13,993 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:30:13,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2019-11-06 22:30:14,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7bb82cf/0f275e65d03249c0af2e6c9df505754c/FLAG70ef3c75a [2019-11-06 22:30:14,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7bb82cf/0f275e65d03249c0af2e6c9df505754c [2019-11-06 22:30:14,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:30:14,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:30:14,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:14,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:30:14,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:30:14,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:14,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45118ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14, skipping insertion in model container [2019-11-06 22:30:14,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:14,245 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:30:14,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:30:14,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:14,811 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:30:14,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:14,973 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:30:14,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14 WrapperNode [2019-11-06 22:30:14,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:14,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:30:14,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:30:14,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:30:14,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:14,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (1/1) ... [2019-11-06 22:30:15,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:30:15,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:30:15,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:30:15,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:30:15,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (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 22:30:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:30:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:30:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:30:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:30:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:30:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:30:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:30:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:30:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:30:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:30:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:16,276 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:16,278 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:16,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:16 BoogieIcfgContainer [2019-11-06 22:30:16,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:16,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:16,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:16,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:16,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:14" (1/3) ... [2019-11-06 22:30:16,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558b2417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:16, skipping insertion in model container [2019-11-06 22:30:16,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:14" (2/3) ... [2019-11-06 22:30:16,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558b2417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:16, skipping insertion in model container [2019-11-06 22:30:16,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:16" (3/3) ... [2019-11-06 22:30:16,296 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label34.c [2019-11-06 22:30:16,309 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:16,318 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:16,330 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:16,370 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:16,370 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:16,371 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:16,371 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:16,371 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:16,371 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:16,372 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:16,372 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:30:16,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:16,430 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] [2019-11-06 22:30:16,432 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2059241649, now seen corresponding path program 1 times [2019-11-06 22:30:16,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:16,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362090768] [2019-11-06 22:30:16,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:16,934 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 22:30:16,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362090768] [2019-11-06 22:30:16,936 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:16,936 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:16,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721542907] [2019-11-06 22:30:16,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:16,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:16,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:16,968 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:17,823 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:17,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:17,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-06 22:30:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:17,856 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:17,857 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:17,868 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 22:30:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-11-06 22:30:17,974 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 111 [2019-11-06 22:30:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:17,975 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-11-06 22:30:17,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-11-06 22:30:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:30:17,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:17,979 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:30:17,980 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1121004690, now seen corresponding path program 1 times [2019-11-06 22:30:17,980 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:17,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754641029] [2019-11-06 22:30:17,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:18,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754641029] [2019-11-06 22:30:18,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:18,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:30:18,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096700658] [2019-11-06 22:30:18,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:30:18,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:30:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:30:18,106 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-11-06 22:30:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:18,877 INFO L93 Difference]: Finished difference Result 840 states and 1253 transitions. [2019-11-06 22:30:18,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:18,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2019-11-06 22:30:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:18,884 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:30:18,885 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:30:18,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:30:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:30:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-11-06 22:30:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 22:30:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-11-06 22:30:18,930 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 120 [2019-11-06 22:30:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:18,930 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-11-06 22:30:18,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:30:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-11-06 22:30:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:30:18,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:18,934 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-11-06 22:30:18,934 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:18,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash 476978283, now seen corresponding path program 1 times [2019-11-06 22:30:18,935 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:18,935 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544703558] [2019-11-06 22:30:18,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:19,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544703558] [2019-11-06 22:30:19,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638849240] [2019-11-06 22:30:19,038 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 22:30:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:19,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:19,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:30:19,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:30:19,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:30:19,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:30:19,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318887100] [2019-11-06 22:30:19,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:19,378 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:19,379 INFO L87 Difference]: Start difference. First operand 558 states and 788 transitions. Second operand 3 states. [2019-11-06 22:30:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:19,975 INFO L93 Difference]: Finished difference Result 1656 states and 2369 transitions. [2019-11-06 22:30:19,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:19,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-11-06 22:30:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:19,991 INFO L225 Difference]: With dead ends: 1656 [2019-11-06 22:30:19,991 INFO L226 Difference]: Without dead ends: 1104 [2019-11-06 22:30:19,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:30:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-11-06 22:30:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-11-06 22:30:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-11-06 22:30:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1541 transitions. [2019-11-06 22:30:20,040 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1541 transitions. Word has length 131 [2019-11-06 22:30:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:20,041 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1541 transitions. [2019-11-06 22:30:20,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1541 transitions. [2019-11-06 22:30:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:30:20,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:20,046 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:30:20,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:20,250 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -530260225, now seen corresponding path program 1 times [2019-11-06 22:30:20,252 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:20,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551550088] [2019-11-06 22:30:20,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:20,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551550088] [2019-11-06 22:30:20,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841720472] [2019-11-06 22:30:20,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:20,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:20,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:20,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:20,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [409349025] [2019-11-06 22:30:20,717 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 142 [2019-11-06 22:30:20,779 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:20,780 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)