/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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:19,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:19,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:19,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:47:19,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:47:19,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:47:19,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:47:19,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:47:19,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:47:19,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:47:19,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:47:19,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:47:19,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:19,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:19,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:19,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:19,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:19,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:19,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:19,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:19,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:19,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:19,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:19,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:19,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:47:19,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:47:19,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:47:19,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:47:19,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:47:19,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:47:19,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:47:19,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:47:19,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:47:19,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:47:19,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:47:19,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:47:19,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:47:19,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:47:19,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:19,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:19,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:19,874 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 22:47:19,890 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:19,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:19,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:19,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:19,892 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:19,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:19,892 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:19,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:19,894 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:19,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:19,894 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:19,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:19,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:19,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:19,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:19,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:19,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:19,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:19,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:19,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:19,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:19,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:19,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:19,896 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 22:47:20,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:20,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:20,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:20,193 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:20,193 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:20,194 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-11-06 22:47:20,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b33e7342/f008e7c7aa2e4bb49335e566a4958d0f/FLAG9b7fa94ab [2019-11-06 22:47:20,831 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:20,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label38.c [2019-11-06 22:47:20,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b33e7342/f008e7c7aa2e4bb49335e566a4958d0f/FLAG9b7fa94ab [2019-11-06 22:47:21,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b33e7342/f008e7c7aa2e4bb49335e566a4958d0f [2019-11-06 22:47:21,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:21,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:21,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:21,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:21,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:21,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:21" (1/1) ... [2019-11-06 22:47:21,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8cd29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:21, skipping insertion in model container [2019-11-06 22:47:21,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:21" (1/1) ... [2019-11-06 22:47:21,108 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:21,168 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:21,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:21,783 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:22,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:22,066 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:22,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22 WrapperNode [2019-11-06 22:47:22,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:22,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:22,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:22,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:22,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (1/1) ... [2019-11-06 22:47:22,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:22,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:22,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:22,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:22,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (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 22:47:22,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:22,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:22,366 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:22,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:24,183 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:24,184 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:24,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:24 BoogieIcfgContainer [2019-11-06 22:47:24,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:24,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:24,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:24,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:24,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:21" (1/3) ... [2019-11-06 22:47:24,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4337d809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:24, skipping insertion in model container [2019-11-06 22:47:24,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:22" (2/3) ... [2019-11-06 22:47:24,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4337d809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:24, skipping insertion in model container [2019-11-06 22:47:24,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:24" (3/3) ... [2019-11-06 22:47:24,201 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label38.c [2019-11-06 22:47:24,214 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:24,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:24,237 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:24,282 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:24,282 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:24,283 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:24,283 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:24,283 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:24,283 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:24,283 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:24,284 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:47:24,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:24,332 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] [2019-11-06 22:47:24,336 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1782601651, now seen corresponding path program 1 times [2019-11-06 22:47:24,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:24,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532158937] [2019-11-06 22:47:24,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:24,725 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 22:47:24,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532158937] [2019-11-06 22:47:24,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:24,727 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:24,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413768781] [2019-11-06 22:47:24,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:24,736 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:24,754 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:47:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:26,144 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-11-06 22:47:26,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:26,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2019-11-06 22:47:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:26,180 INFO L225 Difference]: With dead ends: 779 [2019-11-06 22:47:26,180 INFO L226 Difference]: Without dead ends: 425 [2019-11-06 22:47:26,195 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 22:47:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-06 22:47:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-11-06 22:47:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:47:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-11-06 22:47:26,306 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 66 [2019-11-06 22:47:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:26,307 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-11-06 22:47:26,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-11-06 22:47:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:47:26,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:26,320 INFO L410 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, 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] [2019-11-06 22:47:26,321 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:26,322 INFO L82 PathProgramCache]: Analyzing trace with hash -271473866, now seen corresponding path program 1 times [2019-11-06 22:47:26,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:26,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573664076] [2019-11-06 22:47:26,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:26,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573664076] [2019-11-06 22:47:26,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:26,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:26,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132807514] [2019-11-06 22:47:26,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:26,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:26,628 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-11-06 22:47:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:29,389 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-11-06 22:47:29,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:47:29,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-11-06 22:47:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:29,400 INFO L225 Difference]: With dead ends: 1665 [2019-11-06 22:47:29,400 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 22:47:29,403 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 22:47:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 22:47:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-11-06 22:47:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-11-06 22:47:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-11-06 22:47:29,478 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 136 [2019-11-06 22:47:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:29,479 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-11-06 22:47:29,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-11-06 22:47:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 22:47:29,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:29,482 INFO L410 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, 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] [2019-11-06 22:47:29,483 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1985877122, now seen corresponding path program 1 times [2019-11-06 22:47:29,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:29,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508707979] [2019-11-06 22:47:29,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:29,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508707979] [2019-11-06 22:47:29,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:29,661 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:29,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006739636] [2019-11-06 22:47:29,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:29,662 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:29,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:29,663 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:47:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:31,438 INFO L93 Difference]: Finished difference Result 3448 states and 5147 transitions. [2019-11-06 22:47:31,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:31,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-11-06 22:47:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:31,455 INFO L225 Difference]: With dead ends: 3448 [2019-11-06 22:47:31,456 INFO L226 Difference]: Without dead ends: 2237 [2019-11-06 22:47:31,466 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 22:47:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-11-06 22:47:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2212. [2019-11-06 22:47:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-11-06 22:47:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3011 transitions. [2019-11-06 22:47:31,557 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3011 transitions. Word has length 146 [2019-11-06 22:47:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:31,566 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3011 transitions. [2019-11-06 22:47:31,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3011 transitions. [2019-11-06 22:47:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-06 22:47:31,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:31,576 INFO L410 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:31,576 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1482166744, now seen corresponding path program 1 times [2019-11-06 22:47:31,577 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:31,577 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045810274] [2019-11-06 22:47:31,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:31,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045810274] [2019-11-06 22:47:31,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582625203] [2019-11-06 22:47:31,853 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 22:47:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:31,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:47:31,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:32,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:32,197 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [427233746] [2019-11-06 22:47:32,203 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 210 [2019-11-06 22:47:32,248 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:32,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:47:56,479 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:47:56,481 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 22:47:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:56,484 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates