/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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:30:04,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:30:04,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:30:04,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:30:04,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:30:04,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:30:04,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:30:04,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:30:04,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:30:04,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:30:04,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:30:04,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:30:04,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:30:04,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:30:04,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:30:04,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:30:04,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:30:04,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:30:04,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:30:04,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:30:04,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:30:04,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:30:04,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:30:04,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:30:04,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:30:04,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:30:04,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:30:04,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:30:04,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:30:04,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:30:04,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:30:04,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:30:04,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:30:04,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:30:04,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:30:04,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:30:04,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:30:04,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:30:04,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:30:04,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:30:04,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:30:04,575 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 22:30:04,589 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:30:04,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:30:04,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:30:04,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:30:04,591 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:30:04,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:30:04,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:30:04,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:30:04,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:30:04,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:30:04,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:30:04,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:30:04,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:30:04,593 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:30:04,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:30:04,593 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:30:04,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:30:04,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:30:04,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:30:04,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:30:04,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:30:04,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:30:04,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:30:04,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:30:04,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:30:04,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:30:04,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:30:04,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:30:04,596 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 22:30:04,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:30:04,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:30:04,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:30:04,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:30:04,893 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:30:04,894 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label32.c [2019-11-06 22:30:04,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d72e67f/8e447a81a6524df08159b7eafb1434f7/FLAG9dd80d173 [2019-11-06 22:30:05,503 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:30:05,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label32.c [2019-11-06 22:30:05,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d72e67f/8e447a81a6524df08159b7eafb1434f7/FLAG9dd80d173 [2019-11-06 22:30:05,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d72e67f/8e447a81a6524df08159b7eafb1434f7 [2019-11-06 22:30:05,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:30:05,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:30:05,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:05,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:30:05,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:30:05,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:05" (1/1) ... [2019-11-06 22:30:05,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d184af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:05, skipping insertion in model container [2019-11-06 22:30:05,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:05" (1/1) ... [2019-11-06 22:30:05,834 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:30:05,888 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:30:06,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:06,370 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:30:06,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:06,503 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:30:06,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06 WrapperNode [2019-11-06 22:30:06,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:06,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:30:06,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:30:06,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:30:06,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (1/1) ... [2019-11-06 22:30:06,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:30:06,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:30:06,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:30:06,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:30:06,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (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 22:30:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:30:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:30:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:30:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:30:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:30:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:30:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:30:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:30:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:30:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:30:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:07,843 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:07,843 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:07,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:07 BoogieIcfgContainer [2019-11-06 22:30:07,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:07,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:07,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:07,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:07,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:05" (1/3) ... [2019-11-06 22:30:07,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f680eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:07, skipping insertion in model container [2019-11-06 22:30:07,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:06" (2/3) ... [2019-11-06 22:30:07,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f680eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:07, skipping insertion in model container [2019-11-06 22:30:07,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:07" (3/3) ... [2019-11-06 22:30:07,866 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label32.c [2019-11-06 22:30:07,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:07,892 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:07,906 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:07,948 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:07,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:07,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:07,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:07,950 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:07,950 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:07,950 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:07,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:30:07,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:08,000 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] [2019-11-06 22:30:08,002 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash 312324590, now seen corresponding path program 1 times [2019-11-06 22:30:08,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:08,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782140724] [2019-11-06 22:30:08,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:08,477 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 22:30:08,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782140724] [2019-11-06 22:30:08,478 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:08,479 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:08,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377613966] [2019-11-06 22:30:08,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:08,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:08,504 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:09,377 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:09,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:09,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2019-11-06 22:30:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:09,405 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:09,406 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:09,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 22:30:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:30:09,497 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 80 [2019-11-06 22:30:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:09,499 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:30:09,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:30:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:30:09,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:09,511 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:09,511 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2042606981, now seen corresponding path program 1 times [2019-11-06 22:30:09,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:09,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859578117] [2019-11-06 22:30:09,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:09,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859578117] [2019-11-06 22:30:09,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:09,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:09,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115474024] [2019-11-06 22:30:09,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:09,660 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:09,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:09,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:09,661 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:30:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:10,433 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:30:10,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:10,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2019-11-06 22:30:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:10,442 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:30:10,442 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:30:10,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:30:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:30:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:30:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:30:10,491 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 90 [2019-11-06 22:30:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:10,491 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:30:10,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:30:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 22:30:10,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:10,494 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:30:10,494 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2007117511, now seen corresponding path program 1 times [2019-11-06 22:30:10,495 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:10,495 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903727834] [2019-11-06 22:30:10,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:10,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903727834] [2019-11-06 22:30:10,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586070561] [2019-11-06 22:30:10,656 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 22:30:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:10,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:10,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:10,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:10,972 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:30:10,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:30:10,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833139773] [2019-11-06 22:30:10,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:30:10,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:10,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:30:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:10,974 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 4 states. [2019-11-06 22:30:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:11,887 INFO L93 Difference]: Finished difference Result 1783 states and 2553 transitions. [2019-11-06 22:30:11,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:30:11,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-06 22:30:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:11,897 INFO L225 Difference]: With dead ends: 1783 [2019-11-06 22:30:11,898 INFO L226 Difference]: Without dead ends: 1233 [2019-11-06 22:30:11,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2019-11-06 22:30:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 961. [2019-11-06 22:30:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-11-06 22:30:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1195 transitions. [2019-11-06 22:30:11,970 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1195 transitions. Word has length 91 [2019-11-06 22:30:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:11,971 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1195 transitions. [2019-11-06 22:30:11,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:30:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1195 transitions. [2019-11-06 22:30:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:30:11,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:11,974 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:30:12,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:12,187 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -717933174, now seen corresponding path program 1 times [2019-11-06 22:30:12,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:12,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424745917] [2019-11-06 22:30:12,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:12,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424745917] [2019-11-06 22:30:12,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267062123] [2019-11-06 22:30:12,307 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 22:30:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:12,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:30:12,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:12,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:12,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [263311148] [2019-11-06 22:30:12,523 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 112 [2019-11-06 22:30:12,573 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:12,574 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)