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/Problem02_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:22,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:22,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:22,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:22,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:22,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:22,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:22,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:22,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:22,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:22,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:22,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:22,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:22,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:22,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:22,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:22,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:22,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:22,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:22,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:22,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:22,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:22,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:22,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:22,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:22,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:22,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:22,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:22,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:22,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:22,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:22,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:22,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:22,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:22,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:22,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:22,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:55:22,741 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:22,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:22,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:22,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:22,742 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:22,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:22,743 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:22,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:22,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:22,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:22,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:22,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:22,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:22,747 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:22,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:22,747 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:22,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:22,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:22,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:22,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:22,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:22,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:22,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:22,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:22,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:22,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:22,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:22,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:22,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:55:23,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:23,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:23,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:23,032 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:23,032 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:23,033 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2019-10-14 23:55:23,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92dcb9d61/504b52e1acde4a76aa5f1843effbd3fd/FLAGf36ac6bd2 [2019-10-14 23:55:23,634 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:23,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2019-10-14 23:55:23,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92dcb9d61/504b52e1acde4a76aa5f1843effbd3fd/FLAGf36ac6bd2 [2019-10-14 23:55:23,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92dcb9d61/504b52e1acde4a76aa5f1843effbd3fd [2019-10-14 23:55:23,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:23,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:23,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:23,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:23,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:23,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2b11d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23, skipping insertion in model container [2019-10-14 23:55:23,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,958 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:24,012 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:24,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:24,560 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:24,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:24,691 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:24,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24 WrapperNode [2019-10-14 23:55:24,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:24,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:24,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:24,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:24,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... [2019-10-14 23:55:24,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:24,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:24,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:24,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:24,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:24,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:24,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:26,057 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:26,057 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:26,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:26 BoogieIcfgContainer [2019-10-14 23:55:26,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:26,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:26,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:26,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:26,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:23" (1/3) ... [2019-10-14 23:55:26,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1c426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:26, skipping insertion in model container [2019-10-14 23:55:26,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:24" (2/3) ... [2019-10-14 23:55:26,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1c426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:26, skipping insertion in model container [2019-10-14 23:55:26,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:26" (3/3) ... [2019-10-14 23:55:26,067 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2019-10-14 23:55:26,077 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:26,085 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:26,096 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:26,123 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:26,123 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:26,123 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:26,123 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:26,125 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:26,125 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:26,126 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:26,126 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:55:26,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:26,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:26,183 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1511676745, now seen corresponding path program 1 times [2019-10-14 23:55:26,199 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:26,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936800427] [2019-10-14 23:55:26,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:26,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:26,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:26,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936800427] [2019-10-14 23:55:26,627 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:26,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:26,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611690572] [2019-10-14 23:55:26,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:26,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:26,651 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:27,600 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-10-14 23:55:27,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:27,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-14 23:55:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:27,619 INFO L225 Difference]: With dead ends: 623 [2019-10-14 23:55:27,619 INFO L226 Difference]: Without dead ends: 325 [2019-10-14 23:55:27,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-10-14 23:55:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-10-14 23:55:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:55:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-10-14 23:55:27,729 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 119 [2019-10-14 23:55:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:27,731 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-10-14 23:55:27,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-10-14 23:55:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 23:55:27,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:27,748 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:27,749 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1590718300, now seen corresponding path program 1 times [2019-10-14 23:55:27,750 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:27,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947271495] [2019-10-14 23:55:27,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:27,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:27,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:27,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947271495] [2019-10-14 23:55:27,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:27,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:27,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367095731] [2019-10-14 23:55:27,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:27,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:27,947 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-10-14 23:55:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:28,735 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-10-14 23:55:28,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:28,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-14 23:55:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:28,742 INFO L225 Difference]: With dead ends: 955 [2019-10-14 23:55:28,742 INFO L226 Difference]: Without dead ends: 640 [2019-10-14 23:55:28,744 INFO L600 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 [2019-10-14 23:55:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-10-14 23:55:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-10-14 23:55:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-14 23:55:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 902 transitions. [2019-10-14 23:55:28,794 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 902 transitions. Word has length 139 [2019-10-14 23:55:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:28,794 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 902 transitions. [2019-10-14 23:55:28,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 902 transitions. [2019-10-14 23:55:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:55:28,798 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:28,798 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:28,798 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 255104169, now seen corresponding path program 1 times [2019-10-14 23:55:28,799 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:28,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166269820] [2019-10-14 23:55:28,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:28,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:28,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:28,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166269820] [2019-10-14 23:55:28,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041902122] [2019-10-14 23:55:28,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:55:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:29,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:29,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:29,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:29,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1097335819] [2019-10-14 23:55:29,329 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 148 [2019-10-14 23:55:29,395 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:29,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)