java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:53,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:53,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:53,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:53,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:53,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:53,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:53,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:53,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:53,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:53,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:53,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:53,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:53,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:53,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:53,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:53,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:53,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:53,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:53,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:53,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:53,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:53,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:53,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:53,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:53,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:05:53,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:05:53,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:05:53,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:05:53,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:05:53,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:05:53,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:05:53,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:05:53,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:53,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:53,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:53,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:05:53,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:53,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:53,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:53,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:53,734 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:53,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:53,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:53,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:53,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:53,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:53,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:53,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:53,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:53,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:53,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:53,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:53,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:53,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:53,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:53,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:53,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:53,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:53,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:53,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:53,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:53,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:53,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:53,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:53,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:05:54,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:54,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:54,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:54,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:54,045 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:54,046 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2019-10-15 00:05:54,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ba7aa16/f06768532ea74f0caf2f1fb66fc7f13b/FLAG1a7947d5e [2019-10-15 00:05:54,722 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:54,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21.c [2019-10-15 00:05:54,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ba7aa16/f06768532ea74f0caf2f1fb66fc7f13b/FLAG1a7947d5e [2019-10-15 00:05:54,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1ba7aa16/f06768532ea74f0caf2f1fb66fc7f13b [2019-10-15 00:05:55,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:55,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:55,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:55,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:55,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:55,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:54" (1/1) ... [2019-10-15 00:05:55,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3a515f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55, skipping insertion in model container [2019-10-15 00:05:55,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:54" (1/1) ... [2019-10-15 00:05:55,023 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:55,100 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:55,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:55,672 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:55,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:55,816 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:55,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55 WrapperNode [2019-10-15 00:05:55,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:55,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:55,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:55,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:55,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... [2019-10-15 00:05:55,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:55,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:55,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:55,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:55,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:56,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:56,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:56,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:56,047 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:56,048 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:57,533 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:57,533 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:57,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:57 BoogieIcfgContainer [2019-10-15 00:05:57,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:57,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:57,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:57,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:57,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:54" (1/3) ... [2019-10-15 00:05:57,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f88d2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:57, skipping insertion in model container [2019-10-15 00:05:57,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:55" (2/3) ... [2019-10-15 00:05:57,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f88d2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:57, skipping insertion in model container [2019-10-15 00:05:57,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:57" (3/3) ... [2019-10-15 00:05:57,544 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label21.c [2019-10-15 00:05:57,557 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:57,571 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:57,583 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:57,625 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:57,626 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:57,626 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:57,626 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:57,626 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:57,626 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:57,627 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:57,627 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:05:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 00:05:57,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:57,671 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] [2019-10-15 00:05:57,673 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:57,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:57,682 INFO L82 PathProgramCache]: Analyzing trace with hash -736368013, now seen corresponding path program 1 times [2019-10-15 00:05:57,692 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:57,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649755081] [2019-10-15 00:05:57,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:57,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:57,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:58,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649755081] [2019-10-15 00:05:58,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:58,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:58,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693046147] [2019-10-15 00:05:58,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:58,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:58,040 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:05:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:59,305 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:05:59,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:59,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-15 00:05:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:59,325 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:05:59,326 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:05:59,334 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 [2019-10-15 00:05:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:05:59,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:05:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:05:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions. [2019-10-15 00:05:59,418 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 40 [2019-10-15 00:05:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:59,420 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 596 transitions. [2019-10-15 00:05:59,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions. [2019-10-15 00:05:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:05:59,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:59,432 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:05:59,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:59,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1744454378, now seen corresponding path program 1 times [2019-10-15 00:05:59,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:59,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106626602] [2019-10-15 00:05:59,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:59,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:59,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:59,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106626602] [2019-10-15 00:05:59,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:59,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:59,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746379866] [2019-10-15 00:05:59,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:59,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:59,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:59,652 INFO L87 Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states. [2019-10-15 00:06:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:01,102 INFO L93 Difference]: Finished difference Result 940 states and 1514 transitions. [2019-10-15 00:06:01,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:06:01,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-10-15 00:06:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:01,108 INFO L225 Difference]: With dead ends: 940 [2019-10-15 00:06:01,108 INFO L226 Difference]: Without dead ends: 574 [2019-10-15 00:06:01,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:06:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-10-15 00:06:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2019-10-15 00:06:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-15 00:06:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions. [2019-10-15 00:06:01,179 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 116 [2019-10-15 00:06:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:01,180 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 831 transitions. [2019-10-15 00:06:01,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:06:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions. [2019-10-15 00:06:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 00:06:01,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:01,185 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2019-10-15 00:06:01,185 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:01,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1787764330, now seen corresponding path program 1 times [2019-10-15 00:06:01,186 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:01,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473303234] [2019-10-15 00:06:01,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:01,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:01,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:01,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473303234] [2019-10-15 00:06:01,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:01,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:01,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689356720] [2019-10-15 00:06:01,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:01,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:01,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:01,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:01,482 INFO L87 Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states. [2019-10-15 00:06:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:02,901 INFO L93 Difference]: Finished difference Result 1526 states and 2378 transitions. [2019-10-15 00:06:02,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:02,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2019-10-15 00:06:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:02,916 INFO L225 Difference]: With dead ends: 1526 [2019-10-15 00:06:02,917 INFO L226 Difference]: Without dead ends: 968 [2019-10-15 00:06:02,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:06:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-10-15 00:06:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942. [2019-10-15 00:06:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-15 00:06:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions. [2019-10-15 00:06:02,998 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 180 [2019-10-15 00:06:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:02,999 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions. [2019-10-15 00:06:03,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions. [2019-10-15 00:06:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 00:06:03,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:03,010 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:06:03,010 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash 122382904, now seen corresponding path program 1 times [2019-10-15 00:06:03,011 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:03,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026932411] [2019-10-15 00:06:03,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:03,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:03,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:03,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026932411] [2019-10-15 00:06:03,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024787205] [2019-10-15 00:06:03,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:06:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:03,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:06:03,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:03,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:03,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1344289211] [2019-10-15 00:06:03,702 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 200 [2019-10-15 00:06:03,754 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:03,754 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:09,053 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:09,056 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:06:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:09,061 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:12,558 INFO L227 lantSequenceWeakener]: Weakened 180 states. On average, predicates are now at 77.99% of their original sizes. [2019-10-15 00:06:12,558 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:12,642 INFO L553 sIntCurrentIteration]: We unified 198 AI predicates to 198 [2019-10-15 00:06:12,643 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:12,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:12,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-15 00:06:12,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156672862] [2019-10-15 00:06:12,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 00:06:12,646 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:12,646 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 00:06:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:06:12,647 INFO L87 Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states.