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_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:46,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:46,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:46,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:46,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:46,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:46,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:46,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:46,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:46,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:46,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:46,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:46,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:46,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:46,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:46,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:46,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:46,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:46,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:46,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:46,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:46,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:46,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:46,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:46,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:46,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:46,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:46,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:46,627 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 23:56:46,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:46,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:46,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:46,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:46,664 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:46,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:46,665 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:46,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:46,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:46,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:46,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:46,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:46,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:46,666 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:46,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:46,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:46,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:46,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:46,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:46,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:46,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:46,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:46,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:46,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:46,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:46,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:46,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:46,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:46,669 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 23:56:46,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:46,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:46,972 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:46,974 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:46,974 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:46,975 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2019-10-14 23:56:47,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b2b2701/6cb243dcff5c4c26accd7c43bc7e09b6/FLAGa6904f548 [2019-10-14 23:56:47,605 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:47,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2019-10-14 23:56:47,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b2b2701/6cb243dcff5c4c26accd7c43bc7e09b6/FLAGa6904f548 [2019-10-14 23:56:47,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b2b2701/6cb243dcff5c4c26accd7c43bc7e09b6 [2019-10-14 23:56:47,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:47,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:47,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:47,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:47,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:47,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:47" (1/1) ... [2019-10-14 23:56:47,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da3fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:47, skipping insertion in model container [2019-10-14 23:56:47,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:47" (1/1) ... [2019-10-14 23:56:47,906 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:47,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:48,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:48,596 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:48,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:48,740 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:48,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48 WrapperNode [2019-10-14 23:56:48,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:48,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:48,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:48,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:48,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (1/1) ... [2019-10-14 23:56:48,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:48,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:48,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:48,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:48,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (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 23:56:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:48,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:48,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:50,121 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:50,121 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:50,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:50 BoogieIcfgContainer [2019-10-14 23:56:50,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:50,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:50,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:50,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:50,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:47" (1/3) ... [2019-10-14 23:56:50,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ace750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:50, skipping insertion in model container [2019-10-14 23:56:50,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:48" (2/3) ... [2019-10-14 23:56:50,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ace750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:50, skipping insertion in model container [2019-10-14 23:56:50,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:50" (3/3) ... [2019-10-14 23:56:50,135 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2019-10-14 23:56:50,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:50,154 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:50,165 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:50,194 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:50,194 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:50,194 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:50,195 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:50,195 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:50,195 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:50,195 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:50,195 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 23:56:50,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:50,235 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] [2019-10-14 23:56:50,236 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2002898937, now seen corresponding path program 1 times [2019-10-14 23:56:50,253 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:50,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843600883] [2019-10-14 23:56:50,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:50,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:50,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:50,782 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 23:56:50,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843600883] [2019-10-14 23:56:50,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:50,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:50,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341024196] [2019-10-14 23:56:50,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:50,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:50,820 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:51,891 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-10-14 23:56:51,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:51,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-14 23:56:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:51,921 INFO L225 Difference]: With dead ends: 623 [2019-10-14 23:56:51,921 INFO L226 Difference]: Without dead ends: 325 [2019-10-14 23:56:51,933 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 23:56:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-10-14 23:56:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-10-14 23:56:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:56:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-10-14 23:56:52,042 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 115 [2019-10-14 23:56:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:52,044 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-10-14 23:56:52,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-10-14 23:56:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:56:52,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:52,057 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] [2019-10-14 23:56:52,058 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 906357460, now seen corresponding path program 1 times [2019-10-14 23:56:52,060 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:52,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738339563] [2019-10-14 23:56:52,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:52,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:52,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:52,253 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 23:56:52,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738339563] [2019-10-14 23:56:52,254 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:52,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:52,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658903996] [2019-10-14 23:56:52,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:52,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:52,257 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-10-14 23:56:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:53,035 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-10-14 23:56:53,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:53,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-14 23:56:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:53,042 INFO L225 Difference]: With dead ends: 955 [2019-10-14 23:56:53,042 INFO L226 Difference]: Without dead ends: 640 [2019-10-14 23:56:53,044 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 23:56:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-10-14 23:56:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-10-14 23:56:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-14 23:56:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 903 transitions. [2019-10-14 23:56:53,096 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 903 transitions. Word has length 135 [2019-10-14 23:56:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:53,097 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 903 transitions. [2019-10-14 23:56:53,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 903 transitions. [2019-10-14 23:56:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:56:53,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:53,100 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:56:53,101 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1019013890, now seen corresponding path program 1 times [2019-10-14 23:56:53,102 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:53,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333108194] [2019-10-14 23:56:53,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:53,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:53,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:56:53,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333108194] [2019-10-14 23:56:53,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439816517] [2019-10-14 23:56:53,248 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 23:56:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:53,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:53,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:53,507 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:53,573 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:56:53,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-14 23:56:53,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213141907] [2019-10-14 23:56:53,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:53,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:53,576 INFO L87 Difference]: Start difference. First operand 623 states and 903 transitions. Second operand 3 states. [2019-10-14 23:56:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:54,169 INFO L93 Difference]: Finished difference Result 1676 states and 2455 transitions. [2019-10-14 23:56:54,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:54,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2019-10-14 23:56:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:54,177 INFO L225 Difference]: With dead ends: 1676 [2019-10-14 23:56:54,178 INFO L226 Difference]: Without dead ends: 1059 [2019-10-14 23:56:54,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-10-14 23:56:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 767. [2019-10-14 23:56:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2019-10-14 23:56:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1111 transitions. [2019-10-14 23:56:54,207 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1111 transitions. Word has length 136 [2019-10-14 23:56:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:54,208 INFO L462 AbstractCegarLoop]: Abstraction has 767 states and 1111 transitions. [2019-10-14 23:56:54,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1111 transitions. [2019-10-14 23:56:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 23:56:54,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:54,212 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:54,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:54,421 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 70547790, now seen corresponding path program 1 times [2019-10-14 23:56:54,423 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:54,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641402519] [2019-10-14 23:56:54,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:54,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:54,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:56:54,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641402519] [2019-10-14 23:56:54,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549827388] [2019-10-14 23:56:54,592 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 [2019-10-14 23:56:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:54,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:54,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:54,838 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:54,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [20368207] [2019-10-14 23:56:54,952 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 179 [2019-10-14 23:56:55,016 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:55,017 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)