java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:19,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:19,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:19,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:19,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:19,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:19,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:19,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:19,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:19,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:19,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:19,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:19,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:19,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:19,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:19,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:19,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:19,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:19,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:19,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:19,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:19,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:19,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:19,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:19,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:04:19,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:19,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:19,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:19,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:19,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:19,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:19,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:19,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:19,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:19,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:19,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:19,367 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 [2019-10-13 20:04:19,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:19,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:19,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:19,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:19,384 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:19,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:19,384 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:19,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:19,385 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:19,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:19,388 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:19,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:19,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:19,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:19,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:19,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:19,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:19,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:19,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:19,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:19,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:19,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:19,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:19,391 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 [2019-10-13 20:04:19,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:19,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:19,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:19,672 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:19,673 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:19,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-13 20:04:19,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a2f053aa/6e10a5008c07481886550b203e57aebd/FLAG6463a2110 [2019-10-13 20:04:20,388 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:20,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-13 20:04:20,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a2f053aa/6e10a5008c07481886550b203e57aebd/FLAG6463a2110 [2019-10-13 20:04:20,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a2f053aa/6e10a5008c07481886550b203e57aebd [2019-10-13 20:04:20,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:20,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:20,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:20,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:20,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:20,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:20" (1/1) ... [2019-10-13 20:04:20,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22642b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:20, skipping insertion in model container [2019-10-13 20:04:20,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:20" (1/1) ... [2019-10-13 20:04:20,584 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:20,641 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:21,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:21,311 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:21,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:21,576 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:21,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21 WrapperNode [2019-10-13 20:04:21,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:21,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:21,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:21,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:21,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (1/1) ... [2019-10-13 20:04:21,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:21,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:21,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:21,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:21,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (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 [2019-10-13 20:04:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:23,919 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:23,921 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:23,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:23 BoogieIcfgContainer [2019-10-13 20:04:23,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:23,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:23,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:23,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:23,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:20" (1/3) ... [2019-10-13 20:04:23,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a7333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:23, skipping insertion in model container [2019-10-13 20:04:23,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:21" (2/3) ... [2019-10-13 20:04:23,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a7333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:23, skipping insertion in model container [2019-10-13 20:04:23,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:23" (3/3) ... [2019-10-13 20:04:23,944 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2019-10-13 20:04:23,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:23,971 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:23,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:24,027 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:24,028 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:24,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:24,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:24,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:24,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:24,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:24,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 20:04:24,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:24,081 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] [2019-10-13 20:04:24,084 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times [2019-10-13 20:04:24,101 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:24,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496524024] [2019-10-13 20:04:24,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:24,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:24,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:24,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496524024] [2019-10-13 20:04:24,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:24,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:24,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708726779] [2019-10-13 20:04:24,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:24,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:24,604 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:04:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:25,933 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-13 20:04:25,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:25,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-13 20:04:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:25,952 INFO L225 Difference]: With dead ends: 779 [2019-10-13 20:04:25,952 INFO L226 Difference]: Without dead ends: 425 [2019-10-13 20:04:25,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-13 20:04:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-13 20:04:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:04:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-10-13 20:04:26,044 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 71 [2019-10-13 20:04:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:26,045 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-10-13 20:04:26,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-10-13 20:04:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:04:26,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:26,054 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, 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] [2019-10-13 20:04:26,055 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times [2019-10-13 20:04:26,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:26,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856666001] [2019-10-13 20:04:26,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:26,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:26,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856666001] [2019-10-13 20:04:26,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:26,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:26,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258196184] [2019-10-13 20:04:26,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:26,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:26,269 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-10-13 20:04:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:28,834 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-10-13 20:04:28,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:04:28,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 20:04:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:28,856 INFO L225 Difference]: With dead ends: 1665 [2019-10-13 20:04:28,856 INFO L226 Difference]: Without dead ends: 1251 [2019-10-13 20:04:28,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:04:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-13 20:04:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-10-13 20:04:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-10-13 20:04:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-10-13 20:04:28,975 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 141 [2019-10-13 20:04:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:28,978 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-10-13 20:04:28,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-10-13 20:04:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 20:04:28,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:28,989 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, 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] [2019-10-13 20:04:28,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:28,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times [2019-10-13 20:04:28,990 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:28,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586571311] [2019-10-13 20:04:28,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:28,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:28,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:29,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586571311] [2019-10-13 20:04:29,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:29,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:29,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619603930] [2019-10-13 20:04:29,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:29,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:29,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:29,291 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-10-13 20:04:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:31,033 INFO L93 Difference]: Finished difference Result 3450 states and 5148 transitions. [2019-10-13 20:04:31,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:31,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-10-13 20:04:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:31,049 INFO L225 Difference]: With dead ends: 3450 [2019-10-13 20:04:31,050 INFO L226 Difference]: Without dead ends: 2239 [2019-10-13 20:04:31,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:04:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2019-10-13 20:04:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2212. [2019-10-13 20:04:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-13 20:04:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-10-13 20:04:31,152 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 151 [2019-10-13 20:04:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:31,154 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-10-13 20:04:31,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-10-13 20:04:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 20:04:31,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:31,161 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:31,161 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times [2019-10-13 20:04:31,162 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:31,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382389766] [2019-10-13 20:04:31,162 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:31,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:31,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:31,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382389766] [2019-10-13 20:04:31,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534159499] [2019-10-13 20:04:31,424 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 [2019-10-13 20:04:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:31,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:04:31,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:31,647 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:31,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [745219307] [2019-10-13 20:04:31,783 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 215 [2019-10-13 20:04:31,844 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:31,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:04:56,055 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:04:56,057 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-13 20:04:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:56,061 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates