/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:02:56,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:02:56,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:02:56,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:02:56,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:02:56,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:02:56,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:02:56,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:02:56,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:02:56,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:02:56,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:02:56,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:02:56,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:02:56,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:02:56,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:02:56,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:02:56,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:02:56,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:02:56,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:02:56,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:02:56,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:02:56,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:02:56,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:02:56,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:02:56,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:02:56,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:02:56,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:02:56,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:02:56,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:02:56,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:02:56,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:02:56,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:02:56,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:02:56,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:02:56,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:02:56,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:02:56,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:02:56,117 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:02:56,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:02:56,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:02:56,119 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:02:56,119 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:02:56,119 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:02:56,119 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:02:56,119 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:02:56,120 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:02:56,120 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:02:56,120 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:02:56,120 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:02:56,120 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:02:56,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:02:56,122 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:02:56,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:02:56,123 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:02:56,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:02:56,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:02:56,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:02:56,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:02:56,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:02:56,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:02:56,125 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:02:56,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:02:56,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:02:56,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:02:56,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:02:56,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:02:56,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:02:56,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:02:56,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:02:56,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:02:56,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:02:56,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:02:56,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:02:56,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:02:56,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:02:56,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:02:56,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:02:56,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:02:56,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:02:56,470 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:02:56,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2019-11-24 04:02:56,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b075a3c0e/b9fce049ddae4efeb14e677b12577413/FLAG2e13a03b8 [2019-11-24 04:02:56,983 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:02:56,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2019-11-24 04:02:57,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b075a3c0e/b9fce049ddae4efeb14e677b12577413/FLAG2e13a03b8 [2019-11-24 04:02:57,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b075a3c0e/b9fce049ddae4efeb14e677b12577413 [2019-11-24 04:02:57,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:02:57,307 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:02:57,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:02:57,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:02:57,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:02:57,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:57,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f85085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57, skipping insertion in model container [2019-11-24 04:02:57,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:57,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:02:57,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:02:57,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:02:57,883 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:02:57,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:02:57,987 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:02:57,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57 WrapperNode [2019-11-24 04:02:57,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:02:57,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:02:57,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:02:57,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:02:57,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:02:58,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:02:58,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:02:58,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:02:58,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... [2019-11-24 04:02:58,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:02:58,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:02:58,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:02:58,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:02:58,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:02:58,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:02:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:02:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:02:59,345 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:02:59,346 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-24 04:02:59,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:02:59 BoogieIcfgContainer [2019-11-24 04:02:59,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:02:59,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:02:59,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:02:59,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:02:59,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:02:57" (1/3) ... [2019-11-24 04:02:59,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc28da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:02:59, skipping insertion in model container [2019-11-24 04:02:59,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:02:57" (2/3) ... [2019-11-24 04:02:59,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc28da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:02:59, skipping insertion in model container [2019-11-24 04:02:59,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:02:59" (3/3) ... [2019-11-24 04:02:59,357 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2019-11-24 04:02:59,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:02:59,378 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:02:59,392 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:02:59,423 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:02:59,424 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:02:59,424 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:02:59,424 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:02:59,425 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:02:59,425 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:02:59,426 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:02:59,426 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:02:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-24 04:02:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:02:59,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:02:59,452 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:02:59,452 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:02:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:02:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2079557203, now seen corresponding path program 1 times [2019-11-24 04:02:59,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:02:59,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445207050] [2019-11-24 04:02:59,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:02:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:02:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:02:59,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445207050] [2019-11-24 04:02:59,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:02:59,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:02:59,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601075597] [2019-11-24 04:02:59,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:02:59,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:02:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:02:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:02:59,671 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-24 04:02:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:02:59,691 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2019-11-24 04:02:59,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:02:59,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-11-24 04:02:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:02:59,702 INFO L225 Difference]: With dead ends: 63 [2019-11-24 04:02:59,702 INFO L226 Difference]: Without dead ends: 27 [2019-11-24 04:02:59,705 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:02:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-24 04:02:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-24 04:02:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-24 04:02:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-11-24 04:02:59,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 13 [2019-11-24 04:02:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:02:59,738 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-11-24 04:02:59,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:02:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-11-24 04:02:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:02:59,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:02:59,740 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:02:59,740 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:02:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:02:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1860167109, now seen corresponding path program 1 times [2019-11-24 04:02:59,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:02:59,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367660700] [2019-11-24 04:02:59,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:02:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:02:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:02:59,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367660700] [2019-11-24 04:02:59,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:02:59,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:02:59,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357173873] [2019-11-24 04:02:59,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:02:59,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:02:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:02:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:02:59,827 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2019-11-24 04:02:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:02:59,864 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2019-11-24 04:02:59,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:02:59,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-24 04:02:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:02:59,867 INFO L225 Difference]: With dead ends: 47 [2019-11-24 04:02:59,867 INFO L226 Difference]: Without dead ends: 31 [2019-11-24 04:02:59,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:02:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-24 04:02:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-24 04:02:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-24 04:02:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-24 04:02:59,877 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2019-11-24 04:02:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:02:59,878 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-24 04:02:59,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:02:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-24 04:02:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 04:02:59,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:02:59,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:02:59,880 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:02:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:02:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2056967314, now seen corresponding path program 1 times [2019-11-24 04:02:59,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:02:59,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706630151] [2019-11-24 04:02:59,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:02:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:00,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706630151] [2019-11-24 04:03:00,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:00,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:03:00,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344852328] [2019-11-24 04:03:00,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:03:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:03:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:03:00,037 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2019-11-24 04:03:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:00,231 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-11-24 04:03:00,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:03:00,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-24 04:03:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:00,237 INFO L225 Difference]: With dead ends: 51 [2019-11-24 04:03:00,237 INFO L226 Difference]: Without dead ends: 47 [2019-11-24 04:03:00,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:03:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-24 04:03:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2019-11-24 04:03:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 04:03:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2019-11-24 04:03:00,252 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 22 [2019-11-24 04:03:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:00,253 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2019-11-24 04:03:00,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:03:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2019-11-24 04:03:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:03:00,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:00,256 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:00,257 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1011952599, now seen corresponding path program 1 times [2019-11-24 04:03:00,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:00,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183242778] [2019-11-24 04:03:00,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:00,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183242778] [2019-11-24 04:03:00,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:00,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:03:00,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618047459] [2019-11-24 04:03:00,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:03:00,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:03:00,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:03:00,392 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 5 states. [2019-11-24 04:03:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:00,580 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-24 04:03:00,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:03:00,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-24 04:03:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:00,582 INFO L225 Difference]: With dead ends: 53 [2019-11-24 04:03:00,582 INFO L226 Difference]: Without dead ends: 45 [2019-11-24 04:03:00,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:03:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-24 04:03:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2019-11-24 04:03:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-24 04:03:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-24 04:03:00,588 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 24 [2019-11-24 04:03:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:00,588 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-24 04:03:00,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:03:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-24 04:03:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:03:00,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:00,590 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:00,590 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash 12750377, now seen corresponding path program 1 times [2019-11-24 04:03:00,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:00,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454758740] [2019-11-24 04:03:00,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:00,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454758740] [2019-11-24 04:03:00,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:03:00,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:03:00,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814589154] [2019-11-24 04:03:00,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:03:00,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:03:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:03:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:03:00,669 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2019-11-24 04:03:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:03:00,937 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-24 04:03:00,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:03:00,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-24 04:03:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:03:00,938 INFO L225 Difference]: With dead ends: 53 [2019-11-24 04:03:00,938 INFO L226 Difference]: Without dead ends: 42 [2019-11-24 04:03:00,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:03:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-24 04:03:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2019-11-24 04:03:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-24 04:03:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-24 04:03:00,943 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 24 [2019-11-24 04:03:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:03:00,944 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-24 04:03:00,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:03:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-24 04:03:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 04:03:00,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:03:00,945 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:03:00,945 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:03:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:03:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2004396535, now seen corresponding path program 1 times [2019-11-24 04:03:00,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:03:00,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467765811] [2019-11-24 04:03:00,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:03:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:01,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467765811] [2019-11-24 04:03:01,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272610438] [2019-11-24 04:03:01,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:03:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:03:01,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-24 04:03:01,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:03:01,240 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-24 04:03:01,241 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,251 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,253 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,254 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-24 04:03:01,292 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,292 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-24 04:03:01,293 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,305 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,310 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 04:03:01,311 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,352 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,353 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,353 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:18 [2019-11-24 04:03:01,386 INFO L343 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2019-11-24 04:03:01,387 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2019-11-24 04:03:01,387 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,395 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,396 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,396 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2019-11-24 04:03:01,422 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-24 04:03:01,423 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,438 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,439 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-24 04:03:01,440 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2019-11-24 04:03:01,479 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-24 04:03:01,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,484 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,484 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,485 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2019-11-24 04:03:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:01,488 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:03:01,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:01,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,536 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 04:03:01,543 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:03:01,544 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-24 04:03:01,544 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:54, output treesize:22 [2019-11-24 04:03:01,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:01,587 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 162 [2019-11-24 04:03:01,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 04:03:01,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:01,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:01,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:03:01,593 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:03:01,727 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2019-11-24 04:03:01,728 INFO L567 ElimStorePlain]: treesize reduction 171, result has 16.2 percent of original size [2019-11-24 04:03:01,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-24 04:03:01,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2019-11-24 04:03:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:03:01,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217664791] [2019-11-24 04:03:01,932 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-11-24 04:03:01,932 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:03:01,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:03:01,944 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:03:01,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:03:02,331 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:02,451 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:02,492 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:02,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:02,604 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:03,036 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:03,182 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:03,195 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:03,919 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 325 [2019-11-24 04:03:04,032 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:04,188 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:07,156 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:07,498 WARN L192 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 323 [2019-11-24 04:03:07,738 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 323 [2019-11-24 04:03:07,853 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:07,970 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 04:03:07,991 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:08,197 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:08,300 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2019-11-24 04:03:08,587 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:08,612 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:08,734 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:08,839 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-11-24 04:03:08,986 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-24 04:03:09,108 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:09,125 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:10,215 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2019-11-24 04:03:10,695 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 635 [2019-11-24 04:03:10,739 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:10,977 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:14,916 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 586 [2019-11-24 04:03:16,001 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 587 [2019-11-24 04:03:19,540 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 569 [2019-11-24 04:03:26,739 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-11-24 04:03:26,921 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 365 [2019-11-24 04:03:27,327 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-24 04:03:27,517 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-24 04:03:27,794 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-24 04:03:27,979 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2019-11-24 04:03:30,509 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 669 [2019-11-24 04:03:30,538 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:30,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:48,042 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 521 [2019-11-24 04:03:50,817 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-11-24 04:03:51,276 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2019-11-24 04:03:53,551 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:03:53,920 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:15,132 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 283 [2019-11-24 04:04:15,136 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-11-24 04:04:15,178 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:04:15,180 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 04:04:15,191 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-11-24 04:04:15,218 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:04:15,220 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-11-24 04:04:15,287 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:04:15,768 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2019-11-24 04:04:15,932 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2019-11-24 04:04:16,169 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-11-24 04:04:16,431 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2019-11-24 04:04:16,672 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-24 04:04:16,953 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2019-11-24 04:04:17,805 WARN L192 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 106 [2019-11-24 04:04:18,712 WARN L192 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 113 [2019-11-24 04:04:19,005 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:04:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:04:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2019-11-24 04:04:19,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026624554] [2019-11-24 04:04:19,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-24 04:04:19,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:04:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-24 04:04:19,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-11-24 04:04:19,009 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 13 states. [2019-11-24 04:04:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:04:19,856 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-11-24 04:04:19,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-24 04:04:19,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-11-24 04:04:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:04:19,858 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:04:19,858 INFO L226 Difference]: Without dead ends: 50 [2019-11-24 04:04:19,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2019-11-24 04:04:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-24 04:04:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2019-11-24 04:04:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-24 04:04:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-24 04:04:19,866 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2019-11-24 04:04:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:04:19,866 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-24 04:04:19,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-24 04:04:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-24 04:04:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 04:04:19,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:04:19,868 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:04:20,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:04:20,069 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:04:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:04:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1630379559, now seen corresponding path program 1 times [2019-11-24 04:04:20,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:04:20,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992224342] [2019-11-24 04:04:20,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:04:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:04:20,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992224342] [2019-11-24 04:04:20,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785478767] [2019-11-24 04:04:20,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:04:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:04:20,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-24 04:04:20,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:04:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:04:20,342 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:04:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:04:20,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486305161] [2019-11-24 04:04:20,554 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-11-24 04:04:20,555 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:04:20,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:04:20,555 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:04:20,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:04:20,764 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:20,834 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:20,846 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:20,858 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:20,930 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:21,304 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:21,384 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:21,396 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:22,779 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:04:23,148 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:23,450 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 347 [2019-11-24 04:04:23,578 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:23,798 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-24 04:04:24,119 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 342 [2019-11-24 04:04:24,406 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-24 04:04:24,427 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:24,550 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:24,767 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-24 04:04:25,027 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 04:04:25,291 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 307 [2019-11-24 04:04:25,362 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,383 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,475 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,498 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,519 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,678 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 290 [2019-11-24 04:04:25,697 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,717 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,775 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,794 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,813 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,832 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,852 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:25,878 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:04:27,910 WARN L227 Elim1Store]: Array PQE input equivalent to false