/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/product-lines/email_spec4_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:02:52,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:02:52,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:02:52,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:02:52,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:02:52,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:02:52,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:02:52,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:02:52,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:02:52,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:02:52,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:02:52,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:02:52,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:02:52,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:02:52,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:02:52,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:02:52,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:02:52,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:02:52,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:02:52,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:02:52,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:02:52,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:02:52,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:02:52,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:02:52,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:02:52,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:02:52,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:02:52,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:02:52,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:02:52,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:02:52,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:02:52,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:02:52,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:02:52,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:02:52,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:02:52,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:02:52,133 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 05:02:52,158 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:02:52,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:02:52,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:02:52,160 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:02:52,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:02:52,160 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:02:52,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:02:52,160 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:02:52,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:02:52,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:02:52,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:02:52,161 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:02:52,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:02:52,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:02:52,162 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:02:52,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:02:52,163 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:02:52,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:02:52,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:02:52,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:02:52,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:02:52,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:02:52,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:02:52,164 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:02:52,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:02:52,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:02:52,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:02:52,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:02:52,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:02:52,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:02:52,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:02:52,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:02:52,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:02:52,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:02:52,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:02:52,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:02:52,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:02:52,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:02:52,457 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:02:52,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:02:52,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:02:52,479 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:02:52,480 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:02:52,480 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product19.cil.c [2019-11-24 05:02:52,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dabdd0b/45940549188048cf910ca1e3272d3741/FLAG5085efdd1 [2019-11-24 05:02:53,155 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:02:53,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product19.cil.c [2019-11-24 05:02:53,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dabdd0b/45940549188048cf910ca1e3272d3741/FLAG5085efdd1 [2019-11-24 05:02:53,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dabdd0b/45940549188048cf910ca1e3272d3741 [2019-11-24 05:02:53,371 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:02:53,373 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:02:53,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:02:53,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:02:53,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:02:53,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:02:53" (1/1) ... [2019-11-24 05:02:53,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12954213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:53, skipping insertion in model container [2019-11-24 05:02:53,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:02:53" (1/1) ... [2019-11-24 05:02:53,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:02:53,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:02:54,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:02:54,145 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:02:54,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:02:54,376 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:02:54,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54 WrapperNode [2019-11-24 05:02:54,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:02:54,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:02:54,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:02:54,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:02:54,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:02:54,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:02:54,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:02:54,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:02:54,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (1/1) ... [2019-11-24 05:02:54,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:02:54,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:02:54,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:02:54,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:02:54,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (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 05:02:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:02:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:02:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:02:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:02:54,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:03:01,318 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:03:01,318 INFO L284 CfgBuilder]: Removed 299 assume(true) statements. [2019-11-24 05:03:01,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:03:01 BoogieIcfgContainer [2019-11-24 05:03:01,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:03:01,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:03:01,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:03:01,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:03:01,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:02:53" (1/3) ... [2019-11-24 05:03:01,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5846118a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:03:01, skipping insertion in model container [2019-11-24 05:03:01,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:54" (2/3) ... [2019-11-24 05:03:01,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5846118a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:03:01, skipping insertion in model container [2019-11-24 05:03:01,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:03:01" (3/3) ... [2019-11-24 05:03:01,328 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product19.cil.c [2019-11-24 05:03:01,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:03:01,345 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:03:01,357 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:03:01,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:03:01,381 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:03:01,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:03:01,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:03:01,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:03:01,382 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:03:01,382 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:03:01,382 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:03:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:03:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:03:01,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:01,403 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:03:01,403 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2054983287, now seen corresponding path program 1 times [2019-11-24 05:03:01,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:01,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894348616] [2019-11-24 05:03:01,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:01,806 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 05:03:01,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894348616] [2019-11-24 05:03:01,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:01,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:03:01,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576822885] [2019-11-24 05:03:01,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:03:01,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:03:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:03:01,826 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:03:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:01,848 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:03:01,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:03:01,850 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:03:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:01,862 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:03:01,862 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:03:01,865 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 05:03:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:03:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:03:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:03:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:03:01,901 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:03:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:01,902 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:03:01,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:03:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:03:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:03:01,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:01,903 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:03:01,903 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:01,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2123047698, now seen corresponding path program 1 times [2019-11-24 05:03:01,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:01,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630283016] [2019-11-24 05:03:01,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:02,010 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 05:03:02,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630283016] [2019-11-24 05:03:02,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:02,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:02,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258660510] [2019-11-24 05:03:02,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:02,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:02,014 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:03:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:02,052 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:03:02,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:02,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:03:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:02,056 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:03:02,056 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:03:02,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:03:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:03:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:03:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:03:02,069 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:03:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:02,071 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:03:02,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:03:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:03:02,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:02,072 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:03:02,072 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1212935681, now seen corresponding path program 1 times [2019-11-24 05:03:02,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:02,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672868767] [2019-11-24 05:03:02,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:03:02,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672868767] [2019-11-24 05:03:02,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:02,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:03:02,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138307806] [2019-11-24 05:03:02,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:03:02,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:03:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:03:02,327 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 6 states. [2019-11-24 05:03:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:02,662 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2019-11-24 05:03:02,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:03:02,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-24 05:03:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:02,665 INFO L225 Difference]: With dead ends: 41 [2019-11-24 05:03:02,665 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:03:02,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:03:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:03:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-24 05:03:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:03:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:03:02,678 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 12 [2019-11-24 05:03:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:02,679 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:03:02,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:03:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:03:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:03:02,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:02,680 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:03:02,680 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1588655249, now seen corresponding path program 1 times [2019-11-24 05:03:02,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:02,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118003991] [2019-11-24 05:03:02,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:03:02,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118003991] [2019-11-24 05:03:02,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:02,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:03:02,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933202449] [2019-11-24 05:03:02,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:03:02,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:03:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:03:02,914 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 6 states. [2019-11-24 05:03:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:03,170 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2019-11-24 05:03:03,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:03:03,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:03:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:03,172 INFO L225 Difference]: With dead ends: 70 [2019-11-24 05:03:03,172 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 05:03:03,173 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:03:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 05:03:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-24 05:03:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 05:03:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2019-11-24 05:03:03,187 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 15 [2019-11-24 05:03:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:03,189 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2019-11-24 05:03:03,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:03:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2019-11-24 05:03:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:03:03,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:03,191 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:03:03,191 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1058250481, now seen corresponding path program 1 times [2019-11-24 05:03:03,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:03,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666611062] [2019-11-24 05:03:03,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:03,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666611062] [2019-11-24 05:03:03,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:03,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:03,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112246560] [2019-11-24 05:03:03,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:03,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:03,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:03,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:03,336 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand 3 states. [2019-11-24 05:03:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:03,362 INFO L93 Difference]: Finished difference Result 171 states and 298 transitions. [2019-11-24 05:03:03,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:03,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 05:03:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:03,364 INFO L225 Difference]: With dead ends: 171 [2019-11-24 05:03:03,364 INFO L226 Difference]: Without dead ends: 114 [2019-11-24 05:03:03,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-24 05:03:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2019-11-24 05:03:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-24 05:03:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 187 transitions. [2019-11-24 05:03:03,381 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 187 transitions. Word has length 20 [2019-11-24 05:03:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:03,381 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 187 transitions. [2019-11-24 05:03:03,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 187 transitions. [2019-11-24 05:03:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 05:03:03,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:03,383 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] [2019-11-24 05:03:03,383 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash 235667862, now seen corresponding path program 1 times [2019-11-24 05:03:03,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:03,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572001213] [2019-11-24 05:03:03,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:03,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572001213] [2019-11-24 05:03:03,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:03,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:03,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199630360] [2019-11-24 05:03:03,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:03,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:03,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:03,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:03,443 INFO L87 Difference]: Start difference. First operand 105 states and 187 transitions. Second operand 3 states. [2019-11-24 05:03:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:03,468 INFO L93 Difference]: Finished difference Result 307 states and 549 transitions. [2019-11-24 05:03:03,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:03,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 05:03:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:03,471 INFO L225 Difference]: With dead ends: 307 [2019-11-24 05:03:03,471 INFO L226 Difference]: Without dead ends: 204 [2019-11-24 05:03:03,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-24 05:03:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 195. [2019-11-24 05:03:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-11-24 05:03:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 351 transitions. [2019-11-24 05:03:03,519 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 351 transitions. Word has length 21 [2019-11-24 05:03:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:03,520 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 351 transitions. [2019-11-24 05:03:03,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 351 transitions. [2019-11-24 05:03:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 05:03:03,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:03,529 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] [2019-11-24 05:03:03,530 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1495640771, now seen corresponding path program 1 times [2019-11-24 05:03:03,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:03,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121656115] [2019-11-24 05:03:03,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:03,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121656115] [2019-11-24 05:03:03,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:03,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:03,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832057991] [2019-11-24 05:03:03,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:03,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:03,627 INFO L87 Difference]: Start difference. First operand 195 states and 351 transitions. Second operand 3 states. [2019-11-24 05:03:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:03,667 INFO L93 Difference]: Finished difference Result 573 states and 1033 transitions. [2019-11-24 05:03:03,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:03,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-24 05:03:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:03,671 INFO L225 Difference]: With dead ends: 573 [2019-11-24 05:03:03,672 INFO L226 Difference]: Without dead ends: 380 [2019-11-24 05:03:03,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-11-24 05:03:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 371. [2019-11-24 05:03:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2019-11-24 05:03:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 667 transitions. [2019-11-24 05:03:03,727 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 667 transitions. Word has length 22 [2019-11-24 05:03:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:03,727 INFO L462 AbstractCegarLoop]: Abstraction has 371 states and 667 transitions. [2019-11-24 05:03:03,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 667 transitions. [2019-11-24 05:03:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:03:03,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:03,731 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] [2019-11-24 05:03:03,731 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash 63696984, now seen corresponding path program 1 times [2019-11-24 05:03:03,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:03,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364087387] [2019-11-24 05:03:03,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:03,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364087387] [2019-11-24 05:03:03,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:03,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:03,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874271566] [2019-11-24 05:03:03,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:03,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:03,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:03,814 INFO L87 Difference]: Start difference. First operand 371 states and 667 transitions. Second operand 3 states. [2019-11-24 05:03:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:03,871 INFO L93 Difference]: Finished difference Result 1093 states and 1965 transitions. [2019-11-24 05:03:03,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:03,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 05:03:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:03,876 INFO L225 Difference]: With dead ends: 1093 [2019-11-24 05:03:03,876 INFO L226 Difference]: Without dead ends: 724 [2019-11-24 05:03:03,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-11-24 05:03:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 715. [2019-11-24 05:03:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2019-11-24 05:03:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1275 transitions. [2019-11-24 05:03:03,932 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1275 transitions. Word has length 23 [2019-11-24 05:03:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:03,933 INFO L462 AbstractCegarLoop]: Abstraction has 715 states and 1275 transitions. [2019-11-24 05:03:03,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1275 transitions. [2019-11-24 05:03:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 05:03:03,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:03,934 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 05:03:03,934 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:03,935 INFO L82 PathProgramCache]: Analyzing trace with hash 549018958, now seen corresponding path program 1 times [2019-11-24 05:03:03,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:03,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768519437] [2019-11-24 05:03:03,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:03,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768519437] [2019-11-24 05:03:03,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:03,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:03:03,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962760463] [2019-11-24 05:03:03,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:03:03,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:04,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:03:04,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:03:04,000 INFO L87 Difference]: Start difference. First operand 715 states and 1275 transitions. Second operand 3 states. [2019-11-24 05:03:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:04,104 INFO L93 Difference]: Finished difference Result 2109 states and 3757 transitions. [2019-11-24 05:03:04,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:03:04,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-24 05:03:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:04,113 INFO L225 Difference]: With dead ends: 2109 [2019-11-24 05:03:04,113 INFO L226 Difference]: Without dead ends: 1396 [2019-11-24 05:03:04,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:03:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2019-11-24 05:03:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1387. [2019-11-24 05:03:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1387 states. [2019-11-24 05:03:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2443 transitions. [2019-11-24 05:03:04,220 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2443 transitions. Word has length 24 [2019-11-24 05:03:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:04,220 INFO L462 AbstractCegarLoop]: Abstraction has 1387 states and 2443 transitions. [2019-11-24 05:03:04,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:03:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2443 transitions. [2019-11-24 05:03:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 05:03:04,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:04,222 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 05:03:04,222 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash 226970761, now seen corresponding path program 1 times [2019-11-24 05:03:04,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:04,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378444312] [2019-11-24 05:03:04,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:03:04,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378444312] [2019-11-24 05:03:04,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:03:04,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:03:04,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361460061] [2019-11-24 05:03:04,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:03:04,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:03:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:03:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:03:04,425 INFO L87 Difference]: Start difference. First operand 1387 states and 2443 transitions. Second operand 5 states. [2019-11-24 05:03:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:03:04,903 INFO L93 Difference]: Finished difference Result 2108 states and 3691 transitions. [2019-11-24 05:03:04,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:03:04,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-24 05:03:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:03:04,923 INFO L225 Difference]: With dead ends: 2108 [2019-11-24 05:03:04,923 INFO L226 Difference]: Without dead ends: 2102 [2019-11-24 05:03:04,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:03:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2019-11-24 05:03:05,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2093. [2019-11-24 05:03:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2093 states. [2019-11-24 05:03:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 3677 transitions. [2019-11-24 05:03:05,091 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 3677 transitions. Word has length 25 [2019-11-24 05:03:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:03:05,093 INFO L462 AbstractCegarLoop]: Abstraction has 2093 states and 3677 transitions. [2019-11-24 05:03:05,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:03:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 3677 transitions. [2019-11-24 05:03:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 05:03:05,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:03:05,096 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, 1] [2019-11-24 05:03:05,096 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:03:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:03:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1125379426, now seen corresponding path program 1 times [2019-11-24 05:03:05,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:03:05,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352341516] [2019-11-24 05:03:05,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:03:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:05,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352341516] [2019-11-24 05:03:05,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627101784] [2019-11-24 05:03:05,353 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 05:03:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:03:05,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:03:05,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:03:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:05,753 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:03:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:03:05,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912565946] [2019-11-24 05:03:05,816 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-11-24 05:03:05,816 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:03:05,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:03:05,829 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:03:05,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:03:41,158 WARN L192 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 664 [2019-11-24 05:03:44,521 WARN L192 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 281 DAG size of output: 229 [2019-11-24 05:03:44,895 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 698 [2019-11-24 05:03:47,645 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:49,243 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:50,614 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:51,909 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:53,299 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:54,720 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:56,115 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:57,484 WARN L192 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:03:58,827 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 1118 [2019-11-24 05:04:00,905 WARN L192 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:02,805 WARN L192 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:04,731 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:06,579 WARN L192 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:08,471 WARN L192 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:10,393 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 1126 [2019-11-24 05:04:13,622 WARN L192 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 1128 DAG size of output: 1128 [2019-11-24 05:04:16,401 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 1128 DAG size of output: 1128 [2019-11-24 05:04:20,035 WARN L192 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 1128 [2019-11-24 05:04:22,684 WARN L192 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 1128 DAG size of output: 1128 [2019-11-24 05:04:25,299 WARN L192 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 1128 DAG size of output: 1128