/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_spec9_product16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:14:25,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:14:25,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:14:25,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:14:25,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:14:25,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:14:25,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:14:25,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:14:25,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:14:25,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:14:25,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:14:25,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:14:25,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:14:25,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:14:25,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:14:25,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:14:25,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:14:25,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:14:25,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:14:25,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:14:25,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:14:25,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:14:25,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:14:25,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:14:25,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:14:25,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:14:25,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:14:25,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:14:25,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:14:25,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:14:25,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:14:25,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:14:25,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:14:25,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:14:25,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:14:25,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:14:25,148 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 05:14:25,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:14:25,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:14:25,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:14:25,172 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:14:25,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:14:25,172 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:14:25,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:14:25,173 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:14:25,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:14:25,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:14:25,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:14:25,173 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:14:25,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:14:25,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:14:25,174 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:14:25,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:14:25,175 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:14:25,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:14:25,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:14:25,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:14:25,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:14:25,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:14:25,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:14:25,176 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:14:25,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:14:25,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:14:25,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:14:25,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:14:25,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:14:25,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:14:25,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:14:25,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:14:25,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:14:25,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:14:25,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:14:25,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:14:25,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:14:25,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:14:25,510 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:14:25,535 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:14:25,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:14:25,541 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:14:25,541 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:14:25,542 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product16.cil.c [2019-11-24 05:14:25,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49818a7d2/2b0c35a87c534400800bbe9548bc67ce/FLAGd61c125f6 [2019-11-24 05:14:26,195 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:14:26,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product16.cil.c [2019-11-24 05:14:26,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49818a7d2/2b0c35a87c534400800bbe9548bc67ce/FLAGd61c125f6 [2019-11-24 05:14:26,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49818a7d2/2b0c35a87c534400800bbe9548bc67ce [2019-11-24 05:14:26,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:14:26,490 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:14:26,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:26,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:14:26,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:14:26,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:26" (1/1) ... [2019-11-24 05:14:26,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37800228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:26, skipping insertion in model container [2019-11-24 05:14:26,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:26" (1/1) ... [2019-11-24 05:14:26,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:14:26,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:14:27,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:27,350 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:14:27,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:27,616 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:14:27,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27 WrapperNode [2019-11-24 05:14:27,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:27,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:27,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:14:27,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:14:27,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:27,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:14:27,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:14:27,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:14:27,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (1/1) ... [2019-11-24 05:14:27,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:14:27,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:14:27,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:14:27,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:14:27,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (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 05:14:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:14:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:14:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:14:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:14:28,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:14:34,927 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:14:34,927 INFO L284 CfgBuilder]: Removed 295 assume(true) statements. [2019-11-24 05:14:34,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:34 BoogieIcfgContainer [2019-11-24 05:14:34,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:14:34,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:14:34,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:14:34,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:14:34,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:14:26" (1/3) ... [2019-11-24 05:14:34,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64922a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:34, skipping insertion in model container [2019-11-24 05:14:34,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:27" (2/3) ... [2019-11-24 05:14:34,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64922a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:34, skipping insertion in model container [2019-11-24 05:14:34,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:34" (3/3) ... [2019-11-24 05:14:34,938 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product16.cil.c [2019-11-24 05:14:34,946 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:14:34,952 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:14:34,963 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:14:34,983 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:14:34,984 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:14:34,984 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:14:34,984 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:14:34,984 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:14:34,984 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:14:34,984 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:14:34,985 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:14:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:14:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:14:35,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:35,005 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:35,005 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -611952941, now seen corresponding path program 1 times [2019-11-24 05:14:35,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:35,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294687415] [2019-11-24 05:14:35,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:35,398 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 05:14:35,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294687415] [2019-11-24 05:14:35,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:35,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:35,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459648696] [2019-11-24 05:14:35,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:14:35,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:14:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:14:35,423 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:14:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:35,445 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:14:35,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:14:35,447 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:14:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:35,459 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:14:35,459 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:14:35,462 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 05:14:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:14:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:14:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:14:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:14:35,502 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:14:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:35,503 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:14:35,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:14:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:14:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:14:35,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:35,504 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:35,505 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1968396768, now seen corresponding path program 1 times [2019-11-24 05:14:35,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:35,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685685335] [2019-11-24 05:14:35,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:35,646 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 05:14:35,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685685335] [2019-11-24 05:14:35,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:35,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:35,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952222354] [2019-11-24 05:14:35,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:35,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:35,650 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:14:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:35,675 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:14:35,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:35,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:14:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:35,678 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:14:35,678 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:14:35,680 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 05:14:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:14:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:14:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:14:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:14:35,693 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:14:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:35,693 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:14:35,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:14:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:14:35,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:35,694 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:35,695 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash -658612073, now seen corresponding path program 1 times [2019-11-24 05:14:35,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:35,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333247680] [2019-11-24 05:14:35,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:35,805 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 05:14:35,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333247680] [2019-11-24 05:14:35,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:35,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:35,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726229582] [2019-11-24 05:14:35,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:35,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:35,808 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:14:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:35,859 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:14:35,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:35,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:14:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:35,861 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:14:35,861 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:14:35,862 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 05:14:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:14:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:14:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:14:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:14:35,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:14:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:35,875 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:14:35,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:14:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:14:35,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:35,877 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:35,878 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash -542066522, now seen corresponding path program 1 times [2019-11-24 05:14:35,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:35,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105326462] [2019-11-24 05:14:35,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:36,334 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 05:14:36,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105326462] [2019-11-24 05:14:36,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:36,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:14:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154392940] [2019-11-24 05:14:36,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:14:36,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:14:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:14:36,336 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:14:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:36,646 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:14:36,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:14:36,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:14:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:36,650 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:14:36,650 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:14:36,655 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 05:14:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:14:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:14:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:14:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:14:36,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:14:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:36,671 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:14:36,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:14:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:14:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:14:36,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:36,674 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 05:14:36,675 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash -673855897, now seen corresponding path program 1 times [2019-11-24 05:14:36,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:36,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525778381] [2019-11-24 05:14:36,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:36,744 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 05:14:36,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525778381] [2019-11-24 05:14:36,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:36,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:36,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602471420] [2019-11-24 05:14:36,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:36,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:36,746 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:14:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:36,774 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:14:36,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:36,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 05:14:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:36,776 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:14:36,776 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:14:36,777 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 05:14:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:14:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:14:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:14:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:14:36,792 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 20 [2019-11-24 05:14:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:36,792 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:14:36,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:14:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 05:14:36,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:36,794 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 05:14:36,794 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1974830584, now seen corresponding path program 1 times [2019-11-24 05:14:36,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:36,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996018404] [2019-11-24 05:14:36,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:36,866 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 05:14:36,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996018404] [2019-11-24 05:14:36,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:36,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:36,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605466241] [2019-11-24 05:14:36,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:36,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:36,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:36,869 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 3 states. [2019-11-24 05:14:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:36,893 INFO L93 Difference]: Finished difference Result 304 states and 543 transitions. [2019-11-24 05:14:36,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:36,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 05:14:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:36,896 INFO L225 Difference]: With dead ends: 304 [2019-11-24 05:14:36,896 INFO L226 Difference]: Without dead ends: 202 [2019-11-24 05:14:36,897 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 05:14:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-24 05:14:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2019-11-24 05:14:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-24 05:14:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 349 transitions. [2019-11-24 05:14:36,921 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 349 transitions. Word has length 21 [2019-11-24 05:14:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:36,922 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 349 transitions. [2019-11-24 05:14:36,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 349 transitions. [2019-11-24 05:14:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 05:14:36,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:36,924 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 05:14:36,924 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash -708338731, now seen corresponding path program 1 times [2019-11-24 05:14:36,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:36,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563518431] [2019-11-24 05:14:36,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:36,997 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 05:14:36,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563518431] [2019-11-24 05:14:36,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:36,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:36,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940589824] [2019-11-24 05:14:36,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:36,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:36,999 INFO L87 Difference]: Start difference. First operand 194 states and 349 transitions. Second operand 3 states. [2019-11-24 05:14:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:37,030 INFO L93 Difference]: Finished difference Result 570 states and 1027 transitions. [2019-11-24 05:14:37,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:37,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-24 05:14:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:37,033 INFO L225 Difference]: With dead ends: 570 [2019-11-24 05:14:37,033 INFO L226 Difference]: Without dead ends: 378 [2019-11-24 05:14:37,035 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 05:14:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-11-24 05:14:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2019-11-24 05:14:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2019-11-24 05:14:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 665 transitions. [2019-11-24 05:14:37,071 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 665 transitions. Word has length 22 [2019-11-24 05:14:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:37,071 INFO L462 AbstractCegarLoop]: Abstraction has 370 states and 665 transitions. [2019-11-24 05:14:37,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 665 transitions. [2019-11-24 05:14:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:14:37,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:37,073 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 05:14:37,074 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1408088954, now seen corresponding path program 1 times [2019-11-24 05:14:37,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:37,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200992948] [2019-11-24 05:14:37,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:37,136 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 05:14:37,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200992948] [2019-11-24 05:14:37,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:37,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:37,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449850552] [2019-11-24 05:14:37,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:37,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:37,138 INFO L87 Difference]: Start difference. First operand 370 states and 665 transitions. Second operand 3 states. [2019-11-24 05:14:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:37,191 INFO L93 Difference]: Finished difference Result 1090 states and 1959 transitions. [2019-11-24 05:14:37,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:37,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 05:14:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:37,196 INFO L225 Difference]: With dead ends: 1090 [2019-11-24 05:14:37,196 INFO L226 Difference]: Without dead ends: 722 [2019-11-24 05:14:37,197 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 05:14:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-11-24 05:14:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 714. [2019-11-24 05:14:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-11-24 05:14:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1273 transitions. [2019-11-24 05:14:37,242 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1273 transitions. Word has length 23 [2019-11-24 05:14:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:37,242 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1273 transitions. [2019-11-24 05:14:37,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1273 transitions. [2019-11-24 05:14:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 05:14:37,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:37,245 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 05:14:37,245 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1983329574, now seen corresponding path program 1 times [2019-11-24 05:14:37,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:37,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626285996] [2019-11-24 05:14:37,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:37,312 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 05:14:37,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626285996] [2019-11-24 05:14:37,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:37,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:37,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079247409] [2019-11-24 05:14:37,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:37,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:37,314 INFO L87 Difference]: Start difference. First operand 714 states and 1273 transitions. Second operand 3 states. [2019-11-24 05:14:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:37,412 INFO L93 Difference]: Finished difference Result 2106 states and 3751 transitions. [2019-11-24 05:14:37,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:37,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-24 05:14:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:37,421 INFO L225 Difference]: With dead ends: 2106 [2019-11-24 05:14:37,421 INFO L226 Difference]: Without dead ends: 1394 [2019-11-24 05:14:37,423 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 05:14:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2019-11-24 05:14:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1386. [2019-11-24 05:14:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1386 states. [2019-11-24 05:14:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2441 transitions. [2019-11-24 05:14:37,510 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2441 transitions. Word has length 24 [2019-11-24 05:14:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:37,511 INFO L462 AbstractCegarLoop]: Abstraction has 1386 states and 2441 transitions. [2019-11-24 05:14:37,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2441 transitions. [2019-11-24 05:14:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 05:14:37,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:37,513 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 05:14:37,513 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash 153792107, now seen corresponding path program 1 times [2019-11-24 05:14:37,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:37,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675634287] [2019-11-24 05:14:37,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:37,840 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 05:14:37,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675634287] [2019-11-24 05:14:37,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:37,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:14:37,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508122756] [2019-11-24 05:14:37,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:14:37,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:37,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:14:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:14:37,843 INFO L87 Difference]: Start difference. First operand 1386 states and 2441 transitions. Second operand 6 states. [2019-11-24 05:14:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:38,248 INFO L93 Difference]: Finished difference Result 1578 states and 2764 transitions. [2019-11-24 05:14:38,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:14:38,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-24 05:14:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:38,267 INFO L225 Difference]: With dead ends: 1578 [2019-11-24 05:14:38,268 INFO L226 Difference]: Without dead ends: 1570 [2019-11-24 05:14:38,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:14:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2019-11-24 05:14:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1562. [2019-11-24 05:14:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1562 states. [2019-11-24 05:14:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2737 transitions. [2019-11-24 05:14:38,364 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2737 transitions. Word has length 25 [2019-11-24 05:14:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:38,364 INFO L462 AbstractCegarLoop]: Abstraction has 1562 states and 2737 transitions. [2019-11-24 05:14:38,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:14:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2737 transitions. [2019-11-24 05:14:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 05:14:38,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:38,366 INFO L410 BasicCegarLoop]: trace histogram [3, 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 05:14:38,367 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1185687535, now seen corresponding path program 1 times [2019-11-24 05:14:38,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:38,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420080531] [2019-11-24 05:14:38,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:38,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420080531] [2019-11-24 05:14:38,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355772317] [2019-11-24 05:14:38,510 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 05:14:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:38,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:14:38,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:14:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:38,954 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:14:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:38,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714665717] [2019-11-24 05:14:39,036 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-11-24 05:14:39,036 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:14:39,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:14:39,052 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:14:39,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:15:28,789 WARN L192 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 689 [2019-11-24 05:15:32,648 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 301 DAG size of output: 245 [2019-11-24 05:15:33,036 WARN L192 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 727 [2019-11-24 05:15:33,339 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8