/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_spec8_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:12:37,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:12:37,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:12:37,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:12:37,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:12:37,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:12:37,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:12:37,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:12:37,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:12:37,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:12:37,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:12:37,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:12:37,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:12:37,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:12:37,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:12:37,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:12:37,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:12:37,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:12:37,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:12:37,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:12:37,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:12:37,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:12:37,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:12:37,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:12:37,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:12:37,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:12:37,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:12:37,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:12:37,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:12:37,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:12:37,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:12:37,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:12:37,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:12:37,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:12:37,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:12:37,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:12:37,895 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 05:12:37,919 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:12:37,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:12:37,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:12:37,921 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:12:37,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:12:37,922 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:12:37,922 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:12:37,922 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:12:37,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:12:37,922 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:12:37,923 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:12:37,923 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:12:37,923 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:12:37,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:12:37,923 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:12:37,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:12:37,924 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:12:37,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:12:37,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:12:37,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:12:37,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:12:37,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:12:37,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:12:37,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:12:37,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:12:37,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:12:37,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:12:37,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:12:37,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:12:37,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:12:37,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:12:37,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:12:37,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:12:37,931 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:12:37,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:12:37,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:12:37,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:12:37,932 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:12:38,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:12:38,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:12:38,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:12:38,209 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:12:38,209 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:12:38,210 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec8_product30.cil.c [2019-11-24 05:12:38,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee45ec7ca/a3ad379c66fe4ecab55a826891a6d36f/FLAGcb25244e3 [2019-11-24 05:12:38,913 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:12:38,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec8_product30.cil.c [2019-11-24 05:12:38,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee45ec7ca/a3ad379c66fe4ecab55a826891a6d36f/FLAGcb25244e3 [2019-11-24 05:12:39,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee45ec7ca/a3ad379c66fe4ecab55a826891a6d36f [2019-11-24 05:12:39,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:12:39,151 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:12:39,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:12:39,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:12:39,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:12:39,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:12:39" (1/1) ... [2019-11-24 05:12:39,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681192b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:39, skipping insertion in model container [2019-11-24 05:12:39,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:12:39" (1/1) ... [2019-11-24 05:12:39,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:12:39,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:12:40,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:12:40,047 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:12:40,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:12:40,233 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:12:40,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40 WrapperNode [2019-11-24 05:12:40,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:12:40,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:12:40,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:12:40,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:12:40,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:12:40,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:12:40,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:12:40,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:12:40,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (1/1) ... [2019-11-24 05:12:40,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:12:40,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:12:40,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:12:40,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:12:40,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (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 05:12:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:12:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:12:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:12:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:12:40,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:12:48,536 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:12:48,537 INFO L284 CfgBuilder]: Removed 323 assume(true) statements. [2019-11-24 05:12:48,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:12:48 BoogieIcfgContainer [2019-11-24 05:12:48,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:12:48,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:12:48,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:12:48,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:12:48,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:12:39" (1/3) ... [2019-11-24 05:12:48,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651213fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:12:48, skipping insertion in model container [2019-11-24 05:12:48,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:12:40" (2/3) ... [2019-11-24 05:12:48,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651213fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:12:48, skipping insertion in model container [2019-11-24 05:12:48,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:12:48" (3/3) ... [2019-11-24 05:12:48,548 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec8_product30.cil.c [2019-11-24 05:12:48,558 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:12:48,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:12:48,576 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:12:48,601 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:12:48,601 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:12:48,602 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:12:48,602 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:12:48,602 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:12:48,602 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:12:48,602 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:12:48,602 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:12:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:12:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:12:48,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:48,625 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:48,625 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1146198533, now seen corresponding path program 1 times [2019-11-24 05:12:48,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:48,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403481693] [2019-11-24 05:12:48,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:49,016 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 05:12:49,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403481693] [2019-11-24 05:12:49,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:49,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:12:49,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266240545] [2019-11-24 05:12:49,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:12:49,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:12:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:12:49,040 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:12:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:49,062 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:12:49,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:12:49,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:12:49,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:49,076 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:12:49,076 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:12:49,079 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 05:12:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:12:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:12:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:12:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:12:49,115 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:12:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:49,115 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:12:49,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:12:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:12:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:12:49,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:49,117 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:49,117 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1560672799, now seen corresponding path program 1 times [2019-11-24 05:12:49,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:49,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575155289] [2019-11-24 05:12:49,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:49,256 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 05:12:49,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575155289] [2019-11-24 05:12:49,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:49,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:12:49,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021526579] [2019-11-24 05:12:49,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:12:49,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:12:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:12:49,260 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:12:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:49,278 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:12:49,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:12:49,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:12:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:49,279 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:12:49,280 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:12:49,281 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 05:12:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:12:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:12:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:12:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:12:49,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:12:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:49,289 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:12:49,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:12:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:12:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:12:49,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:49,290 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:49,291 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1517504627, now seen corresponding path program 1 times [2019-11-24 05:12:49,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:49,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079859358] [2019-11-24 05:12:49,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:49,437 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 05:12:49,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079859358] [2019-11-24 05:12:49,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:49,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:12:49,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254140350] [2019-11-24 05:12:49,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:12:49,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:12:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:12:49,442 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:12:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:49,481 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:12:49,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:12:49,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:12:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:49,484 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:12:49,484 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:12:49,486 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 05:12:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:12:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:12:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:12:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:12:49,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:12:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:49,498 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:12:49,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:12:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:12:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:12:49,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:49,500 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:49,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1760474374, now seen corresponding path program 1 times [2019-11-24 05:12:49,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:49,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871543237] [2019-11-24 05:12:49,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:49,948 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 05:12:49,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871543237] [2019-11-24 05:12:49,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:49,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:12:49,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686433653] [2019-11-24 05:12:49,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:12:49,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:12:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:12:49,951 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:12:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:50,335 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:12:50,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:12:50,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:12:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:50,337 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:12:50,338 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:12:50,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:12:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:12:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:12:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:12:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:12:50,352 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:12:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:50,352 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:12:50,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:12:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:12:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:12:50,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:50,358 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:50,358 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1711024946, now seen corresponding path program 1 times [2019-11-24 05:12:50,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:50,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036867021] [2019-11-24 05:12:50,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:50,430 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 05:12:50,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036867021] [2019-11-24 05:12:50,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:50,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:12:50,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122645413] [2019-11-24 05:12:50,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:12:50,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:12:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:12:50,433 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:12:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:50,459 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:12:50,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:12:50,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:12:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:50,462 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:12:50,462 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:12:50,463 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 05:12:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:12:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:12:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:12:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:12:50,480 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:12:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:50,480 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:12:50,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:12:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:12:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:12:50,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:50,482 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:50,482 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:50,483 INFO L82 PathProgramCache]: Analyzing trace with hash 315855515, now seen corresponding path program 1 times [2019-11-24 05:12:50,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:50,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848825799] [2019-11-24 05:12:50,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:50,899 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 05:12:50,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848825799] [2019-11-24 05:12:50,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:12:50,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 05:12:50,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140095615] [2019-11-24 05:12:50,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 05:12:50,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:12:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 05:12:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:12:50,903 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 7 states. [2019-11-24 05:12:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:12:51,604 INFO L93 Difference]: Finished difference Result 160 states and 281 transitions. [2019-11-24 05:12:51,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 05:12:51,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-24 05:12:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:12:51,609 INFO L225 Difference]: With dead ends: 160 [2019-11-24 05:12:51,609 INFO L226 Difference]: Without dead ends: 152 [2019-11-24 05:12:51,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:12:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-24 05:12:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-11-24 05:12:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-24 05:12:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 269 transitions. [2019-11-24 05:12:51,646 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 269 transitions. Word has length 17 [2019-11-24 05:12:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:12:51,646 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 269 transitions. [2019-11-24 05:12:51,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 05:12:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 269 transitions. [2019-11-24 05:12:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:12:51,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:12:51,648 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:12:51,648 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:12:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:12:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1521979170, now seen corresponding path program 1 times [2019-11-24 05:12:51,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:12:51,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159681390] [2019-11-24 05:12:51,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:12:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:51,830 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 05:12:51,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159681390] [2019-11-24 05:12:51,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646010348] [2019-11-24 05:12:51,831 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 05:12:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:12:52,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:12:52,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:12:52,226 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 05:12:52,226 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:12:52,262 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 05:12:52,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639984481] [2019-11-24 05:12:52,289 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:12:52,290 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:12:52,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:12:52,303 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:12:52,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:14:08,940 WARN L192 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 723 [2019-11-24 05:14:13,438 WARN L192 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 323 DAG size of output: 263 [2019-11-24 05:14:13,908 WARN L192 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 762 [2019-11-24 05:14:14,152 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8