/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/email_spec4_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:02:46,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:02:46,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:02:46,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:02:46,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:02:46,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:02:46,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:02:46,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:02:46,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:02:46,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:02:46,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:02:46,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:02:46,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:02:46,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:02:46,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:02:46,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:02:46,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:02:46,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:02:46,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:02:46,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:02:46,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:02:46,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:02:46,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:02:46,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:02:46,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:02:46,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:02:46,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:02:46,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:02:46,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:02:46,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:02:46,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:02:46,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:02:46,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:02:46,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:02:46,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:02:46,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:02:46,923 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:02:46,938 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:02:46,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:02:46,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:02:46,940 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:02:46,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:02:46,940 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:02:46,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:02:46,940 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:02:46,941 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:02:46,941 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:02:46,941 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:02:46,941 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:02:46,941 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:02:46,942 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:02:46,942 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:02:46,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:02:46,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:02:46,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:02:46,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:02:46,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:02:46,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:02:46,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:02:46,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:02:46,944 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:02:46,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:02:46,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:02:46,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:02:46,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:02:46,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:02:46,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:02:46,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:02:46,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:02:46,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:02:46,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:02:46,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:02:46,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:02:46,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:02:46,947 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:02:47,242 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:02:47,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:02:47,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:02:47,260 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:02:47,260 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:02:47,261 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product18.cil.c [2019-11-24 05:02:47,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5730412/5980da0cd6f746aeb8980d843074708a/FLAG36f0a5146 [2019-11-24 05:02:47,972 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:02:47,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product18.cil.c [2019-11-24 05:02:47,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5730412/5980da0cd6f746aeb8980d843074708a/FLAG36f0a5146 [2019-11-24 05:02:48,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5730412/5980da0cd6f746aeb8980d843074708a [2019-11-24 05:02:48,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:02:48,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:02:48,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:02:48,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:02:48,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:02:48,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:02:48" (1/1) ... [2019-11-24 05:02:48,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d9ee48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:48, skipping insertion in model container [2019-11-24 05:02:48,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:02:48" (1/1) ... [2019-11-24 05:02:48,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:02:48,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:02:49,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:02:49,106 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:02:49,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:02:49,320 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:02:49,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49 WrapperNode [2019-11-24 05:02:49,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:02:49,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:02:49,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:02:49,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:02:49,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:02:49,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:02:49,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:02:49,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:02:49,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... [2019-11-24 05:02:49,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:02:49,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:02:49,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:02:49,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:02:49,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:02:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:02:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:02:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:02:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:02:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:02:55,817 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:02:55,817 INFO L284 CfgBuilder]: Removed 263 assume(true) statements. [2019-11-24 05:02:55,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:02:55 BoogieIcfgContainer [2019-11-24 05:02:55,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:02:55,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:02:55,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:02:55,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:02:55,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:02:48" (1/3) ... [2019-11-24 05:02:55,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca964f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:02:55, skipping insertion in model container [2019-11-24 05:02:55,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:02:49" (2/3) ... [2019-11-24 05:02:55,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca964f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:02:55, skipping insertion in model container [2019-11-24 05:02:55,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:02:55" (3/3) ... [2019-11-24 05:02:55,831 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product18.cil.c [2019-11-24 05:02:55,839 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:02:55,847 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:02:55,858 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:02:55,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:02:55,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:02:55,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:02:55,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:02:55,879 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:02:55,880 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:02:55,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:02:55,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:02:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:02:55,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:02:55,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:02:55,900 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:02:55,900 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:02:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:02:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash -586004863, now seen corresponding path program 1 times [2019-11-24 05:02:55,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:02:55,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70423878] [2019-11-24 05:02:55,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:02:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:56,269 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 05:02:56,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70423878] [2019-11-24 05:02:56,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:02:56,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:02:56,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011595006] [2019-11-24 05:02:56,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:02:56,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:02:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:02:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:02:56,287 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:02:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:02:56,309 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:02:56,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:02:56,310 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:02:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:02:56,320 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:02:56,320 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:02:56,323 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 05:02:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:02:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:02:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:02:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:02:56,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:02:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:02:56,360 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:02:56,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:02:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:02:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:02:56,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:02:56,362 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:02:56,362 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:02:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:02:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1812961652, now seen corresponding path program 1 times [2019-11-24 05:02:56,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:02:56,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387450497] [2019-11-24 05:02:56,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:02:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:56,550 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 05:02:56,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387450497] [2019-11-24 05:02:56,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:02:56,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:02:56,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794372083] [2019-11-24 05:02:56,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:02:56,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:02:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:02:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:02:56,553 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:02:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:02:56,575 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:02:56,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:02:56,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:02:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:02:56,579 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:02:56,579 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:02:56,580 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 05:02:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:02:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:02:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:02:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:02:56,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:02:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:02:56,594 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:02:56,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:02:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:02:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:02:56,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:02:56,596 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:02:56,596 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:02:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:02:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1240811544, now seen corresponding path program 1 times [2019-11-24 05:02:56,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:02:56,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302120905] [2019-11-24 05:02:56,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:02:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:56,930 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 05:02:56,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302120905] [2019-11-24 05:02:56,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:02:56,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:02:56,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34957160] [2019-11-24 05:02:56,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:02:56,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:02:56,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:02:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:02:56,933 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 5 states. [2019-11-24 05:02:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:02:57,246 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-11-24 05:02:57,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:02:57,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 05:02:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:02:57,249 INFO L225 Difference]: With dead ends: 76 [2019-11-24 05:02:57,249 INFO L226 Difference]: Without dead ends: 74 [2019-11-24 05:02:57,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:02:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-24 05:02:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2019-11-24 05:02:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-24 05:02:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 113 transitions. [2019-11-24 05:02:57,264 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 113 transitions. Word has length 12 [2019-11-24 05:02:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:02:57,264 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 113 transitions. [2019-11-24 05:02:57,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:02:57,264 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 113 transitions. [2019-11-24 05:02:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 05:02:57,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:02:57,266 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:02:57,266 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:02:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:02:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash -341364470, now seen corresponding path program 1 times [2019-11-24 05:02:57,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:02:57,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674391534] [2019-11-24 05:02:57,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:02:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:57,339 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 05:02:57,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674391534] [2019-11-24 05:02:57,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:02:57,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:02:57,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879301011] [2019-11-24 05:02:57,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:02:57,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:02:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:02:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:02:57,342 INFO L87 Difference]: Start difference. First operand 66 states and 113 transitions. Second operand 3 states. [2019-11-24 05:02:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:02:57,376 INFO L93 Difference]: Finished difference Result 188 states and 327 transitions. [2019-11-24 05:02:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:02:57,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 05:02:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:02:57,379 INFO L225 Difference]: With dead ends: 188 [2019-11-24 05:02:57,379 INFO L226 Difference]: Without dead ends: 126 [2019-11-24 05:02:57,380 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 05:02:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-24 05:02:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2019-11-24 05:02:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-24 05:02:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 201 transitions. [2019-11-24 05:02:57,398 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 201 transitions. Word has length 14 [2019-11-24 05:02:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:02:57,398 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 201 transitions. [2019-11-24 05:02:57,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:02:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 201 transitions. [2019-11-24 05:02:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:02:57,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:02:57,400 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:02:57,401 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:02:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:02:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1413795550, now seen corresponding path program 1 times [2019-11-24 05:02:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:02:57,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156032634] [2019-11-24 05:02:57,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:02:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:02:57,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156032634] [2019-11-24 05:02:57,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115785992] [2019-11-24 05:02:57,567 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 05:02:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:02:57,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:02:57,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:02:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:02:57,986 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:02:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:02:58,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231594184] [2019-11-24 05:02:58,032 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 05:02:58,032 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:02:58,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:02:58,046 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:02:58,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:03:35,318 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 665 [2019-11-24 05:03:38,956 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 266 DAG size of output: 217 [2019-11-24 05:03:39,296 WARN L192 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 695 [2019-11-24 05:03:39,476 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8