/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_spec27_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:56:37,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:56:37,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:56:37,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:56:37,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:56:37,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:56:37,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:56:37,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:56:37,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:56:37,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:56:37,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:56:37,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:56:37,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:56:37,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:56:37,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:56:37,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:56:37,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:56:37,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:56:37,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:56:37,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:56:37,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:56:37,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:56:37,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:56:37,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:56:37,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:56:37,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:56:37,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:56:37,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:56:37,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:56:37,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:56:37,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:56:37,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:56:37,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:56:37,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:56:37,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:56:37,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:56:37,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:56:37,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:56:37,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:56:37,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:56:37,725 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:56:37,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:56:37,726 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:56:37,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:56:37,726 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:56:37,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:56:37,726 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:56:37,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:56:37,729 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:56:37,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:56:37,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:56:37,729 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:56:37,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:56:37,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:56:37,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:56:37,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:56:37,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:56:37,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:56:37,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:56:37,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:56:37,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:56:37,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:56:37,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:56:37,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:56:37,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:56:37,736 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:56:37,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:56:37,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:56:37,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:56:37,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:56:38,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:56:38,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:56:38,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:56:38,041 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:56:38,041 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:56:38,042 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec27_product18.cil.c [2019-11-24 04:56:38,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1d1850e/c91422fca8b44badaf4efee1ce5f26aa/FLAG9aee82442 [2019-11-24 04:56:38,763 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:56:38,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec27_product18.cil.c [2019-11-24 04:56:38,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1d1850e/c91422fca8b44badaf4efee1ce5f26aa/FLAG9aee82442 [2019-11-24 04:56:38,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1d1850e/c91422fca8b44badaf4efee1ce5f26aa [2019-11-24 04:56:38,963 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:56:38,965 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:56:38,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:56:38,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:56:38,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:56:38,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:56:38" (1/1) ... [2019-11-24 04:56:38,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8940e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:38, skipping insertion in model container [2019-11-24 04:56:38,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:56:38" (1/1) ... [2019-11-24 04:56:38,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:56:39,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:56:39,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:56:39,847 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:56:39,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:56:40,063 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:56:40,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40 WrapperNode [2019-11-24 04:56:40,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:56:40,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:56:40,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:56:40,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:56:40,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:56:40,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:56:40,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:56:40,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:56:40,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (1/1) ... [2019-11-24 04:56:40,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:56:40,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:56:40,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:56:40,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:56:40,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (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 04:56:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:56:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:56:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:56:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:56:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:56:47,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:56:47,600 INFO L284 CfgBuilder]: Removed 267 assume(true) statements. [2019-11-24 04:56:47,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:56:47 BoogieIcfgContainer [2019-11-24 04:56:47,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:56:47,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:56:47,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:56:47,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:56:47,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:56:38" (1/3) ... [2019-11-24 04:56:47,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1528e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:56:47, skipping insertion in model container [2019-11-24 04:56:47,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:40" (2/3) ... [2019-11-24 04:56:47,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1528e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:56:47, skipping insertion in model container [2019-11-24 04:56:47,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:56:47" (3/3) ... [2019-11-24 04:56:47,617 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec27_product18.cil.c [2019-11-24 04:56:47,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:56:47,633 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:56:47,645 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:56:47,669 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:56:47,670 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:56:47,670 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:56:47,670 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:56:47,670 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:56:47,670 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:56:47,670 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:56:47,670 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:56:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 04:56:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:56:47,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:47,694 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:47,695 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -935332012, now seen corresponding path program 1 times [2019-11-24 04:56:47,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:47,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332696753] [2019-11-24 04:56:47,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:48,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332696753] [2019-11-24 04:56:48,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:48,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:56:48,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843635783] [2019-11-24 04:56:48,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:56:48,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:56:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:56:48,122 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 04:56:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:48,144 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 04:56:48,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:56:48,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:56:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:48,158 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:56:48,158 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 04:56:48,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:56:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 04:56:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 04:56:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 04:56:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 04:56:48,210 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 04:56:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:48,211 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 04:56:48,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:56:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 04:56:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:56:48,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:48,280 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:48,280 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash 162509392, now seen corresponding path program 1 times [2019-11-24 04:56:48,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:48,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413203286] [2019-11-24 04:56:48,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:48,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413203286] [2019-11-24 04:56:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:48,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:48,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387101890] [2019-11-24 04:56:48,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:48,459 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 04:56:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:48,480 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 04:56:48,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:48,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:56:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:48,482 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:56:48,482 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 04:56:48,484 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 04:56:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 04:56:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 04:56:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 04:56:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 04:56:48,500 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 04:56:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:48,501 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 04:56:48,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 04:56:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:56:48,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:48,504 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:48,504 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1290304613, now seen corresponding path program 1 times [2019-11-24 04:56:48,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:48,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320509964] [2019-11-24 04:56:48,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:49,010 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 04:56:49,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320509964] [2019-11-24 04:56:49,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:49,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:56:49,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106088937] [2019-11-24 04:56:49,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:56:49,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:56:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:56:49,013 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 6 states. [2019-11-24 04:56:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:49,390 INFO L93 Difference]: Finished difference Result 128 states and 220 transitions. [2019-11-24 04:56:49,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:56:49,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-24 04:56:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:49,394 INFO L225 Difference]: With dead ends: 128 [2019-11-24 04:56:49,395 INFO L226 Difference]: Without dead ends: 119 [2019-11-24 04:56:49,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:56:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-24 04:56:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2019-11-24 04:56:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-24 04:56:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 154 transitions. [2019-11-24 04:56:49,429 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 154 transitions. Word has length 12 [2019-11-24 04:56:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:49,429 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 154 transitions. [2019-11-24 04:56:49,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:56:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 154 transitions. [2019-11-24 04:56:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:56:49,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:49,431 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:49,431 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1836766760, now seen corresponding path program 1 times [2019-11-24 04:56:49,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:49,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887076273] [2019-11-24 04:56:49,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:49,513 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 04:56:49,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887076273] [2019-11-24 04:56:49,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:49,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:49,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478953197] [2019-11-24 04:56:49,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:49,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:49,519 INFO L87 Difference]: Start difference. First operand 87 states and 154 transitions. Second operand 3 states. [2019-11-24 04:56:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:49,559 INFO L93 Difference]: Finished difference Result 229 states and 407 transitions. [2019-11-24 04:56:49,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:49,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:56:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:49,561 INFO L225 Difference]: With dead ends: 229 [2019-11-24 04:56:49,562 INFO L226 Difference]: Without dead ends: 146 [2019-11-24 04:56:49,563 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 04:56:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-24 04:56:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2019-11-24 04:56:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-24 04:56:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 241 transitions. [2019-11-24 04:56:49,584 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 241 transitions. Word has length 13 [2019-11-24 04:56:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:49,585 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 241 transitions. [2019-11-24 04:56:49,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 241 transitions. [2019-11-24 04:56:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:56:49,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:49,586 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:49,587 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash -768514603, now seen corresponding path program 1 times [2019-11-24 04:56:49,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:49,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650195706] [2019-11-24 04:56:49,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:49,829 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 04:56:49,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650195706] [2019-11-24 04:56:49,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:49,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:56:49,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572157132] [2019-11-24 04:56:49,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:56:49,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:56:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:56:49,834 INFO L87 Difference]: Start difference. First operand 133 states and 241 transitions. Second operand 5 states. [2019-11-24 04:56:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:50,098 INFO L93 Difference]: Finished difference Result 172 states and 302 transitions. [2019-11-24 04:56:50,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:56:50,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-24 04:56:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:50,101 INFO L225 Difference]: With dead ends: 172 [2019-11-24 04:56:50,101 INFO L226 Difference]: Without dead ends: 163 [2019-11-24 04:56:50,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:56:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-24 04:56:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2019-11-24 04:56:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-24 04:56:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 283 transitions. [2019-11-24 04:56:50,133 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 283 transitions. Word has length 14 [2019-11-24 04:56:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:50,133 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 283 transitions. [2019-11-24 04:56:50,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:56:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 283 transitions. [2019-11-24 04:56:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:56:50,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:50,135 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:50,135 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1610924175, now seen corresponding path program 1 times [2019-11-24 04:56:50,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:50,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471894005] [2019-11-24 04:56:50,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:50,436 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 04:56:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471894005] [2019-11-24 04:56:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121026284] [2019-11-24 04:56:50,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:56:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:50,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:56:50,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:56:50,897 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 04:56:50,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:56:50,932 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 04:56:50,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254047793] [2019-11-24 04:56:50,983 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 04:56:50,983 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:56:50,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:56:50,995 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:56:50,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:57:24,551 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 665 [2019-11-24 04:57:28,148 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 269 DAG size of output: 219 [2019-11-24 04:57:28,628 WARN L192 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 697 [2019-11-24 04:57:28,831 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8