/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_spec1_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:55:04,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:55:04,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:55:04,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:55:04,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:55:04,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:55:04,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:55:04,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:55:04,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:55:04,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:55:04,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:55:04,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:55:04,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:55:04,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:55:04,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:55:04,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:55:04,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:55:04,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:55:04,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:55:04,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:55:04,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:55:04,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:55:04,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:55:04,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:55:04,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:55:04,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:55:04,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:55:04,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:55:04,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:55:04,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:55:04,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:55:04,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:55:04,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:55:04,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:55:04,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:55:04,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:55:04,629 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 04:55:04,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:55:04,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:55:04,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:55:04,645 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:55:04,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:55:04,645 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:55:04,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:55:04,645 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:55:04,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:55:04,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:55:04,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:55:04,646 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:55:04,646 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:55:04,647 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:55:04,647 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:55:04,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:55:04,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:55:04,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:55:04,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:55:04,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:55:04,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:55:04,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:55:04,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:55:04,649 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:55:04,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:55:04,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:55:04,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:55:04,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:55:04,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:55:04,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:55:04,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:55:04,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:55:04,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:55:04,651 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:55:04,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:55:04,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:55:04,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:55:04,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:55:04,894 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:55:04,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:55:04,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:55:04,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:55:04,915 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:55:04,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec1_product33.cil.c [2019-11-24 04:55:04,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fe14ca3/0e63c1d9028640549f95cc15ed79f15f/FLAG06f556904 [2019-11-24 04:55:05,605 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:55:05,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec1_product33.cil.c [2019-11-24 04:55:05,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fe14ca3/0e63c1d9028640549f95cc15ed79f15f/FLAG06f556904 [2019-11-24 04:55:05,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6fe14ca3/0e63c1d9028640549f95cc15ed79f15f [2019-11-24 04:55:05,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:55:05,839 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:55:05,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:55:05,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:55:05,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:55:05,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:55:05" (1/1) ... [2019-11-24 04:55:05,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12954213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:05, skipping insertion in model container [2019-11-24 04:55:05,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:55:05" (1/1) ... [2019-11-24 04:55:05,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:55:05,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:55:06,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:55:06,750 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:55:06,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:55:07,053 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:55:07,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07 WrapperNode [2019-11-24 04:55:07,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:55:07,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:55:07,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:55:07,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:55:07,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:55:07,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:55:07,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:55:07,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:55:07,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (1/1) ... [2019-11-24 04:55:07,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:55:07,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:55:07,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:55:07,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:55:07,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (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 04:55:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:55:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:55:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:55:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:55:07,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:55:16,965 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:55:16,966 INFO L284 CfgBuilder]: Removed 403 assume(true) statements. [2019-11-24 04:55:16,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:55:16 BoogieIcfgContainer [2019-11-24 04:55:16,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:55:16,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:55:16,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:55:16,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:55:16,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:55:05" (1/3) ... [2019-11-24 04:55:16,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dd1a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:55:16, skipping insertion in model container [2019-11-24 04:55:16,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:07" (2/3) ... [2019-11-24 04:55:16,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dd1a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:55:16, skipping insertion in model container [2019-11-24 04:55:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:55:16" (3/3) ... [2019-11-24 04:55:16,976 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec1_product33.cil.c [2019-11-24 04:55:16,985 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:55:16,993 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:55:17,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:55:17,023 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:55:17,023 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:55:17,023 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:55:17,023 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:55:17,023 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:55:17,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:55:17,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:55:17,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:55:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 04:55:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:55:17,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:17,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:17,044 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1415872303, now seen corresponding path program 1 times [2019-11-24 04:55:17,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:17,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888901978] [2019-11-24 04:55:17,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:17,358 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 04:55:17,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888901978] [2019-11-24 04:55:17,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:17,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:55:17,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331656590] [2019-11-24 04:55:17,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:55:17,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:55:17,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:55:17,383 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 04:55:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:17,408 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 04:55:17,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:55:17,411 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:55:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:17,426 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:55:17,426 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 04:55:17,431 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 04:55:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 04:55:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 04:55:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 04:55:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 04:55:17,480 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 04:55:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:17,480 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 04:55:17,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:55:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 04:55:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:55:17,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:17,482 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:17,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash -470542467, now seen corresponding path program 1 times [2019-11-24 04:55:17,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:17,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393228866] [2019-11-24 04:55:17,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:17,713 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 04:55:17,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393228866] [2019-11-24 04:55:17,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:17,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:55:17,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625063063] [2019-11-24 04:55:17,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:55:17,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:55:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:55:17,717 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 04:55:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:17,744 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 04:55:17,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:55:17,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:55:17,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:17,746 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:55:17,746 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 04:55:17,747 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 04:55:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 04:55:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 04:55:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 04:55:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 04:55:17,762 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 04:55:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:17,762 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 04:55:17,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:55:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 04:55:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:55:17,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:17,763 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:17,764 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash 314033815, now seen corresponding path program 1 times [2019-11-24 04:55:17,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:17,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507262004] [2019-11-24 04:55:17,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:17,932 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 04:55:17,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507262004] [2019-11-24 04:55:17,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:17,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:55:17,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073252097] [2019-11-24 04:55:17,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:55:17,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:55:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:55:17,937 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 04:55:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:17,958 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 04:55:17,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:55:17,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:55:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:17,961 INFO L225 Difference]: With dead ends: 45 [2019-11-24 04:55:17,961 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 04:55:17,962 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 04:55:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 04:55:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 04:55:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 04:55:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 04:55:17,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 04:55:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:17,968 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 04:55:17,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:55:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 04:55:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:55:17,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:17,970 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:17,970 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1671595083, now seen corresponding path program 1 times [2019-11-24 04:55:17,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:17,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492924706] [2019-11-24 04:55:17,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:18,407 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 04:55:18,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492924706] [2019-11-24 04:55:18,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:18,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:55:18,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636350812] [2019-11-24 04:55:18,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:55:18,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:18,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:55:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:55:18,412 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 04:55:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:18,794 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 04:55:18,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:55:18,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 04:55:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:18,800 INFO L225 Difference]: With dead ends: 68 [2019-11-24 04:55:18,801 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 04:55:18,801 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 04:55:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 04:55:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 04:55:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 04:55:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 04:55:18,816 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 04:55:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:18,816 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 04:55:18,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:55:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 04:55:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:55:18,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:18,821 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:18,821 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1914124322, now seen corresponding path program 1 times [2019-11-24 04:55:18,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:18,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112844643] [2019-11-24 04:55:18,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:18,901 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 04:55:18,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112844643] [2019-11-24 04:55:18,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:55:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469987715] [2019-11-24 04:55:18,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:55:18,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:55:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:55:18,903 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 04:55:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:18,946 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 04:55:18,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:55:18,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:55:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:18,950 INFO L225 Difference]: With dead ends: 168 [2019-11-24 04:55:18,953 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 04:55:18,954 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 04:55:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 04:55:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 04:55:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 04:55:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 04:55:18,978 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 04:55:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:18,978 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 04:55:18,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:55:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 04:55:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:55:18,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:18,980 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:18,980 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -373693243, now seen corresponding path program 1 times [2019-11-24 04:55:18,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:18,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624597211] [2019-11-24 04:55:18,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:19,295 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 04:55:19,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624597211] [2019-11-24 04:55:19,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823902736] [2019-11-24 04:55:19,296 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 04:55:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:19,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:55:19,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:55:19,708 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 04:55:19,708 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:55:19,736 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 04:55:19,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987739711] [2019-11-24 04:55:19,768 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:55:19,768 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:55:19,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:55:19,786 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:55:19,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:56:17,796 WARN L192 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 701 [2019-11-24 04:56:22,142 WARN L192 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 316 DAG size of output: 257 [2019-11-24 04:56:22,522 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-11-24 04:56:25,057 WARN L192 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:26,407 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:27,725 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:29,086 WARN L192 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:30,369 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:31,668 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:33,030 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:34,326 WARN L192 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:35,613 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 1114 [2019-11-24 04:56:37,572 WARN L192 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 1121 [2019-11-24 04:56:39,268 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 1121 [2019-11-24 04:56:40,951 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 1121 [2019-11-24 04:56:42,620 WARN L192 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 1121