/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_product35.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:55:07,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:55:07,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:55:07,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:55:07,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:55:07,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:55:07,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:55:07,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:55:07,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:55:07,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:55:07,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:55:07,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:55:07,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:55:07,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:55:07,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:55:07,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:55:07,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:55:07,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:55:07,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:55:07,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:55:07,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:55:07,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:55:07,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:55:07,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:55:07,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:55:07,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:55:07,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:55:07,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:55:07,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:55:07,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:55:07,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:55:07,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:55:07,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:55:07,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:55:07,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:55:07,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:55:07,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:55:07,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:55:07,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:55:07,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:55:07,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:55:07,677 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 04:55:07,704 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:55:07,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:55:07,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:55:07,706 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:55:07,706 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:55:07,706 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:55:07,706 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:55:07,706 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:55:07,707 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:55:07,707 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:55:07,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:55:07,708 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:55:07,709 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:55:07,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:55:07,709 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:55:07,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:55:07,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:55:07,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:55:07,713 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:55:07,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:55:07,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:55:07,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:55:07,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:55:07,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:55:07,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:55:07,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:55:07,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:55:07,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:55:07,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:55:07,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:55:07,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:55:07,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:55:07,717 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:55:07,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:55:07,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:55:07,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:55:07,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:55:07,993 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:55:07,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec1_product35.cil.c [2019-11-24 04:55:08,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41ab76ca/a17397b1cf2e4145b8fd0ea0d8a2bc19/FLAG72eb3018d [2019-11-24 04:55:08,699 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:55:08,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec1_product35.cil.c [2019-11-24 04:55:08,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41ab76ca/a17397b1cf2e4145b8fd0ea0d8a2bc19/FLAG72eb3018d [2019-11-24 04:55:08,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41ab76ca/a17397b1cf2e4145b8fd0ea0d8a2bc19 [2019-11-24 04:55:08,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:55:08,945 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:55:08,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:55:08,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:55:08,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:55:08,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:55:08" (1/1) ... [2019-11-24 04:55:08,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5fe691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:08, skipping insertion in model container [2019-11-24 04:55:08,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:55:08" (1/1) ... [2019-11-24 04:55:08,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:55:09,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:55:09,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:55:09,743 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:55:09,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:55:09,979 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:55:09,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09 WrapperNode [2019-11-24 04:55:09,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:55:09,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:55:09,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:55:09,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:55:09,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:55:10,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:55:10,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:55:10,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:55:10,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (1/1) ... [2019-11-24 04:55:10,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:55:10,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:55:10,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:55:10,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:55:10,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (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 04:55:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:55:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:55:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:55:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:55:10,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:55:34,374 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:55:34,375 INFO L284 CfgBuilder]: Removed 925 assume(true) statements. [2019-11-24 04:55:34,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:55:34 BoogieIcfgContainer [2019-11-24 04:55:34,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:55:34,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:55:34,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:55:34,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:55:34,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:55:08" (1/3) ... [2019-11-24 04:55:34,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fd3481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:55:34, skipping insertion in model container [2019-11-24 04:55:34,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:55:09" (2/3) ... [2019-11-24 04:55:34,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fd3481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:55:34, skipping insertion in model container [2019-11-24 04:55:34,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:55:34" (3/3) ... [2019-11-24 04:55:34,396 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec1_product35.cil.c [2019-11-24 04:55:34,411 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:55:34,422 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 04:55:34,438 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 04:55:34,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:55:34,471 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:55:34,471 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:55:34,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:55:34,472 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:55:34,472 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:55:34,472 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:55:34,472 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:55:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-24 04:55:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:55:34,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:34,506 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:34,507 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash 257518452, now seen corresponding path program 1 times [2019-11-24 04:55:34,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:34,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978097986] [2019-11-24 04:55:34,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:35,097 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 04:55:35,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978097986] [2019-11-24 04:55:35,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:35,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:55:35,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672631333] [2019-11-24 04:55:35,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:55:35,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:55:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:55:35,123 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2019-11-24 04:55:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:35,165 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2019-11-24 04:55:35,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:55:35,167 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 04:55:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:35,185 INFO L225 Difference]: With dead ends: 100 [2019-11-24 04:55:35,186 INFO L226 Difference]: Without dead ends: 59 [2019-11-24 04:55:35,191 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 04:55:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-24 04:55:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-24 04:55:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 04:55:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2019-11-24 04:55:35,257 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 8 [2019-11-24 04:55:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:35,257 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2019-11-24 04:55:35,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:55:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2019-11-24 04:55:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:55:35,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:35,259 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:35,260 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:35,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:35,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1474038819, now seen corresponding path program 1 times [2019-11-24 04:55:35,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:35,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250657751] [2019-11-24 04:55:35,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:35,439 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 04:55:35,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250657751] [2019-11-24 04:55:35,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:35,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:55:35,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999364802] [2019-11-24 04:55:35,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:55:35,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:55:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:55:35,445 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 3 states. [2019-11-24 04:55:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:35,471 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-11-24 04:55:35,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:55:35,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 04:55:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:35,475 INFO L225 Difference]: With dead ends: 94 [2019-11-24 04:55:35,476 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 04:55:35,478 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 04:55:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 04:55:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-24 04:55:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 04:55:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-11-24 04:55:35,500 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 9 [2019-11-24 04:55:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:35,501 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-11-24 04:55:35,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:55:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-11-24 04:55:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:55:35,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:35,502 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:35,503 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash -436484571, now seen corresponding path program 1 times [2019-11-24 04:55:35,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:35,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351049973] [2019-11-24 04:55:35,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:35,671 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 04:55:35,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351049973] [2019-11-24 04:55:35,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:35,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:55:35,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835541681] [2019-11-24 04:55:35,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:55:35,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:55:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:55:35,678 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 3 states. [2019-11-24 04:55:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:35,752 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2019-11-24 04:55:35,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:55:35,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:55:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:35,755 INFO L225 Difference]: With dead ends: 84 [2019-11-24 04:55:35,755 INFO L226 Difference]: Without dead ends: 55 [2019-11-24 04:55:35,756 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 04:55:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-24 04:55:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-24 04:55:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-24 04:55:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2019-11-24 04:55:35,766 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 13 [2019-11-24 04:55:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:35,768 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-24 04:55:35,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:55:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2019-11-24 04:55:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:55:35,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:35,770 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:35,770 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1628969761, now seen corresponding path program 1 times [2019-11-24 04:55:35,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:35,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463669903] [2019-11-24 04:55:35,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:36,017 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 04:55:36,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463669903] [2019-11-24 04:55:36,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:55:36,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:55:36,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386745939] [2019-11-24 04:55:36,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:55:36,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:55:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:55:36,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:55:36,021 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand 5 states. [2019-11-24 04:55:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:55:36,328 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2019-11-24 04:55:36,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:55:36,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-24 04:55:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:55:36,330 INFO L225 Difference]: With dead ends: 124 [2019-11-24 04:55:36,330 INFO L226 Difference]: Without dead ends: 101 [2019-11-24 04:55:36,331 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 04:55:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-24 04:55:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2019-11-24 04:55:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-24 04:55:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 129 transitions. [2019-11-24 04:55:36,341 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 129 transitions. Word has length 15 [2019-11-24 04:55:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:55:36,342 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 129 transitions. [2019-11-24 04:55:36,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:55:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 129 transitions. [2019-11-24 04:55:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:55:36,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:55:36,343 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:55:36,344 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:55:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:55:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -289179742, now seen corresponding path program 1 times [2019-11-24 04:55:36,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:55:36,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058756237] [2019-11-24 04:55:36,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:55:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:36,926 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 04:55:36,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058756237] [2019-11-24 04:55:36,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071779653] [2019-11-24 04:55:36,930 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 04:55:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:55:37,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:55:37,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:55:37,531 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 04:55:37,532 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:55:37,562 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 04:55:37,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92446540] [2019-11-24 04:55:37,587 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-24 04:55:37,588 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:55:37,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:55:37,599 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:55:37,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs