/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/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:59:35,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:59:35,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:59:35,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:59:35,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:59:35,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:59:35,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:59:35,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:59:35,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:59:35,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:59:35,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:59:35,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:59:35,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:59:35,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:59:35,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:59:35,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:59:35,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:59:35,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:59:35,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:59:35,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:59:35,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:59:35,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:59:35,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:59:35,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:59:35,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 03:59:35,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 03:59:35,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 03:59:35,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 03:59:35,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 03:59:35,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 03:59:35,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 03:59:35,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 03:59:35,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 03:59:35,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 03:59:35,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 03:59:35,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 03:59:35,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 03:59:35,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 03:59:35,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:59:35,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:59:35,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:59:35,447 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 03:59:35,478 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:59:35,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:59:35,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:59:35,480 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:59:35,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:59:35,480 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:59:35,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:59:35,481 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:59:35,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:59:35,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:59:35,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:59:35,482 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:59:35,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:59:35,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:59:35,484 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:59:35,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:59:35,485 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:59:35,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:59:35,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:59:35,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:59:35,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:59:35,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:59:35,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:59:35,486 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:59:35,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:59:35,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:59:35,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:59:35,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:59:35,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:59:35,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:59:35,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:59:35,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:59:35,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:59:35,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:59:35,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:59:35,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:59:35,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:59:35,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:59:35,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:59:35,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:59:35,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:59:35,766 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:59:35,767 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:59:35,768 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2019-11-24 03:59:35,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392a0e29e/0499e267a639439eb5ad833f1ddc09e3/FLAG35af0ce01 [2019-11-24 03:59:36,597 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:59:36,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2019-11-24 03:59:36,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392a0e29e/0499e267a639439eb5ad833f1ddc09e3/FLAG35af0ce01 [2019-11-24 03:59:36,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392a0e29e/0499e267a639439eb5ad833f1ddc09e3 [2019-11-24 03:59:36,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:59:36,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:59:36,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:59:36,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:59:36,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:59:36,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:59:36" (1/1) ... [2019-11-24 03:59:36,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44962956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:36, skipping insertion in model container [2019-11-24 03:59:36,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:59:36" (1/1) ... [2019-11-24 03:59:36,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:59:36,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:59:37,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:59:37,982 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:59:38,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:59:38,307 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:59:38,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38 WrapperNode [2019-11-24 03:59:38,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:59:38,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:59:38,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:59:38,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:59:38,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:59:38,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:59:38,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:59:38,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:59:38,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (1/1) ... [2019-11-24 03:59:38,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:59:38,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:59:38,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:59:38,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:59:38,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (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 03:59:38,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 03:59:38,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:59:38,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:59:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:59:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 03:59:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:59:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:59:38,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 03:59:38,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:59:38,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:59:43,593 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:59:43,593 INFO L284 CfgBuilder]: Removed 257 assume(true) statements. [2019-11-24 03:59:43,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:59:43 BoogieIcfgContainer [2019-11-24 03:59:43,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:59:43,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:59:43,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:59:43,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:59:43,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:59:36" (1/3) ... [2019-11-24 03:59:43,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e817d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:59:43, skipping insertion in model container [2019-11-24 03:59:43,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:59:38" (2/3) ... [2019-11-24 03:59:43,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e817d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:59:43, skipping insertion in model container [2019-11-24 03:59:43,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:59:43" (3/3) ... [2019-11-24 03:59:43,602 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2019-11-24 03:59:43,612 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:59:43,620 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 03:59:43,631 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 03:59:43,657 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:59:43,657 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:59:43,657 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:59:43,657 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:59:43,657 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:59:43,657 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:59:43,657 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:59:43,658 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:59:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2019-11-24 03:59:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 03:59:43,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:59:43,680 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:59:43,680 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:59:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:59:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -453015357, now seen corresponding path program 1 times [2019-11-24 03:59:43,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:59:43,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816364465] [2019-11-24 03:59:43,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:59:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:44,306 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 03:59:44,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816364465] [2019-11-24 03:59:44,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:59:44,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:59:44,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017977507] [2019-11-24 03:59:44,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:59:44,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:59:44,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:59:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:59:44,331 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 3 states. [2019-11-24 03:59:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:59:44,651 INFO L93 Difference]: Finished difference Result 231 states and 402 transitions. [2019-11-24 03:59:44,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:59:44,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 03:59:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:59:44,675 INFO L225 Difference]: With dead ends: 231 [2019-11-24 03:59:44,676 INFO L226 Difference]: Without dead ends: 133 [2019-11-24 03:59:44,681 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 03:59:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-24 03:59:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-11-24 03:59:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-24 03:59:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 226 transitions. [2019-11-24 03:59:44,737 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 226 transitions. Word has length 17 [2019-11-24 03:59:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:59:44,739 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 226 transitions. [2019-11-24 03:59:44,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:59:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 226 transitions. [2019-11-24 03:59:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 03:59:44,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:59:44,741 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:59:44,741 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:59:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:59:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 924553981, now seen corresponding path program 1 times [2019-11-24 03:59:44,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:59:44,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614123760] [2019-11-24 03:59:44,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:59:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:44,995 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 03:59:44,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614123760] [2019-11-24 03:59:44,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:59:44,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:59:44,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106905008] [2019-11-24 03:59:45,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:59:45,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:59:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:59:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:59:45,003 INFO L87 Difference]: Start difference. First operand 133 states and 226 transitions. Second operand 3 states. [2019-11-24 03:59:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:59:45,069 INFO L93 Difference]: Finished difference Result 216 states and 370 transitions. [2019-11-24 03:59:45,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:59:45,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 03:59:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:59:45,076 INFO L225 Difference]: With dead ends: 216 [2019-11-24 03:59:45,076 INFO L226 Difference]: Without dead ends: 213 [2019-11-24 03:59:45,077 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 03:59:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-24 03:59:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2019-11-24 03:59:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-24 03:59:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 366 transitions. [2019-11-24 03:59:45,123 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 366 transitions. Word has length 21 [2019-11-24 03:59:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:59:45,124 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 366 transitions. [2019-11-24 03:59:45,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:59:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 366 transitions. [2019-11-24 03:59:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-24 03:59:45,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:59:45,130 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:59:45,131 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:59:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:59:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1254055449, now seen corresponding path program 1 times [2019-11-24 03:59:45,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:59:45,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59187389] [2019-11-24 03:59:45,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:59:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:45,352 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 03:59:45,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59187389] [2019-11-24 03:59:45,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:59:45,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:59:45,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966619068] [2019-11-24 03:59:45,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:59:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:59:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:59:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:59:45,355 INFO L87 Difference]: Start difference. First operand 213 states and 366 transitions. Second operand 3 states. [2019-11-24 03:59:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:59:45,503 INFO L93 Difference]: Finished difference Result 507 states and 866 transitions. [2019-11-24 03:59:45,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:59:45,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-24 03:59:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:59:45,506 INFO L225 Difference]: With dead ends: 507 [2019-11-24 03:59:45,506 INFO L226 Difference]: Without dead ends: 306 [2019-11-24 03:59:45,509 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 03:59:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-11-24 03:59:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2019-11-24 03:59:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2019-11-24 03:59:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 514 transitions. [2019-11-24 03:59:45,555 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 514 transitions. Word has length 29 [2019-11-24 03:59:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:59:45,555 INFO L462 AbstractCegarLoop]: Abstraction has 303 states and 514 transitions. [2019-11-24 03:59:45,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:59:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 514 transitions. [2019-11-24 03:59:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-24 03:59:45,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:59:45,559 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:59:45,559 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:59:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:59:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1307596077, now seen corresponding path program 1 times [2019-11-24 03:59:45,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:59:45,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844008738] [2019-11-24 03:59:45,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:59:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 03:59:45,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844008738] [2019-11-24 03:59:45,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:59:45,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:59:45,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418765291] [2019-11-24 03:59:45,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:59:45,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:59:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:59:45,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:59:45,817 INFO L87 Difference]: Start difference. First operand 303 states and 514 transitions. Second operand 3 states. [2019-11-24 03:59:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:59:45,847 INFO L93 Difference]: Finished difference Result 597 states and 1014 transitions. [2019-11-24 03:59:45,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:59:45,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-11-24 03:59:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:59:45,849 INFO L225 Difference]: With dead ends: 597 [2019-11-24 03:59:45,849 INFO L226 Difference]: Without dead ends: 305 [2019-11-24 03:59:45,855 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 03:59:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-11-24 03:59:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2019-11-24 03:59:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-11-24 03:59:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 516 transitions. [2019-11-24 03:59:45,873 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 516 transitions. Word has length 42 [2019-11-24 03:59:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:59:45,873 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 516 transitions. [2019-11-24 03:59:45,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:59:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 516 transitions. [2019-11-24 03:59:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-24 03:59:45,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:59:45,883 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:59:45,884 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:59:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:59:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 263934131, now seen corresponding path program 1 times [2019-11-24 03:59:45,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:59:45,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340118963] [2019-11-24 03:59:45,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:59:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:59:46,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340118963] [2019-11-24 03:59:46,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644886163] [2019-11-24 03:59:46,091 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 03:59:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:59:46,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 03:59:46,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:59:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:59:46,815 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:59:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 03:59:46,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795171946] [2019-11-24 03:59:46,899 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2019-11-24 03:59:46,900 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:59:46,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:59:46,916 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:59:46,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:00:30,196 WARN L192 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 3905 [2019-11-24 04:00:45,553 WARN L192 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 317 DAG size of output: 257 [2019-11-24 04:00:48,001 WARN L192 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 3957