/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-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 03:58:17,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 03:58:17,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 03:58:17,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 03:58:17,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 03:58:17,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 03:58:17,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 03:58:17,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 03:58:17,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 03:58:17,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 03:58:17,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 03:58:17,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 03:58:17,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 03:58:17,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 03:58:17,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 03:58:17,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 03:58:17,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 03:58:17,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 03:58:17,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 03:58:17,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 03:58:17,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 03:58:17,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 03:58:17,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 03:58:17,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 03:58:17,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 03:58:17,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 03:58:17,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 03:58:17,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 03:58:17,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 03:58:17,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 03:58:17,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 03:58:17,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 03:58:17,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 03:58:17,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 03:58:17,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 03:58:17,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 03:58:17,928 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 03:58:17,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 03:58:17,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 03:58:17,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 03:58:17,963 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 03:58:17,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 03:58:17,967 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 03:58:17,967 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 03:58:17,967 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 03:58:17,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 03:58:17,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 03:58:17,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 03:58:17,968 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 03:58:17,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 03:58:17,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 03:58:17,968 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 03:58:17,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 03:58:17,969 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 03:58:17,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 03:58:17,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 03:58:17,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 03:58:17,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 03:58:17,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 03:58:17,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 03:58:17,972 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 03:58:17,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 03:58:17,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 03:58:17,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 03:58:17,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 03:58:17,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 03:58:17,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 03:58:17,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 03:58:17,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 03:58:17,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 03:58:17,974 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 03:58:17,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 03:58:17,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 03:58:17,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 03:58:17,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 03:58:18,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 03:58:18,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 03:58:18,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 03:58:18,318 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 03:58:18,319 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 03:58:18,319 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2019-11-24 03:58:18,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b85104a6/0e79b1f937b5421c97f155752a2e381f/FLAG72921cdc1 [2019-11-24 03:58:19,199 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 03:58:19,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-validator-v0.6/linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2019-11-24 03:58:19,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b85104a6/0e79b1f937b5421c97f155752a2e381f/FLAG72921cdc1 [2019-11-24 03:58:19,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b85104a6/0e79b1f937b5421c97f155752a2e381f [2019-11-24 03:58:19,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 03:58:19,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 03:58:19,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 03:58:19,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 03:58:19,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 03:58:19,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:58:19" (1/1) ... [2019-11-24 03:58:19,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323130ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:19, skipping insertion in model container [2019-11-24 03:58:19,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 03:58:19" (1/1) ... [2019-11-24 03:58:19,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 03:58:19,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 03:58:21,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:58:21,150 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 03:58:21,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 03:58:21,627 INFO L208 MainTranslator]: Completed translation [2019-11-24 03:58:21,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21 WrapperNode [2019-11-24 03:58:21,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 03:58:21,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 03:58:21,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 03:58:21,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 03:58:21,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 03:58:21,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 03:58:21,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 03:58:21,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 03:58:21,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:21,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:22,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (1/1) ... [2019-11-24 03:58:22,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 03:58:22,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 03:58:22,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 03:58:22,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 03:58:22,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (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 03:58:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 03:58:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 03:58:22,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 03:58:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2019-11-24 03:58:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 03:58:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 03:58:22,119 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2019-11-24 03:58:22,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2019-11-24 03:58:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure virtblk_remove [2019-11-24 03:58:22,120 INFO L138 BoogieDeclarations]: Found implementation of procedure virtblk_remove [2019-11-24 03:58:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 03:58:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 03:58:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 03:58:22,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 03:58:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 03:58:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 03:58:35,592 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 03:58:35,592 INFO L284 CfgBuilder]: Removed 487 assume(true) statements. [2019-11-24 03:58:35,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:58:35 BoogieIcfgContainer [2019-11-24 03:58:35,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 03:58:35,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 03:58:35,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 03:58:35,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 03:58:35,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 03:58:19" (1/3) ... [2019-11-24 03:58:35,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626acaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:58:35, skipping insertion in model container [2019-11-24 03:58:35,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 03:58:21" (2/3) ... [2019-11-24 03:58:35,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626acaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 03:58:35, skipping insertion in model container [2019-11-24 03:58:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 03:58:35" (3/3) ... [2019-11-24 03:58:35,601 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-stable-39a1d13-1-101_1a-drivers--block--virtio_blk.ko-entry_point.cil.out.i [2019-11-24 03:58:35,611 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 03:58:35,619 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 03:58:35,628 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 03:58:35,653 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 03:58:35,653 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 03:58:35,653 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 03:58:35,653 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 03:58:35,653 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 03:58:35,653 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 03:58:35,653 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 03:58:35,654 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 03:58:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2019-11-24 03:58:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 03:58:35,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:58:35,680 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:58:35,680 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:58:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:58:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1105663837, now seen corresponding path program 1 times [2019-11-24 03:58:35,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:58:35,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153091779] [2019-11-24 03:58:35,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:58:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:36,088 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 03:58:36,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153091779] [2019-11-24 03:58:36,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:58:36,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:58:36,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480795901] [2019-11-24 03:58:36,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:58:36,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:58:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:58:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:58:36,121 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 3 states. [2019-11-24 03:58:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:58:36,262 INFO L93 Difference]: Finished difference Result 410 states and 634 transitions. [2019-11-24 03:58:36,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:58:36,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 03:58:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:58:36,296 INFO L225 Difference]: With dead ends: 410 [2019-11-24 03:58:36,297 INFO L226 Difference]: Without dead ends: 213 [2019-11-24 03:58:36,310 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 03:58:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-24 03:58:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2019-11-24 03:58:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-11-24 03:58:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2019-11-24 03:58:36,422 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 12 [2019-11-24 03:58:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:58:36,422 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2019-11-24 03:58:36,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:58:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2019-11-24 03:58:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 03:58:36,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:58:36,424 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 03:58:36,425 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:58:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:58:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 278407053, now seen corresponding path program 1 times [2019-11-24 03:58:36,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:58:36,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116837363] [2019-11-24 03:58:36,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:58:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:36,583 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 03:58:36,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116837363] [2019-11-24 03:58:36,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:58:36,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 03:58:36,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246954259] [2019-11-24 03:58:36,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:58:36,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:58:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:58:36,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:58:36,586 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand 3 states. [2019-11-24 03:58:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:58:36,625 INFO L93 Difference]: Finished difference Result 413 states and 588 transitions. [2019-11-24 03:58:36,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:58:36,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 03:58:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:58:36,630 INFO L225 Difference]: With dead ends: 413 [2019-11-24 03:58:36,630 INFO L226 Difference]: Without dead ends: 408 [2019-11-24 03:58:36,631 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 03:58:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-11-24 03:58:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2019-11-24 03:58:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2019-11-24 03:58:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 580 transitions. [2019-11-24 03:58:36,672 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 580 transitions. Word has length 15 [2019-11-24 03:58:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:58:36,673 INFO L462 AbstractCegarLoop]: Abstraction has 408 states and 580 transitions. [2019-11-24 03:58:36,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:58:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 580 transitions. [2019-11-24 03:58:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-24 03:58:36,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:58:36,677 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-24 03:58:36,677 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:58:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:58:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash -740075062, now seen corresponding path program 1 times [2019-11-24 03:58:36,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:58:36,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785365541] [2019-11-24 03:58:36,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:58:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 03:58:36,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785365541] [2019-11-24 03:58:36,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:58:36,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:58:36,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545502920] [2019-11-24 03:58:36,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:58:36,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:58:36,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:58:36,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:58:36,773 INFO L87 Difference]: Start difference. First operand 408 states and 580 transitions. Second operand 3 states. [2019-11-24 03:58:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:58:36,874 INFO L93 Difference]: Finished difference Result 1158 states and 1638 transitions. [2019-11-24 03:58:36,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:58:36,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-24 03:58:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:58:36,881 INFO L225 Difference]: With dead ends: 1158 [2019-11-24 03:58:36,881 INFO L226 Difference]: Without dead ends: 755 [2019-11-24 03:58:36,883 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 03:58:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-11-24 03:58:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2019-11-24 03:58:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-24 03:58:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1060 transitions. [2019-11-24 03:58:36,938 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1060 transitions. Word has length 29 [2019-11-24 03:58:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:58:36,938 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1060 transitions. [2019-11-24 03:58:36,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:58:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1060 transitions. [2019-11-24 03:58:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 03:58:36,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:58:36,944 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 03:58:36,944 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:58:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:58:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 760640508, now seen corresponding path program 1 times [2019-11-24 03:58:36,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:58:36,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583767815] [2019-11-24 03:58:36,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:58:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:58:37,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583767815] [2019-11-24 03:58:37,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 03:58:37,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 03:58:37,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622500789] [2019-11-24 03:58:37,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 03:58:37,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 03:58:37,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 03:58:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 03:58:37,154 INFO L87 Difference]: Start difference. First operand 752 states and 1060 transitions. Second operand 3 states. [2019-11-24 03:58:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 03:58:37,192 INFO L93 Difference]: Finished difference Result 1500 states and 2114 transitions. [2019-11-24 03:58:37,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 03:58:37,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 03:58:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 03:58:37,199 INFO L225 Difference]: With dead ends: 1500 [2019-11-24 03:58:37,199 INFO L226 Difference]: Without dead ends: 753 [2019-11-24 03:58:37,202 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 03:58:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-11-24 03:58:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2019-11-24 03:58:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-11-24 03:58:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1061 transitions. [2019-11-24 03:58:37,244 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1061 transitions. Word has length 39 [2019-11-24 03:58:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 03:58:37,245 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1061 transitions. [2019-11-24 03:58:37,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 03:58:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1061 transitions. [2019-11-24 03:58:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-24 03:58:37,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 03:58:37,251 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-24 03:58:37,251 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 03:58:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 03:58:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1032975472, now seen corresponding path program 1 times [2019-11-24 03:58:37,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 03:58:37,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636318218] [2019-11-24 03:58:37,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 03:58:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:58:37,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636318218] [2019-11-24 03:58:37,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644945122] [2019-11-24 03:58:37,452 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 03:58:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 03:58:38,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 03:58:38,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 03:58:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:58:38,058 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 03:58:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-24 03:58:38,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244268638] [2019-11-24 03:58:38,133 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2019-11-24 03:58:38,133 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 03:58:38,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 03:58:38,146 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 03:58:38,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 03:58:39,231 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 495 [2019-11-24 03:58:39,765 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 484 [2019-11-24 03:58:40,186 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 527 [2019-11-24 03:58:40,783 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 525 [2019-11-24 03:58:41,156 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 523 [2019-11-24 03:58:41,618 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 526 [2019-11-24 03:58:42,440 WARN L192 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 630 [2019-11-24 03:58:45,413 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 644 [2019-11-24 03:58:48,326 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 642 [2019-11-24 03:58:50,570 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2019-11-24 03:58:51,114 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 647 [2019-11-24 03:58:51,867 WARN L192 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 648 [2019-11-24 03:58:58,169 WARN L192 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 660 [2019-11-24 03:59:05,692 WARN L192 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 658 [2019-11-24 03:59:11,754 WARN L192 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 656 [2019-11-24 03:59:12,584 WARN L192 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 664 [2019-11-24 03:59:13,606 WARN L192 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 664 DAG size of output: 664 [2019-11-24 03:59:27,754 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 676 [2019-11-24 03:59:40,844 WARN L192 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 674