./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/stateful_check.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:06:08,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:06:08,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:06:08,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:06:08,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:06:08,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:06:08,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:06:08,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:06:08,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:06:08,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:06:08,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:06:08,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:06:08,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:06:08,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:06:08,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:06:08,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:06:08,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:06:08,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:06:08,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:06:08,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:06:08,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:06:08,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:06:08,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:06:08,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:06:08,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:06:08,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:06:08,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:06:08,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:06:08,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:06:08,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:06:08,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:06:08,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:06:08,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:06:08,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:06:08,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:06:08,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:06:08,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:06:08,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:06:08,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:06:08,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:06:08,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:06:08,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:06:08,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:06:08,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:06:08,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:06:08,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:06:08,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:06:08,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:06:08,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:06:08,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:06:08,919 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:06:08,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:06:08,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:06:08,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:06:08,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:06:08,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:06:08,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:06:08,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:06:08,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:06:08,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:06:08,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:06:08,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:06:08,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:06:08,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:06:08,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:06:08,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86e7865b5c88aae342720e4dde014f366638a0b48b0e0f6e55acb2c675bcac3e [2021-12-21 12:06:09,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:06:09,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:06:09,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:06:09,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:06:09,152 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:06:09,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/stateful_check.c [2021-12-21 12:06:09,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743e45db3/cd31d8839e104a86b4aed3aafe3977ac/FLAGe9a6102a8 [2021-12-21 12:06:09,535 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:06:09,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c [2021-12-21 12:06:09,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743e45db3/cd31d8839e104a86b4aed3aafe3977ac/FLAGe9a6102a8 [2021-12-21 12:06:09,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/743e45db3/cd31d8839e104a86b4aed3aafe3977ac [2021-12-21 12:06:09,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:06:09,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:06:09,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:06:09,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:06:09,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:06:09,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:06:09" (1/1) ... [2021-12-21 12:06:09,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56414cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:09, skipping insertion in model container [2021-12-21 12:06:09,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:06:09" (1/1) ... [2021-12-21 12:06:09,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:06:09,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:06:10,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2021-12-21 12:06:10,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:06:10,238 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:06:10,253 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2021-12-21 12:06:10,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:06:10,286 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:06:10,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10 WrapperNode [2021-12-21 12:06:10,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:06:10,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:06:10,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:06:10,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:06:10,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,325 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 100 [2021-12-21 12:06:10,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:06:10,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:06:10,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:06:10,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:06:10,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:06:10,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:06:10,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:06:10,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:06:10,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (1/1) ... [2021-12-21 12:06:10,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:06:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:06:10,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:06:10,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:06:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:06:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-12-21 12:06:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-12-21 12:06:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:06:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-21 12:06:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-21 12:06:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:06:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:06:10,540 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:06:10,542 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:06:10,743 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:06:10,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:06:10,749 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:06:10,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:10 BoogieIcfgContainer [2021-12-21 12:06:10,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:06:10,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:06:10,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:06:10,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:06:10,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:06:09" (1/3) ... [2021-12-21 12:06:10,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4c552d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:06:10, skipping insertion in model container [2021-12-21 12:06:10,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:10" (2/3) ... [2021-12-21 12:06:10,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4c552d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:06:10, skipping insertion in model container [2021-12-21 12:06:10,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:10" (3/3) ... [2021-12-21 12:06:10,758 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2021-12-21 12:06:10,763 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:06:10,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:06:10,801 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:06:10,806 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:06:10,807 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:06:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 41 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:06:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:06:10,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:10,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:10,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2032519849, now seen corresponding path program 1 times [2021-12-21 12:06:10,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:10,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246476558] [2021-12-21 12:06:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:10,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:06:10,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246476558] [2021-12-21 12:06:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246476558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:06:10,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:06:10,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:06:10,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980650487] [2021-12-21 12:06:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:06:10,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:06:10,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:06:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:06:11,013 INFO L87 Difference]: Start difference. First operand has 46 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 41 states have internal predecessors, (53), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:06:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:11,034 INFO L93 Difference]: Finished difference Result 87 states and 129 transitions. [2021-12-21 12:06:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:06:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 12:06:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:11,042 INFO L225 Difference]: With dead ends: 87 [2021-12-21 12:06:11,042 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 12:06:11,045 INFO L932 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 [2021-12-21 12:06:11,048 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:11,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:06:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 12:06:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-21 12:06:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.4375) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:06:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2021-12-21 12:06:11,086 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 8 [2021-12-21 12:06:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:11,086 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2021-12-21 12:06:11,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:06:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2021-12-21 12:06:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:06:11,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:11,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:11,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:06:11,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash 160489557, now seen corresponding path program 1 times [2021-12-21 12:06:11,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134179788] [2021-12-21 12:06:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:11,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:06:11,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:11,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134179788] [2021-12-21 12:06:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134179788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:06:11,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:06:11,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:06:11,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351704621] [2021-12-21 12:06:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:06:11,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:06:11,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:06:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:06:11,125 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:06:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:11,149 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2021-12-21 12:06:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:06:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 12:06:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:11,152 INFO L225 Difference]: With dead ends: 68 [2021-12-21 12:06:11,152 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 12:06:11,152 INFO L932 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 [2021-12-21 12:06:11,153 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 33 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:11,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 102 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:06:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 12:06:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-21 12:06:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 55 states have internal predecessors, (77), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 12:06:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 90 transitions. [2021-12-21 12:06:11,163 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 90 transitions. Word has length 9 [2021-12-21 12:06:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:11,163 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 90 transitions. [2021-12-21 12:06:11,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:06:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 90 transitions. [2021-12-21 12:06:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 12:06:11,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:11,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:11,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:06:11,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1852157628, now seen corresponding path program 1 times [2021-12-21 12:06:11,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:11,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140162368] [2021-12-21 12:06:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:11,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 12:06:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:06:11,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140162368] [2021-12-21 12:06:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140162368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:06:11,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:06:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:06:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228309379] [2021-12-21 12:06:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:06:11,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:06:11,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:06:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:06:11,249 INFO L87 Difference]: Start difference. First operand 62 states and 90 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:06:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:11,308 INFO L93 Difference]: Finished difference Result 148 states and 223 transitions. [2021-12-21 12:06:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:06:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-21 12:06:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:11,310 INFO L225 Difference]: With dead ends: 148 [2021-12-21 12:06:11,310 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 12:06:11,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:06:11,312 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:11,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:06:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 12:06:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-12-21 12:06:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 79 states have internal predecessors, (112), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 12:06:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 125 transitions. [2021-12-21 12:06:11,322 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 125 transitions. Word has length 20 [2021-12-21 12:06:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:11,322 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 125 transitions. [2021-12-21 12:06:11,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:06:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 125 transitions. [2021-12-21 12:06:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 12:06:11,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:11,324 INFO L514 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] [2021-12-21 12:06:11,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:06:11,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:11,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1007794771, now seen corresponding path program 1 times [2021-12-21 12:06:11,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:11,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21032548] [2021-12-21 12:06:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:11,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:06:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:06:11,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:11,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21032548] [2021-12-21 12:06:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21032548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:06:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237138471] [2021-12-21 12:06:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:11,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:06:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:06:11,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:06:11,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:06:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:06:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:06:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:06:11,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:06:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:06:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237138471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:06:11,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:06:11,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2021-12-21 12:06:11,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14346712] [2021-12-21 12:06:11,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:06:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:06:11,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:06:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:06:11,672 INFO L87 Difference]: Start difference. First operand 86 states and 125 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:06:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:11,744 INFO L93 Difference]: Finished difference Result 253 states and 388 transitions. [2021-12-21 12:06:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:06:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-21 12:06:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:11,746 INFO L225 Difference]: With dead ends: 253 [2021-12-21 12:06:11,746 INFO L226 Difference]: Without dead ends: 170 [2021-12-21 12:06:11,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:06:11,748 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 96 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:11,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 173 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:06:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-21 12:06:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 158. [2021-12-21 12:06:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.5472972972972974) internal successors, (229), 151 states have internal predecessors, (229), 8 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 12:06:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 242 transitions. [2021-12-21 12:06:11,763 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 242 transitions. Word has length 27 [2021-12-21 12:06:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:11,763 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 242 transitions. [2021-12-21 12:06:11,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 12:06:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 242 transitions. [2021-12-21 12:06:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 12:06:11,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:11,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-12-21 12:06:11,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:06:11,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:06:11,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1977818999, now seen corresponding path program 1 times [2021-12-21 12:06:11,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:11,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642749732] [2021-12-21 12:06:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:06:12,018 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:06:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:06:12,064 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:06:12,064 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:06:12,065 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:06:12,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 12:06:12,069 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-21 12:06:12,072 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:06:12,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:06:12 BoogieIcfgContainer [2021-12-21 12:06:12,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:06:12,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:06:12,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:06:12,127 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:06:12,127 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:10" (3/4) ... [2021-12-21 12:06:12,129 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 12:06:12,200 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:06:12,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:06:12,201 INFO L158 Benchmark]: Toolchain (without parser) took 2234.33ms. Allocated memory is still 113.2MB. Free memory was 79.7MB in the beginning and 55.1MB in the end (delta: 24.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,201 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 84.0MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:06:12,201 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.90ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 89.4MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,201 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.11ms. Allocated memory is still 113.2MB. Free memory was 89.4MB in the beginning and 87.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,202 INFO L158 Benchmark]: Boogie Preprocessor took 36.22ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 86.7MB in the end (delta: 934.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,202 INFO L158 Benchmark]: RCFGBuilder took 387.86ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 75.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,202 INFO L158 Benchmark]: TraceAbstraction took 1373.46ms. Allocated memory is still 113.2MB. Free memory was 74.7MB in the beginning and 58.5MB in the end (delta: 16.2MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,202 INFO L158 Benchmark]: Witness Printer took 74.30ms. Allocated memory is still 113.2MB. Free memory was 58.5MB in the beginning and 55.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:06:12,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 84.0MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.90ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 89.4MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.11ms. Allocated memory is still 113.2MB. Free memory was 89.4MB in the beginning and 87.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.22ms. Allocated memory is still 113.2MB. Free memory was 87.7MB in the beginning and 86.7MB in the end (delta: 934.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.86ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 75.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1373.46ms. Allocated memory is still 113.2MB. Free memory was 74.7MB in the beginning and 58.5MB in the end (delta: 16.2MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Witness Printer took 74.30ms. Allocated memory is still 113.2MB. Free memory was 58.5MB in the beginning and 55.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; VAL [ldv_mutex=1, open_called=0] [L76] int ldv_s_misc_fops_file_operations = 0; [L77] CALL my_init() [L71] open_called = 0 [L72] return 0; VAL [\result=0, ldv_mutex=1, open_called=0] [L77] RET my_init() [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: VAL [__VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=0, open_called=0] [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L84] CALL misc_open() [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; VAL [\result=1, ldv_mutex=1, open_called=0] [L84] RET misc_open() [L85] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=0, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: VAL [__VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=1, open_called=0] [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L92] CALL misc_read() [L54] return 0; VAL [\result=0, ldv_mutex=1, open_called=0] [L92] RET misc_read() [L93] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=1, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: VAL [__VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=2, open_called=0] [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L100] CALL misc_llseek() [L50] return 0; VAL [\result=0, ldv_mutex=1, open_called=0] [L100] RET misc_llseek() [L101] ldv_s_misc_fops_file_operations++ VAL [__VERIFIER_nondet_int()=2, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [__VERIFIER_nondet_int()=3, ldv_mutex=1, ldv_s_misc_fops_file_operations=3, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L108] CALL misc_release() [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L43] CALL mutex_lock() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=1, ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [\old(ldv_mutex)=1, ldv_mutex=2, open_called=0] [L43] RET mutex_lock() VAL [ldv_mutex=2, open_called=0] [L44] CALL mutex_lock() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L18] CALL __blast_assert() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] [L6] reach_error() VAL [\old(ldv_mutex)=2, ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 148 mSDsluCounter, 453 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 247 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 98 IncrementalHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 206 mSDtfsCounter, 98 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 242 SizeOfPredicates, 0 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 4/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-21 12:06:12,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE