./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/array-fpi/ifcompf.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 c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:42:20,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:42:20,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:42:20,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:42:20,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:42:20,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:42:20,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:42:20,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:42:20,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:42:20,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:42:20,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:42:20,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:42:20,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:42:20,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:42:20,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:42:20,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:42:20,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:42:20,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:42:20,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:42:20,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:42:20,902 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:42:20,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:42:20,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:42:20,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:42:20,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:42:20,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:42:20,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:42:20,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:42:20,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:42:20,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:42:20,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:42:20,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:42:20,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:42:20,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:42:20,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:42:20,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:42:20,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:42:20,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:42:20,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:42:20,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:42:20,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:42:20,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:42:20,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:42:20,954 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:42:20,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:42:20,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:42:20,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:42:20,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:42:20,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:42:20,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:42:20,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:42:20,957 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:42:20,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:42:20,958 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:42:20,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:42:20,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:42:20,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:42:20,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:42:20,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:42:20,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:42:20,960 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:42:20,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:42:20,960 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:42:20,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:42:20,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:42:20,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:42:20,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:42:20,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:42:20,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:42:20,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:42:20,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:42:20,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:42:20,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:42:20,963 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:42:20,964 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:42:20,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:42:20,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2022-07-22 10:42:21,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:42:21,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:42:21,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:42:21,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:42:21,263 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:42:21,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2022-07-22 10:42:21,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc1d23b34/2dd8681d69f74c3e9ed66dbbdf5417de/FLAG48e640f5b [2022-07-22 10:42:21,687 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:42:21,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2022-07-22 10:42:21,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc1d23b34/2dd8681d69f74c3e9ed66dbbdf5417de/FLAG48e640f5b [2022-07-22 10:42:21,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc1d23b34/2dd8681d69f74c3e9ed66dbbdf5417de [2022-07-22 10:42:21,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:42:21,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:42:21,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:42:21,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:42:21,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:42:21,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14158105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21, skipping insertion in model container [2022-07-22 10:42:21,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:42:21,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:42:21,863 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/array-fpi/ifcompf.c[590,603] [2022-07-22 10:42:21,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:42:21,890 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:42:21,900 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/array-fpi/ifcompf.c[590,603] [2022-07-22 10:42:21,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:42:21,921 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:42:21,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21 WrapperNode [2022-07-22 10:42:21,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:42:21,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:42:21,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:42:21,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:42:21,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,983 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-07-22 10:42:21,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:42:21,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:42:21,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:42:21,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:42:21,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:21,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:22,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:22,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:22,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:42:22,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:42:22,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:42:22,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:42:22,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (1/1) ... [2022-07-22 10:42:22,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:42:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:22,038 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) [2022-07-22 10:42:22,051 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 [2022-07-22 10:42:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:42:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:42:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:42:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 10:42:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:42:22,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:42:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:42:22,128 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:42:22,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:42:22,260 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:42:22,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:42:22,266 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 10:42:22,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:42:22 BoogieIcfgContainer [2022-07-22 10:42:22,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:42:22,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:42:22,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:42:22,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:42:22,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:42:21" (1/3) ... [2022-07-22 10:42:22,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6933da2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:42:22, skipping insertion in model container [2022-07-22 10:42:22,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:42:21" (2/3) ... [2022-07-22 10:42:22,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6933da2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:42:22, skipping insertion in model container [2022-07-22 10:42:22,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:42:22" (3/3) ... [2022-07-22 10:42:22,279 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2022-07-22 10:42:22,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:42:22,312 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:42:22,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:42:22,362 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@154ee08d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68da50e6 [2022-07-22 10:42:22,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:42:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 10:42:22,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:22,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:22,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2022-07-22 10:42:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:22,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882223537] [2022-07-22 10:42:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:42:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:42:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:22,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882223537] [2022-07-22 10:42:22,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882223537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:42:22,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:42:22,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:42:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694184924] [2022-07-22 10:42:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:42:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:42:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:42:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:42:22,540 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:22,553 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-07-22 10:42:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:42:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 10:42:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:22,562 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:42:22,562 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 10:42:22,565 INFO L412 NwaCegarLoop]: 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 [2022-07-22 10:42:22,568 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-22 10:42:22,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:42:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 10:42:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-22 10:42:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-22 10:42:22,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2022-07-22 10:42:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:22,598 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-22 10:42:22,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-22 10:42:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 10:42:22,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:22,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:22,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:42:22,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2022-07-22 10:42:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592247544] [2022-07-22 10:42:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:42:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:42:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592247544] [2022-07-22 10:42:22,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592247544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:42:22,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:42:22,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:42:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310044042] [2022-07-22 10:42:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:42:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:42:22,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:42:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:42:22,712 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:22,807 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-22 10:42:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:42:22,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 10:42:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:22,810 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:42:22,810 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 10:42:22,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:42:22,815 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:22,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:42:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 10:42:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-22 10:42:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-22 10:42:22,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2022-07-22 10:42:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:22,823 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-22 10:42:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-22 10:42:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 10:42:22,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:22,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:22,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:42:22,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2022-07-22 10:42:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731693324] [2022-07-22 10:42:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:22,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:22,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620354388] [2022-07-22 10:42:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:22,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:22,860 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) [2022-07-22 10:42:22,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:42:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:42:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 10:42:22,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:42:23,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:42:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:42:23,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:42:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731693324] [2022-07-22 10:42:23,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:42:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620354388] [2022-07-22 10:42:23,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620354388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:42:23,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:42:23,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 10:42:23,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851702811] [2022-07-22 10:42:23,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:42:23,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 10:42:23,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 10:42:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 10:42:23,200 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:23,251 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-07-22 10:42:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:42:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 10:42:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:23,252 INFO L225 Difference]: With dead ends: 37 [2022-07-22 10:42:23,252 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 10:42:23,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:42:23,254 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:23,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:42:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 10:42:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-07-22 10:42:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-07-22 10:42:23,260 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2022-07-22 10:42:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:23,260 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-07-22 10:42:23,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-07-22 10:42:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:42:23,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:23,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:23,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:23,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:23,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash -100913581, now seen corresponding path program 1 times [2022-07-22 10:42:23,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854188055] [2022-07-22 10:42:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:23,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:23,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732059850] [2022-07-22 10:42:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:23,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:42:23,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:42:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:42:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:42:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:42:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:42:23,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:42:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:42:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854188055] [2022-07-22 10:42:23,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:42:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732059850] [2022-07-22 10:42:23,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732059850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:42:23,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:42:23,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-22 10:42:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214369306] [2022-07-22 10:42:23,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:42:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:42:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:42:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:42:23,763 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:23,934 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-07-22 10:42:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 10:42:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 10:42:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:23,937 INFO L225 Difference]: With dead ends: 87 [2022-07-22 10:42:23,937 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 10:42:23,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:42:23,943 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:23,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:42:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 10:42:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2022-07-22 10:42:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-22 10:42:23,964 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-22 10:42:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:23,964 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-22 10:42:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-22 10:42:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 10:42:23,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:23,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 10:42:24,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2022-07-22 10:42:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:24,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124392623] [2022-07-22 10:42:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:24,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764506220] [2022-07-22 10:42:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:24,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:24,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:42:24,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:42:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:42:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 10:42:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:42:24,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-07-22 10:42:24,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:42:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:42:24,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 10:42:24,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-22 10:42:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:42:24,666 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 10:42:24,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-22 10:42:24,853 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 10:42:24,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2022-07-22 10:42:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:42:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:42:27,152 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_48|)) (forall ((v_ArrVal_128 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_48| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_128)))) (store .cse0 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))) is different from false [2022-07-22 10:42:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2022-07-22 10:42:27,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124392623] [2022-07-22 10:42:27,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:42:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764506220] [2022-07-22 10:42:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764506220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:42:27,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:42:27,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-22 10:42:27,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669507469] [2022-07-22 10:42:27,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:42:27,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:42:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:27,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:42:27,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=443, Unknown=1, NotChecked=44, Total=600 [2022-07-22 10:42:27,288 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:29,361 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_48|)) (forall ((v_ArrVal_128 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_48| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_128)))) (store .cse0 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) is different from false [2022-07-22 10:42:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:30,170 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-07-22 10:42:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:42:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-22 10:42:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:30,172 INFO L225 Difference]: With dead ends: 83 [2022-07-22 10:42:30,172 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 10:42:30,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=189, Invalid=809, Unknown=2, NotChecked=122, Total=1122 [2022-07-22 10:42:30,173 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:30,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-07-22 10:42:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 10:42:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2022-07-22 10:42:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-22 10:42:30,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 36 [2022-07-22 10:42:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:30,180 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-22 10:42:30,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-22 10:42:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 10:42:30,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:30,182 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:30,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:30,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1866238698, now seen corresponding path program 2 times [2022-07-22 10:42:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:30,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303754642] [2022-07-22 10:42:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:30,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:30,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66395229] [2022-07-22 10:42:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:42:30,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:30,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:42:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:42:30,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:42:30,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:42:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:42:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:42:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 10:42:30,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:42:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 10:42:30,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:30,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303754642] [2022-07-22 10:42:30,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:42:30,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66395229] [2022-07-22 10:42:30,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66395229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:42:30,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:42:30,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 10:42:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58898162] [2022-07-22 10:42:30,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:42:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 10:42:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 10:42:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:42:30,670 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:30,858 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-07-22 10:42:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:42:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-22 10:42:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:30,861 INFO L225 Difference]: With dead ends: 151 [2022-07-22 10:42:30,861 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 10:42:30,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-22 10:42:30,862 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:30,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 69 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:42:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 10:42:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2022-07-22 10:42:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-07-22 10:42:30,876 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2022-07-22 10:42:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:30,877 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-07-22 10:42:30,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-07-22 10:42:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 10:42:30,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:30,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:30,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:31,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:31,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash -175718331, now seen corresponding path program 3 times [2022-07-22 10:42:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:31,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207542721] [2022-07-22 10:42:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:31,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674944703] [2022-07-22 10:42:31,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:42:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:31,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:42:31,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:42:31,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 10:42:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:42:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:42:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:42:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 10:42:31,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:42:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 10:42:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:42:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207542721] [2022-07-22 10:42:31,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:42:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674944703] [2022-07-22 10:42:31,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674944703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:42:31,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:42:31,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 10:42:31,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082938169] [2022-07-22 10:42:31,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:42:31,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 10:42:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:42:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 10:42:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:42:31,400 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:42:31,583 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2022-07-22 10:42:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:42:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 10:42:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:42:31,584 INFO L225 Difference]: With dead ends: 121 [2022-07-22 10:42:31,584 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 10:42:31,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:42:31,585 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:42:31,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 46 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:42:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 10:42:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2022-07-22 10:42:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-22 10:42:31,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 48 [2022-07-22 10:42:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:42:31,591 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-22 10:42:31,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:42:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-22 10:42:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:42:31,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:42:31,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:42:31,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:31,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:31,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:42:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:42:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 4 times [2022-07-22 10:42:31,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:42:31,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76105688] [2022-07-22 10:42:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:42:31,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:42:31,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:42:31,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064853606] [2022-07-22 10:42:31,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:42:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:42:31,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:42:31,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:42:31,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:42:31,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-22 10:42:31,929 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 10:42:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 10:42:31,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 10:42:31,992 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 10:42:31,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 10:42:32,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:42:32,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:42:32,210 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-07-22 10:42:32,212 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 10:42:32,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 10:42:32 BoogieIcfgContainer [2022-07-22 10:42:32,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 10:42:32,254 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 10:42:32,254 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 10:42:32,254 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 10:42:32,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:42:22" (3/4) ... [2022-07-22 10:42:32,256 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 10:42:32,325 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 10:42:32,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 10:42:32,327 INFO L158 Benchmark]: Toolchain (without parser) took 10615.81ms. Allocated memory was 86.0MB in the beginning and 125.8MB in the end (delta: 39.8MB). Free memory was 53.8MB in the beginning and 69.1MB in the end (delta: -15.3MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,327 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 10:42:32,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.45ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 53.6MB in the beginning and 80.7MB in the end (delta: -27.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,328 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.41ms. Allocated memory is still 104.9MB. Free memory was 80.7MB in the beginning and 79.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 10:42:32,329 INFO L158 Benchmark]: Boogie Preprocessor took 19.92ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 77.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,330 INFO L158 Benchmark]: RCFGBuilder took 263.86ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 66.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,330 INFO L158 Benchmark]: TraceAbstraction took 9983.72ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.6MB in the beginning and 73.3MB in the end (delta: -7.7MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,330 INFO L158 Benchmark]: Witness Printer took 72.27ms. Allocated memory is still 125.8MB. Free memory was 73.3MB in the beginning and 69.1MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 10:42:32,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.45ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 53.6MB in the beginning and 80.7MB in the end (delta: -27.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.41ms. Allocated memory is still 104.9MB. Free memory was 80.7MB in the beginning and 79.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.92ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 77.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 263.86ms. Allocated memory is still 104.9MB. Free memory was 77.7MB in the beginning and 66.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9983.72ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.6MB in the beginning and 73.3MB in the end (delta: -7.7MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * Witness Printer took 72.27ms. Allocated memory is still 125.8MB. Free memory was 73.3MB in the beginning and 69.1MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [a={-1:0}, b={-2:0}, c={4:0}, i=0, N=3] [L32] COND TRUE i