./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_dekker.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/seq-pthread/cs_dekker.i -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 ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 18:43:21,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 18:43:21,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 18:43:21,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 18:43:21,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 18:43:21,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 18:43:21,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 18:43:21,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 18:43:21,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 18:43:21,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 18:43:21,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 18:43:21,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 18:43:21,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 18:43:21,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 18:43:21,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 18:43:21,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 18:43:21,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 18:43:21,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 18:43:21,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 18:43:21,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 18:43:21,112 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 18:43:21,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 18:43:21,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 18:43:21,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 18:43:21,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 18:43:21,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 18:43:21,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 18:43:21,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 18:43:21,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 18:43:21,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 18:43:21,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 18:43:21,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 18:43:21,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 18:43:21,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 18:43:21,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 18:43:21,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 18:43:21,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 18:43:21,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 18:43:21,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 18:43:21,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 18:43:21,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 18:43:21,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 18:43:21,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 18:43:21,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 18:43:21,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 18:43:21,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 18:43:21,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 18:43:21,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 18:43:21,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 18:43:21,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 18:43:21,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 18:43:21,155 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 18:43:21,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 18:43:21,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 18:43:21,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 18:43:21,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 18:43:21,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 18:43:21,158 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 18:43:21,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 18:43:21,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 18:43:21,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 18:43:21,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 18:43:21,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:43:21,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 18:43:21,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 18:43:21,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 18:43:21,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 [2022-07-19 18:43:21,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 18:43:21,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 18:43:21,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 18:43:21,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 18:43:21,383 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 18:43:21,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_dekker.i [2022-07-19 18:43:21,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81361a6a/fc4f4009452a49d6b9f49cd7ecc6bc28/FLAGf8bed66f3 [2022-07-19 18:43:21,890 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 18:43:21,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_dekker.i [2022-07-19 18:43:21,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81361a6a/fc4f4009452a49d6b9f49cd7ecc6bc28/FLAGf8bed66f3 [2022-07-19 18:43:22,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c81361a6a/fc4f4009452a49d6b9f49cd7ecc6bc28 [2022-07-19 18:43:22,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 18:43:22,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 18:43:22,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 18:43:22,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 18:43:22,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 18:43:22,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:22,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c88c55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22, skipping insertion in model container [2022-07-19 18:43:22,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:22,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 18:43:22,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 18:43:22,586 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/seq-pthread/cs_dekker.i[23603,23616] [2022-07-19 18:43:22,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:43:22,778 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 18:43:22,821 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/seq-pthread/cs_dekker.i[23603,23616] [2022-07-19 18:43:22,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:43:22,904 INFO L208 MainTranslator]: Completed translation [2022-07-19 18:43:22,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22 WrapperNode [2022-07-19 18:43:22,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 18:43:22,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 18:43:22,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 18:43:22,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 18:43:22,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:22,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:22,987 INFO L137 Inliner]: procedures = 145, calls = 300, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 448 [2022-07-19 18:43:22,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 18:43:22,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 18:43:22,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 18:43:22,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 18:43:22,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:22,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 18:43:23,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 18:43:23,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 18:43:23,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 18:43:23,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (1/1) ... [2022-07-19 18:43:23,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:43:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:43:23,085 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) [2022-07-19 18:43:23,100 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 [2022-07-19 18:43:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 18:43:23,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 18:43:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 18:43:23,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 18:43:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 18:43:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 18:43:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 18:43:23,117 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-07-19 18:43:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2022-07-19 18:43:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-19 18:43:23,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 18:43:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-07-19 18:43:23,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-07-19 18:43:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 18:43:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 18:43:23,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 18:43:23,222 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 18:43:23,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 18:43:25,776 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 18:43:25,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 18:43:25,782 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 18:43:25,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:43:25 BoogieIcfgContainer [2022-07-19 18:43:25,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 18:43:25,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 18:43:25,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 18:43:25,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 18:43:25,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 06:43:22" (1/3) ... [2022-07-19 18:43:25,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2798f253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:43:25, skipping insertion in model container [2022-07-19 18:43:25,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:43:22" (2/3) ... [2022-07-19 18:43:25,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2798f253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:43:25, skipping insertion in model container [2022-07-19 18:43:25,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:43:25" (3/3) ... [2022-07-19 18:43:25,789 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_dekker.i [2022-07-19 18:43:25,799 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 18:43:25,800 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 18:43:25,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 18:43:25,837 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@db1409c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@397fc50 [2022-07-19 18:43:25,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 18:43:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 80 states have internal predecessors, (106), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-19 18:43:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-19 18:43:25,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:43:25,853 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:43:25,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:43:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:43:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash -729648901, now seen corresponding path program 1 times [2022-07-19 18:43:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:43:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602245864] [2022-07-19 18:43:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:43:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:43:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 18:43:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 18:43:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 18:43:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 18:43:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 18:43:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 18:43:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 18:43:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-19 18:43:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 18:43:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 18:43:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 18:43:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-19 18:43:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-19 18:43:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-19 18:43:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-19 18:43:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-19 18:43:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-19 18:43:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-19 18:43:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-19 18:43:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-19 18:43:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 18:43:29,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:43:29,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602245864] [2022-07-19 18:43:29,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602245864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:43:29,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:43:29,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:43:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123442826] [2022-07-19 18:43:29,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:43:29,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:43:29,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:43:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:43:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:43:29,327 INFO L87 Difference]: Start difference. First operand has 121 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 80 states have internal predecessors, (106), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:43:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:43:29,418 INFO L93 Difference]: Finished difference Result 244 states and 391 transitions. [2022-07-19 18:43:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:43:29,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 132 [2022-07-19 18:43:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:43:29,426 INFO L225 Difference]: With dead ends: 244 [2022-07-19 18:43:29,426 INFO L226 Difference]: Without dead ends: 121 [2022-07-19 18:43:29,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:43:29,432 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:43:29,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 336 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:43:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-19 18:43:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-07-19 18:43:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-19 18:43:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 169 transitions. [2022-07-19 18:43:29,465 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 169 transitions. Word has length 132 [2022-07-19 18:43:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:43:29,466 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 169 transitions. [2022-07-19 18:43:29,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:43:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 169 transitions. [2022-07-19 18:43:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 18:43:29,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:43:29,469 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:43:29,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 18:43:29,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:43:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:43:29,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1953842143, now seen corresponding path program 1 times [2022-07-19 18:43:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:43:29,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342451845] [2022-07-19 18:43:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:43:29,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:43:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 18:43:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 18:43:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 18:43:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 18:43:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 18:43:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 18:43:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 18:43:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 18:43:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 18:43:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 18:43:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 18:43:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 18:43:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 18:43:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 18:43:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-19 18:43:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 18:43:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-19 18:43:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 18:43:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-07-19 18:43:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 18:43:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 18:43:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:43:30,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342451845] [2022-07-19 18:43:30,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342451845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:43:30,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:43:30,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:43:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847139575] [2022-07-19 18:43:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:43:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:43:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:43:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:43:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:43:30,730 INFO L87 Difference]: Start difference. First operand 118 states and 169 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:43:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:43:30,753 INFO L93 Difference]: Finished difference Result 235 states and 338 transitions. [2022-07-19 18:43:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:43:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 135 [2022-07-19 18:43:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:43:30,756 INFO L225 Difference]: With dead ends: 235 [2022-07-19 18:43:30,756 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 18:43:30,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:43:30,758 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:43:30,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:43:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 18:43:30,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-19 18:43:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 78 states have internal predecessors, (100), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-19 18:43:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 170 transitions. [2022-07-19 18:43:30,768 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 170 transitions. Word has length 135 [2022-07-19 18:43:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:43:30,769 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 170 transitions. [2022-07-19 18:43:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:43:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 170 transitions. [2022-07-19 18:43:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-19 18:43:30,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:43:30,772 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:43:30,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 18:43:30,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:43:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:43:30,773 INFO L85 PathProgramCache]: Analyzing trace with hash -230839453, now seen corresponding path program 1 times [2022-07-19 18:43:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:43:30,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017781125] [2022-07-19 18:43:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:43:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:43:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 18:43:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 18:43:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 18:43:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 18:43:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 18:43:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 18:43:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 18:43:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-19 18:43:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 18:43:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 18:43:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 18:43:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:31,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-19 18:43:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 18:43:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-19 18:43:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-19 18:43:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-19 18:43:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 18:43:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 18:43:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-19 18:43:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-19 18:43:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 18:43:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:43:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017781125] [2022-07-19 18:43:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017781125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 18:43:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649991240] [2022-07-19 18:43:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:43:32,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:43:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:43:32,045 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) [2022-07-19 18:43:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 18:43:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 18469 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 18:43:37,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 18:43:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 18:43:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 18:43:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 18:43:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649991240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 18:43:37,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 18:43:37,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-19 18:43:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104236868] [2022-07-19 18:43:37,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 18:43:37,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 18:43:37,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:43:37,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 18:43:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-19 18:43:37,672 INFO L87 Difference]: Start difference. First operand 119 states and 170 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-19 18:43:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:43:37,713 INFO L93 Difference]: Finished difference Result 239 states and 343 transitions. [2022-07-19 18:43:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:43:37,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 137 [2022-07-19 18:43:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:43:37,717 INFO L225 Difference]: With dead ends: 239 [2022-07-19 18:43:37,717 INFO L226 Difference]: Without dead ends: 123 [2022-07-19 18:43:37,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-19 18:43:37,720 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 3 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:43:37,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 492 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:43:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-19 18:43:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-19 18:43:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-19 18:43:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2022-07-19 18:43:37,737 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 137 [2022-07-19 18:43:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:43:37,738 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2022-07-19 18:43:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-19 18:43:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2022-07-19 18:43:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-19 18:43:37,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:43:37,745 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:43:37,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 18:43:37,971 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 [2022-07-19 18:43:37,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:43:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:43:37,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1631015015, now seen corresponding path program 2 times [2022-07-19 18:43:37,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:43:37,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033614432] [2022-07-19 18:43:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:43:37,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:43:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 18:43:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 18:43:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 18:43:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 18:43:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 18:43:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 18:43:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 18:43:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 18:43:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 18:43:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-19 18:43:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 18:43:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 18:43:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 18:43:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-19 18:43:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 18:43:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-19 18:43:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 18:43:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-07-19 18:43:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 18:43:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-19 18:43:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:43:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2022-07-19 18:43:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:43:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033614432] [2022-07-19 18:43:40,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033614432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 18:43:40,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98815723] [2022-07-19 18:43:40,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 18:43:40,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:43:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:43:40,418 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) [2022-07-19 18:43:40,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 18:44:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 18:44:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 18:44:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 18077 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 18:44:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 18:44:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-07-19 18:44:13,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 18:44:13,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98815723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:44:13,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 18:44:13,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 18:44:13,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402376019] [2022-07-19 18:44:13,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:44:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 18:44:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:44:13,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 18:44:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 18:44:13,542 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:44:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:44:13,571 INFO L93 Difference]: Finished difference Result 231 states and 334 transitions. [2022-07-19 18:44:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 18:44:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2022-07-19 18:44:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:44:13,575 INFO L225 Difference]: With dead ends: 231 [2022-07-19 18:44:13,575 INFO L226 Difference]: Without dead ends: 185 [2022-07-19 18:44:13,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 18:44:13,576 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 87 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:44:13,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 582 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:44:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-19 18:44:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-07-19 18:44:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 125 states have (on average 1.312) internal successors, (164), 125 states have internal predecessors, (164), 49 states have call successors, (49), 10 states have call predecessors, (49), 10 states have return successors, (53), 49 states have call predecessors, (53), 49 states have call successors, (53) [2022-07-19 18:44:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2022-07-19 18:44:13,590 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 141 [2022-07-19 18:44:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:44:13,590 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2022-07-19 18:44:13,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-19 18:44:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2022-07-19 18:44:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-19 18:44:13,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:44:13,593 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:44:13,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 18:44:13,815 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 [2022-07-19 18:44:13,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:44:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:44:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2005931619, now seen corresponding path program 1 times [2022-07-19 18:44:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:44:13,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599713629] [2022-07-19 18:44:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:44:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:44:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 18:44:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 18:44:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 18:44:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 18:44:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:15,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 18:44:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-19 18:44:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 18:44:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-19 18:44:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 18:44:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-19 18:44:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 18:44:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-19 18:44:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-19 18:44:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-19 18:44:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 18:44:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-19 18:44:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-19 18:44:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-07-19 18:44:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-19 18:44:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-07-19 18:44:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-07-19 18:44:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-07-19 18:44:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-19 18:44:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-07-19 18:44:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-19 18:44:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-19 18:44:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-07-19 18:44:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-07-19 18:44:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-07-19 18:44:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-19 18:44:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:44:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599713629] [2022-07-19 18:44:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599713629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 18:44:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994965103] [2022-07-19 18:44:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:44:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:44:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:44:16,156 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) [2022-07-19 18:44:16,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 18:44:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:44:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 19140 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 18:44:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 18:44:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-19 18:44:23,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 18:44:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-19 18:44:23,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994965103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 18:44:23,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 18:44:23,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-07-19 18:44:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525625787] [2022-07-19 18:44:23,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 18:44:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 18:44:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:44:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 18:44:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 18:44:23,552 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-19 18:44:25,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 18:44:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:44:26,242 INFO L93 Difference]: Finished difference Result 386 states and 554 transitions. [2022-07-19 18:44:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 18:44:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 235 [2022-07-19 18:44:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:44:26,244 INFO L225 Difference]: With dead ends: 386 [2022-07-19 18:44:26,244 INFO L226 Difference]: Without dead ends: 213 [2022-07-19 18:44:26,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-19 18:44:26,245 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 49 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 18:44:26,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 610 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 18:44:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-19 18:44:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-07-19 18:44:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 146 states have (on average 1.2808219178082192) internal successors, (187), 148 states have internal predecessors, (187), 49 states have call successors, (49), 10 states have call predecessors, (49), 12 states have return successors, (57), 49 states have call predecessors, (57), 49 states have call successors, (57) [2022-07-19 18:44:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 293 transitions. [2022-07-19 18:44:26,283 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 293 transitions. Word has length 235 [2022-07-19 18:44:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:44:26,284 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 293 transitions. [2022-07-19 18:44:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-19 18:44:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 293 transitions. [2022-07-19 18:44:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 18:44:26,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:44:26,312 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:44:26,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 18:44:26,531 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 [2022-07-19 18:44:26,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:44:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:44:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1218450205, now seen corresponding path program 2 times [2022-07-19 18:44:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:44:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705284287] [2022-07-19 18:44:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:44:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms