./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/reducercommutativity/sum60-2.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 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:20:44,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:20:44,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:20:44,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:20:44,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:20:44,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:20:44,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:20:44,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:20:44,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:20:44,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:20:44,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:20:44,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:20:44,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:20:44,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:20:44,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:20:44,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:20:44,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:20:44,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:20:44,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:20:44,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:20:44,095 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:20:44,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:20:44,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:20:44,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:20:44,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:20:44,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:20:44,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:20:44,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:20:44,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:20:44,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:20:44,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:20:44,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:20:44,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:20:44,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:20:44,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:20:44,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:20:44,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:20:44,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:20:44,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:20:44,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:20:44,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:20:44,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:20:44,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:20:44,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:20:44,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:20:44,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:20:44,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:20:44,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:20:44,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:20:44,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:20:44,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:20:44,150 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:20:44,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:20:44,151 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:20:44,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:20:44,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:20:44,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:20:44,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:20:44,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:20:44,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:20:44,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:20:44,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:20:44,154 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:20:44,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:20:44,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:20:44,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:20:44,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:20:44,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:20:44,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:20:44,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:20:44,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:20:44,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:20:44,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:20:44,156 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:20:44,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:20:44,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:20:44,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 [2022-07-11 22:20:44,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:20:44,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:20:44,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:20:44,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:20:44,435 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:20:44,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum60-2.i [2022-07-11 22:20:44,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5060936/756de1dd63a844aca37e5a67d57019f5/FLAG00b871c6b [2022-07-11 22:20:44,854 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:20:44,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum60-2.i [2022-07-11 22:20:44,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5060936/756de1dd63a844aca37e5a67d57019f5/FLAG00b871c6b [2022-07-11 22:20:44,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5060936/756de1dd63a844aca37e5a67d57019f5 [2022-07-11 22:20:44,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:20:44,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:20:44,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:20:44,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:20:44,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:20:44,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:20:44" (1/1) ... [2022-07-11 22:20:44,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56dee87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:44, skipping insertion in model container [2022-07-11 22:20:44,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:20:44" (1/1) ... [2022-07-11 22:20:44,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:20:44,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:20:45,051 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/reducercommutativity/sum60-2.i[1277,1290] [2022-07-11 22:20:45,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:20:45,063 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:20:45,081 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/reducercommutativity/sum60-2.i[1277,1290] [2022-07-11 22:20:45,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:20:45,094 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:20:45,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45 WrapperNode [2022-07-11 22:20:45,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:20:45,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:20:45,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:20:45,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:20:45,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,124 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-11 22:20:45,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:20:45,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:20:45,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:20:45,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:20:45,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:20:45,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:20:45,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:20:45,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:20:45,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (1/1) ... [2022-07-11 22:20:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:20:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:45,177 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) [2022-07-11 22:20:45,179 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 [2022-07-11 22:20:45,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:20:45,205 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-07-11 22:20:45,205 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-07-11 22:20:45,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:20:45,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:20:45,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:20:45,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:20:45,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:20:45,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:20:45,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:20:45,258 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:20:45,259 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:20:45,377 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:20:45,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:20:45,383 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:20:45,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:20:45 BoogieIcfgContainer [2022-07-11 22:20:45,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:20:45,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:20:45,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:20:45,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:20:45,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:20:44" (1/3) ... [2022-07-11 22:20:45,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e77ddd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:20:45, skipping insertion in model container [2022-07-11 22:20:45,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:20:45" (2/3) ... [2022-07-11 22:20:45,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e77ddd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:20:45, skipping insertion in model container [2022-07-11 22:20:45,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:20:45" (3/3) ... [2022-07-11 22:20:45,403 INFO L111 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2022-07-11 22:20:45,430 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:20:45,442 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:20:45,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:20:45,516 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@1518d425, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58c8c2a2 [2022-07-11 22:20:45,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:20:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:20:45,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:45,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:45,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-07-11 22:20:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:45,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105884097] [2022-07-11 22:20:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:45,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:45,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 22:20:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 22:20:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:45,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:20:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 22:20:45,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105884097] [2022-07-11 22:20:45,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105884097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996051743] [2022-07-11 22:20:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:45,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:45,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:45,799 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) [2022-07-11 22:20:45,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:20:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:45,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:20:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:20:45,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:20:45,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996051743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:20:45,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:20:45,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 22:20:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595249428] [2022-07-11 22:20:45,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:20:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:20:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:20:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:20:45,928 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:20:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:45,955 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-11 22:20:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:20:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-11 22:20:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:45,963 INFO L225 Difference]: With dead ends: 50 [2022-07-11 22:20:45,964 INFO L226 Difference]: Without dead ends: 24 [2022-07-11 22:20:45,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:20:45,969 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:45,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-11 22:20:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-11 22:20:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-11 22:20:46,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-11 22:20:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:46,002 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-11 22:20:46,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:20:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-11 22:20:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:20:46,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:46,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:46,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:20:46,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-11 22:20:46,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-07-11 22:20:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:46,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784158732] [2022-07-11 22:20:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:46,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:20:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:20:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:20:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:20:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:46,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784158732] [2022-07-11 22:20:46,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784158732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699091959] [2022-07-11 22:20:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:46,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:46,292 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) [2022-07-11 22:20:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:20:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:20:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:20:46,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:20:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699091959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:20:46,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:20:46,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 22:20:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028519497] [2022-07-11 22:20:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:20:46,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:20:46,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:20:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:20:46,410 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:20:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:46,422 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-11 22:20:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:20:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:20:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:46,426 INFO L225 Difference]: With dead ends: 42 [2022-07-11 22:20:46,426 INFO L226 Difference]: Without dead ends: 25 [2022-07-11 22:20:46,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:20:46,428 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:46,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-11 22:20:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-11 22:20:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-11 22:20:46,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-11 22:20:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:46,441 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-11 22:20:46,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:20:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-11 22:20:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 22:20:46,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:46,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:46,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:46,651 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,SelfDestructingSolverStorable1 [2022-07-11 22:20:46,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-07-11 22:20:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:46,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587427704] [2022-07-11 22:20:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:46,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:20:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 22:20:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:20:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 22:20:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:46,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587427704] [2022-07-11 22:20:46,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587427704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:46,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19771270] [2022-07-11 22:20:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:46,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:46,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:46,768 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) [2022-07-11 22:20:46,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:20:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:20:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 22:20:46,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:20:46,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19771270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:20:46,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:20:46,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 22:20:46,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492080644] [2022-07-11 22:20:46,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:20:46,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:20:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:20:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:20:46,898 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:20:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:46,915 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-11 22:20:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:20:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-11 22:20:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:46,916 INFO L225 Difference]: With dead ends: 39 [2022-07-11 22:20:46,916 INFO L226 Difference]: Without dead ends: 26 [2022-07-11 22:20:46,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:20:46,918 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 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 [2022-07-11 22:20:46,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-11 22:20:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-11 22:20:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-11 22:20:46,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-11 22:20:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:46,930 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-11 22:20:46,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:20:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-11 22:20:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 22:20:46,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:46,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:46,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:47,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:47,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-07-11 22:20:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:47,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542443507] [2022-07-11 22:20:47,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:47,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:20:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 22:20:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:20:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 22:20:47,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542443507] [2022-07-11 22:20:47,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542443507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494655636] [2022-07-11 22:20:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:47,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:47,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:47,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:20:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:20:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 22:20:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-11 22:20:47,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494655636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:47,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:47,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-11 22:20:47,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566767542] [2022-07-11 22:20:47,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:47,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:20:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:20:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:20:47,400 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:47,448 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-11 22:20:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 22:20:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-11 22:20:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:47,453 INFO L225 Difference]: With dead ends: 54 [2022-07-11 22:20:47,454 INFO L226 Difference]: Without dead ends: 34 [2022-07-11 22:20:47,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:20:47,456 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:47,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-11 22:20:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-11 22:20:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-11 22:20:47,475 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-11 22:20:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:47,476 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-11 22:20:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-11 22:20:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 22:20:47,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:47,479 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:47,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:47,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-07-11 22:20:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:47,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347535733] [2022-07-11 22:20:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-11 22:20:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 22:20:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-11 22:20:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-11 22:20:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347535733] [2022-07-11 22:20:47,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347535733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022741678] [2022-07-11 22:20:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:20:47,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:47,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:47,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:20:47,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:20:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:20:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 22:20:47,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-11 22:20:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022741678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:48,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:48,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-11 22:20:48,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075786083] [2022-07-11 22:20:48,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:48,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 22:20:48,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 22:20:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:20:48,037 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:20:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:48,089 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-11 22:20:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:20:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-11 22:20:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:48,091 INFO L225 Difference]: With dead ends: 70 [2022-07-11 22:20:48,091 INFO L226 Difference]: Without dead ends: 48 [2022-07-11 22:20:48,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:20:48,093 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:48,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-11 22:20:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-11 22:20:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-11 22:20:48,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-11 22:20:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:48,100 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-11 22:20:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:20:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-11 22:20:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 22:20:48,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:48,102 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:48,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 22:20:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:48,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-07-11 22:20:48,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:48,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197309129] [2022-07-11 22:20:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 22:20:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 22:20:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:20:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-11 22:20:48,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:48,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197309129] [2022-07-11 22:20:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197309129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451065828] [2022-07-11 22:20:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:20:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:48,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:48,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:20:48,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:20:48,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:20:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-11 22:20:48,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-11 22:20:48,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451065828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:48,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:48,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-11 22:20:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591851518] [2022-07-11 22:20:48,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:20:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:20:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:20:48,649 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:48,701 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-11 22:20:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 22:20:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-11 22:20:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:48,702 INFO L225 Difference]: With dead ends: 82 [2022-07-11 22:20:48,702 INFO L226 Difference]: Without dead ends: 58 [2022-07-11 22:20:48,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:20:48,704 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:48,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-11 22:20:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-11 22:20:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-11 22:20:48,711 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-07-11 22:20:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:48,712 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-11 22:20:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-11 22:20:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-11 22:20:48,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:48,713 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:48,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:48,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:48,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-07-11 22:20:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:48,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272787839] [2022-07-11 22:20:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:48,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:20:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-11 22:20:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-11 22:20:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-11 22:20:49,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272787839] [2022-07-11 22:20:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272787839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147986640] [2022-07-11 22:20:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:20:49,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:49,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:49,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:20:49,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:20:49,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:20:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-11 22:20:49,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-11 22:20:49,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147986640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:49,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:49,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-07-11 22:20:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289405593] [2022-07-11 22:20:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:20:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:20:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:20:49,325 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:49,395 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-11 22:20:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:20:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-11 22:20:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:49,400 INFO L225 Difference]: With dead ends: 100 [2022-07-11 22:20:49,400 INFO L226 Difference]: Without dead ends: 68 [2022-07-11 22:20:49,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:20:49,404 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:20:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-11 22:20:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-11 22:20:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-11 22:20:49,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-07-11 22:20:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:49,425 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-11 22:20:49,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-11 22:20:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-11 22:20:49,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:49,429 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:49,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:49,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-07-11 22:20:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:49,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136108541] [2022-07-11 22:20:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:20:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-11 22:20:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 22:20:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-11 22:20:49,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136108541] [2022-07-11 22:20:49,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136108541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:49,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407035179] [2022-07-11 22:20:49,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:20:49,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:49,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:49,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:20:50,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-11 22:20:50,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:20:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-11 22:20:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-11 22:20:50,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407035179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:50,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:50,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-07-11 22:20:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605396399] [2022-07-11 22:20:50,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:50,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 22:20:50,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:50,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 22:20:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:20:50,662 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:50,748 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-07-11 22:20:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:20:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-07-11 22:20:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:50,750 INFO L225 Difference]: With dead ends: 126 [2022-07-11 22:20:50,750 INFO L226 Difference]: Without dead ends: 86 [2022-07-11 22:20:50,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:20:50,752 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:50,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:20:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-11 22:20:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-11 22:20:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-11 22:20:50,759 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-07-11 22:20:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:50,759 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-11 22:20:50,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-11 22:20:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 22:20:50,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:50,761 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:50,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:50,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-11 22:20:50,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-07-11 22:20:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55822020] [2022-07-11 22:20:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 22:20:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-11 22:20:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:51,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-11 22:20:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-11 22:20:51,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:51,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55822020] [2022-07-11 22:20:51,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55822020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:51,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369694693] [2022-07-11 22:20:51,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:20:51,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:51,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:51,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:51,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:20:51,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-11 22:20:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:20:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-07-11 22:20:51,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-11 22:20:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369694693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:51,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:51,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-11 22:20:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126412327] [2022-07-11 22:20:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 22:20:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 22:20:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-11 22:20:51,767 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:51,856 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-07-11 22:20:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 22:20:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-07-11 22:20:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:51,857 INFO L225 Difference]: With dead ends: 160 [2022-07-11 22:20:51,858 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 22:20:51,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-11 22:20:51,859 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:51,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:20:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 22:20:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-11 22:20:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-11 22:20:51,867 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-07-11 22:20:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:51,867 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-11 22:20:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-11 22:20:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-11 22:20:51,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:51,869 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:51,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:52,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:52,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-07-11 22:20:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972119462] [2022-07-11 22:20:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:52,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:20:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-11 22:20:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:52,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-11 22:20:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:52,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:52,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972119462] [2022-07-11 22:20:52,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972119462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:52,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090345346] [2022-07-11 22:20:52,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:20:52,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:52,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:52,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:20:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:20:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:52,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:52,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090345346] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:52,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:52,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-11 22:20:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213224365] [2022-07-11 22:20:52,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:52,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 22:20:52,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:52,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 22:20:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:20:52,866 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:52,948 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-07-11 22:20:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 22:20:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-07-11 22:20:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:52,950 INFO L225 Difference]: With dead ends: 207 [2022-07-11 22:20:52,950 INFO L226 Difference]: Without dead ends: 135 [2022-07-11 22:20:52,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:20:52,952 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:52,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:20:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-11 22:20:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-11 22:20:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-07-11 22:20:52,960 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-07-11 22:20:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:52,960 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-07-11 22:20:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-07-11 22:20:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-11 22:20:52,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:52,962 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:52,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:53,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:20:53,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2022-07-11 22:20:53,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:53,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75566422] [2022-07-11 22:20:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:53,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:20:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:53,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-11 22:20:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-11 22:20:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:53,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75566422] [2022-07-11 22:20:53,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75566422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:53,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448930491] [2022-07-11 22:20:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:20:53,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:53,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:53,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:20:53,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:20:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-11 22:20:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:54,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-11 22:20:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448930491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:55,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:55,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2022-07-11 22:20:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541298090] [2022-07-11 22:20:55,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:55,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-11 22:20:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-11 22:20:55,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 22:20:55,073 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:55,223 INFO L93 Difference]: Finished difference Result 267 states and 304 transitions. [2022-07-11 22:20:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-11 22:20:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-07-11 22:20:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:55,226 INFO L225 Difference]: With dead ends: 267 [2022-07-11 22:20:55,226 INFO L226 Difference]: Without dead ends: 195 [2022-07-11 22:20:55,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 22:20:55,229 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:55,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 178 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:20:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-11 22:20:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-07-11 22:20:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2022-07-11 22:20:55,243 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 200 [2022-07-11 22:20:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:55,244 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2022-07-11 22:20:55,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:20:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2022-07-11 22:20:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-11 22:20:55,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:55,247 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:55,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-11 22:20:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-11 22:20:55,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -966879109, now seen corresponding path program 9 times [2022-07-11 22:20:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053301496] [2022-07-11 22:20:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-11 22:20:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-07-11 22:20:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:55,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-07-11 22:20:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2022-07-11 22:20:55,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:20:55,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053301496] [2022-07-11 22:20:55,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053301496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:20:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809880990] [2022-07-11 22:20:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:20:55,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:20:55,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:20:55,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:20:55,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:20:58,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-11 22:20:58,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:20:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:20:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:20:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2022-07-11 22:20:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:20:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2022-07-11 22:20:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809880990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:20:59,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:20:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-07-11 22:20:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571814419] [2022-07-11 22:20:59,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:20:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 22:20:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:20:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 22:20:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-07-11 22:20:59,097 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:20:59,167 INFO L93 Difference]: Finished difference Result 298 states and 323 transitions. [2022-07-11 22:20:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 22:20:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 260 [2022-07-11 22:20:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:20:59,172 INFO L225 Difference]: With dead ends: 298 [2022-07-11 22:20:59,172 INFO L226 Difference]: Without dead ends: 227 [2022-07-11 22:20:59,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-07-11 22:20:59,174 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:20:59,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 112 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:20:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-11 22:20:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-07-11 22:20:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:20:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-07-11 22:20:59,182 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 260 [2022-07-11 22:20:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:20:59,183 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-07-11 22:20:59,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:20:59,184 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-07-11 22:20:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-11 22:20:59,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:20:59,188 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:20:59,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:20:59,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:20:59,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:20:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:20:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -624378789, now seen corresponding path program 10 times [2022-07-11 22:20:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:20:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696810961] [2022-07-11 22:20:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:20:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:20:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:20:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-11 22:20:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:00,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-07-11 22:21:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:00,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-07-11 22:21:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 0 proven. 4628 refuted. 0 times theorem prover too weak. 7463 trivial. 0 not checked. [2022-07-11 22:21:00,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:00,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696810961] [2022-07-11 22:21:00,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696810961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:21:00,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904618936] [2022-07-11 22:21:00,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:21:00,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:21:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:21:00,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:21:00,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:21:00,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:21:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:21:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:21:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:21:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 3730 proven. 196 refuted. 0 times theorem prover too weak. 8165 trivial. 0 not checked. [2022-07-11 22:21:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:21:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 11895 trivial. 0 not checked. [2022-07-11 22:21:01,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904618936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:21:01,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:21:01,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17, 17] total 63 [2022-07-11 22:21:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600550460] [2022-07-11 22:21:01,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:21:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-11 22:21:01,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:21:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-11 22:21:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 22:21:01,195 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:21:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:21:01,352 INFO L93 Difference]: Finished difference Result 365 states and 391 transitions. [2022-07-11 22:21:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-11 22:21:01,353 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 356 [2022-07-11 22:21:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:21:01,355 INFO L225 Difference]: With dead ends: 365 [2022-07-11 22:21:01,355 INFO L226 Difference]: Without dead ends: 262 [2022-07-11 22:21:01,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 22:21:01,357 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:21:01,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:21:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-11 22:21:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-07-11 22:21:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:21:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-07-11 22:21:01,365 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 356 [2022-07-11 22:21:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:21:01,366 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-07-11 22:21:01,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:21:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-07-11 22:21:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-11 22:21:01,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:21:01,371 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 60, 60, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:21:01,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:21:01,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:21:01,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:21:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:21:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1346460359, now seen corresponding path program 11 times [2022-07-11 22:21:01,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:21:01,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3533963] [2022-07-11 22:21:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:21:01,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:21:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-11 22:21:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:02,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-07-11 22:21:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:02,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 323 [2022-07-11 22:21:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:21:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13350 backedges. 0 proven. 4937 refuted. 0 times theorem prover too weak. 8413 trivial. 0 not checked. [2022-07-11 22:21:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:21:02,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3533963] [2022-07-11 22:21:02,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3533963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:21:02,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539232080] [2022-07-11 22:21:02,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:21:02,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:21:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:21:02,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:21:02,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process