./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:22:06,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:22:06,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:22:06,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:22:06,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:22:06,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:22:06,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:22:06,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:22:06,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:22:06,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:22:06,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:22:06,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:22:06,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:22:06,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:22:06,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:22:06,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:22:06,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:22:06,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:22:06,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:22:06,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:22:06,162 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:22:06,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:22:06,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:22:06,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:22:06,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:22:06,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:22:06,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:22:06,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:22:06,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:22:06,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:22:06,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:22:06,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:22:06,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:22:06,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:22:06,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:22:06,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:22:06,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:22:06,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:22:06,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:22:06,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:22:06,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:22:06,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:22:06,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:22:06,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:22:06,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:22:06,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:22:06,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:22:06,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:22:06,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:22:06,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:22:06,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:22:06,203 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:22:06,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:22:06,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:22:06,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:22:06,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:22:06,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:22:06,206 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:22:06,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:22:06,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:22:06,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:22:06,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:22:06,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:22:06,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:22:06,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:22:06,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:22:06,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:22:06,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:22:06,208 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:22:06,209 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:22:06,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:22:06,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-07-19 21:22:06,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:22:06,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:22:06,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:22:06,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:22:06,434 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:22:06,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-19 21:22:06,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec28733e/860892830f7f497286af1b106c5f7d23/FLAGe662d64ac [2022-07-19 21:22:06,814 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:22:06,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-07-19 21:22:06,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec28733e/860892830f7f497286af1b106c5f7d23/FLAGe662d64ac [2022-07-19 21:22:07,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec28733e/860892830f7f497286af1b106c5f7d23 [2022-07-19 21:22:07,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:22:07,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:22:07,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:22:07,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:22:07,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:22:07,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdd3f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07, skipping insertion in model container [2022-07-19 21:22:07,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:22:07,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:22:07,428 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/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-07-19 21:22:07,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:22:07,437 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:22:07,457 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/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-07-19 21:22:07,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:22:07,470 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:22:07,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07 WrapperNode [2022-07-19 21:22:07,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:22:07,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:22:07,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:22:07,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:22:07,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,506 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-19 21:22:07,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:22:07,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:22:07,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:22:07,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:22:07,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:22:07,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:22:07,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:22:07,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:22:07,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (1/1) ... [2022-07-19 21:22:07,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:22:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:07,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:22:07,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:22:07,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:22:07,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:22:07,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:22:07,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:22:07,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:22:07,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:22:07,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:22:07,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:22:07,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:22:07,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:22:07,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:22:07,606 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:22:07,667 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:22:07,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:22:07,915 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:22:07,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:22:07,923 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:22:07,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:22:07 BoogieIcfgContainer [2022-07-19 21:22:07,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:22:07,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:22:07,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:22:07,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:22:07,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:22:07" (1/3) ... [2022-07-19 21:22:07,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d016ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:22:07, skipping insertion in model container [2022-07-19 21:22:07,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:22:07" (2/3) ... [2022-07-19 21:22:07,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d016ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:22:07, skipping insertion in model container [2022-07-19 21:22:07,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:22:07" (3/3) ... [2022-07-19 21:22:07,932 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-07-19 21:22:07,936 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:22:07,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:22:07,944 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:22:07,944 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:22:08,003 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:22:08,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-07-19 21:22:08,095 INFO L129 PetriNetUnfolder]: 10/133 cut-off events. [2022-07-19 21:22:08,095 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:22:08,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-07-19 21:22:08,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-07-19 21:22:08,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-07-19 21:22:08,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:22:08,118 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@4cdf57ce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a94c383 [2022-07-19 21:22:08,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:22:08,141 INFO L129 PetriNetUnfolder]: 10/119 cut-off events. [2022-07-19 21:22:08,141 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:22:08,142 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:08,142 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:08,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash -315421393, now seen corresponding path program 1 times [2022-07-19 21:22:08,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903816091] [2022-07-19 21:22:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903816091] [2022-07-19 21:22:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903816091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:08,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:08,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:22:08,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108104398] [2022-07-19 21:22:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:08,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:22:08,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:22:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:22:08,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2022-07-19 21:22:08,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:08,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2022-07-19 21:22:08,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:08,429 INFO L129 PetriNetUnfolder]: 4/114 cut-off events. [2022-07-19 21:22:08,429 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:22:08,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2022-07-19 21:22:08,432 INFO L132 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2022-07-19 21:22:08,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2022-07-19 21:22:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:22:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:22:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-19 21:22:08,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2022-07-19 21:22:08,444 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-19 21:22:08,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-19 21:22:08,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:08,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-19 21:22:08,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,454 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,455 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2022-07-19 21:22:08,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2022-07-19 21:22:08,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:22:08,462 INFO L242 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2022-07-19 21:22:08,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2022-07-19 21:22:08,467 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-07-19 21:22:08,467 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2022-07-19 21:22:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:08,468 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:22:08,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1566756150, now seen corresponding path program 1 times [2022-07-19 21:22:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:08,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255826675] [2022-07-19 21:22:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:08,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:08,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255826675] [2022-07-19 21:22:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255826675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:08,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:22:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223514977] [2022-07-19 21:22:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:22:08,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:22:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:22:08,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2022-07-19 21:22:08,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:08,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:08,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2022-07-19 21:22:08,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:10,123 INFO L129 PetriNetUnfolder]: 5788/8844 cut-off events. [2022-07-19 21:22:10,124 INFO L130 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2022-07-19 21:22:10,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16925 conditions, 8844 events. 5788/8844 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 52427 event pairs, 3285 based on Foata normal form. 1/7225 useless extension candidates. Maximal degree in co-relation 16922. Up to 7342 conditions per place. [2022-07-19 21:22:10,200 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2022-07-19 21:22:10,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2022-07-19 21:22:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:22:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:22:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2022-07-19 21:22:10,207 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2022-07-19 21:22:10,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2022-07-19 21:22:10,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2022-07-19 21:22:10,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:10,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2022-07-19 21:22:10,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:10,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:10,216 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:10,216 INFO L186 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2022-07-19 21:22:10,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2022-07-19 21:22:10,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:22:10,221 INFO L242 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2022-07-19 21:22:10,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2022-07-19 21:22:10,223 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-07-19 21:22:10,223 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2022-07-19 21:22:10,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:10,224 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:10,224 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:10,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:22:10,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash 577411595, now seen corresponding path program 1 times [2022-07-19 21:22:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:10,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746981056] [2022-07-19 21:22:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746981056] [2022-07-19 21:22:10,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746981056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165792630] [2022-07-19 21:22:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:10,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:10,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:22:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:10,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:22:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:11,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:11,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165792630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:11,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:11,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-19 21:22:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143339941] [2022-07-19 21:22:11,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:11,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:22:11,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:22:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:22:11,305 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:11,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:11,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:11,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:11,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:13,353 INFO L129 PetriNetUnfolder]: 9819/14701 cut-off events. [2022-07-19 21:22:13,353 INFO L130 PetriNetUnfolder]: For 2287/2361 co-relation queries the response was YES. [2022-07-19 21:22:13,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31278 conditions, 14701 events. 9819/14701 cut-off events. For 2287/2361 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 94613 event pairs, 1381 based on Foata normal form. 2/12471 useless extension candidates. Maximal degree in co-relation 31271. Up to 6565 conditions per place. [2022-07-19 21:22:13,475 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 181 selfloop transitions, 26 changer transitions 1/270 dead transitions. [2022-07-19 21:22:13,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 270 transitions, 1086 flow [2022-07-19 21:22:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:22:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:22:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-19 21:22:13,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-19 21:22:13,480 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-19 21:22:13,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-19 21:22:13,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:13,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-19 21:22:13,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,490 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,490 INFO L186 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 14 states and 1306 transitions. [2022-07-19 21:22:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 270 transitions, 1086 flow [2022-07-19 21:22:13,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 1063 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-19 21:22:13,499 INFO L242 Difference]: Finished difference. Result has 138 places, 132 transitions, 434 flow [2022-07-19 21:22:13,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=434, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2022-07-19 21:22:13,502 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 15 predicate places. [2022-07-19 21:22:13,502 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 434 flow [2022-07-19 21:22:13,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.14285714285714) internal successors, (1150), 14 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,503 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:13,503 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:13,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:13,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash -291748005, now seen corresponding path program 2 times [2022-07-19 21:22:13,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937939648] [2022-07-19 21:22:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:13,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937939648] [2022-07-19 21:22:13,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937939648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:13,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:13,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:22:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802952361] [2022-07-19 21:22:13,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:22:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:22:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:22:13,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:13,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:13,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:13,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:13,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:15,408 INFO L129 PetriNetUnfolder]: 9701/14987 cut-off events. [2022-07-19 21:22:15,409 INFO L130 PetriNetUnfolder]: For 20337/20370 co-relation queries the response was YES. [2022-07-19 21:22:15,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40057 conditions, 14987 events. 9701/14987 cut-off events. For 20337/20370 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 99177 event pairs, 5925 based on Foata normal form. 35/13578 useless extension candidates. Maximal degree in co-relation 40044. Up to 12875 conditions per place. [2022-07-19 21:22:15,624 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2022-07-19 21:22:15,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 158 transitions, 742 flow [2022-07-19 21:22:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:22:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:22:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-19 21:22:15,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-19 21:22:15,637 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-19 21:22:15,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-19 21:22:15,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:15,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-19 21:22:15,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:15,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:15,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:15,641 INFO L186 Difference]: Start difference. First operand has 138 places, 132 transitions, 434 flow. Second operand 6 states and 550 transitions. [2022-07-19 21:22:15,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 158 transitions, 742 flow [2022-07-19 21:22:15,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 158 transitions, 727 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:22:15,679 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 502 flow [2022-07-19 21:22:15,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2022-07-19 21:22:15,681 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 18 predicate places. [2022-07-19 21:22:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 502 flow [2022-07-19 21:22:15,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:15,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:15,683 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:22:15,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 38846005, now seen corresponding path program 1 times [2022-07-19 21:22:15,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401338470] [2022-07-19 21:22:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:15,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:15,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401338470] [2022-07-19 21:22:15,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401338470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:15,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158810540] [2022-07-19 21:22:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:15,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:15,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:22:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:22:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:22:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:16,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:22:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:16,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158810540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:22:16,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:22:16,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-19 21:22:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154567075] [2022-07-19 21:22:16,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:22:16,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:22:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:22:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:22:16,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:16,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 502 flow. Second operand has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:16,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:16,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:16,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:19,269 INFO L129 PetriNetUnfolder]: 15341/24600 cut-off events. [2022-07-19 21:22:19,269 INFO L130 PetriNetUnfolder]: For 39084/39167 co-relation queries the response was YES. [2022-07-19 21:22:19,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66755 conditions, 24600 events. 15341/24600 cut-off events. For 39084/39167 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 183614 event pairs, 2068 based on Foata normal form. 2/22703 useless extension candidates. Maximal degree in co-relation 66739. Up to 10037 conditions per place. [2022-07-19 21:22:19,486 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 255 selfloop transitions, 30 changer transitions 1/348 dead transitions. [2022-07-19 21:22:19,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 348 transitions, 2165 flow [2022-07-19 21:22:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:22:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:22:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1306 transitions. [2022-07-19 21:22:19,490 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6809176225234619 [2022-07-19 21:22:19,490 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1306 transitions. [2022-07-19 21:22:19,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1306 transitions. [2022-07-19 21:22:19,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:19,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1306 transitions. [2022-07-19 21:22:19,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.28571428571429) internal successors, (1306), 14 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:19,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:19,498 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:19,498 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 502 flow. Second operand 14 states and 1306 transitions. [2022-07-19 21:22:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 348 transitions, 2165 flow [2022-07-19 21:22:19,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 348 transitions, 2090 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-19 21:22:19,534 INFO L242 Difference]: Finished difference. Result has 160 places, 152 transitions, 677 flow [2022-07-19 21:22:19,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=677, PETRI_PLACES=160, PETRI_TRANSITIONS=152} [2022-07-19 21:22:19,537 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 37 predicate places. [2022-07-19 21:22:19,537 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 152 transitions, 677 flow [2022-07-19 21:22:19,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.71428571428571) internal successors, (1158), 14 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:19,538 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:19,538 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:19,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:22:19,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:19,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1609667139, now seen corresponding path program 2 times [2022-07-19 21:22:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457071992] [2022-07-19 21:22:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:19,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457071992] [2022-07-19 21:22:19,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457071992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:19,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:19,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:22:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183929462] [2022-07-19 21:22:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:20,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:22:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:22:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:22:20,001 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:20,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 152 transitions, 677 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:20,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:20,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:20,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:22,067 INFO L129 PetriNetUnfolder]: 15101/23111 cut-off events. [2022-07-19 21:22:22,067 INFO L130 PetriNetUnfolder]: For 50097/50148 co-relation queries the response was YES. [2022-07-19 21:22:22,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77177 conditions, 23111 events. 15101/23111 cut-off events. For 50097/50148 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 161465 event pairs, 7081 based on Foata normal form. 21/22936 useless extension candidates. Maximal degree in co-relation 77153. Up to 20415 conditions per place. [2022-07-19 21:22:22,278 INFO L132 encePairwiseOnDemand]: 126/137 looper letters, 95 selfloop transitions, 17 changer transitions 8/182 dead transitions. [2022-07-19 21:22:22,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 182 transitions, 1127 flow [2022-07-19 21:22:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:22:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:22:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-07-19 21:22:22,285 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-07-19 21:22:22,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-07-19 21:22:22,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-07-19 21:22:22,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:22,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-07-19 21:22:22,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:22,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:22,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:22,289 INFO L186 Difference]: Start difference. First operand has 160 places, 152 transitions, 677 flow. Second operand 6 states and 550 transitions. [2022-07-19 21:22:22,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 182 transitions, 1127 flow [2022-07-19 21:22:22,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 182 transitions, 1119 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-19 21:22:22,433 INFO L242 Difference]: Finished difference. Result has 164 places, 156 transitions, 774 flow [2022-07-19 21:22:22,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=164, PETRI_TRANSITIONS=156} [2022-07-19 21:22:22,435 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 41 predicate places. [2022-07-19 21:22:22,435 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 156 transitions, 774 flow [2022-07-19 21:22:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:22,435 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:22,435 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:22,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:22:22,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905056, now seen corresponding path program 1 times [2022-07-19 21:22:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554168764] [2022-07-19 21:22:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554168764] [2022-07-19 21:22:22,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554168764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:22,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:22,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:22:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565076205] [2022-07-19 21:22:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:22:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:22:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:22:22,773 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:22,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 156 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:22,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:22,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:22,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:25,073 INFO L129 PetriNetUnfolder]: 16638/25497 cut-off events. [2022-07-19 21:22:25,073 INFO L130 PetriNetUnfolder]: For 65358/65421 co-relation queries the response was YES. [2022-07-19 21:22:25,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86692 conditions, 25497 events. 16638/25497 cut-off events. For 65358/65421 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 179760 event pairs, 8095 based on Foata normal form. 480/25661 useless extension candidates. Maximal degree in co-relation 86665. Up to 16663 conditions per place. [2022-07-19 21:22:25,418 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 132 selfloop transitions, 21 changer transitions 2/217 dead transitions. [2022-07-19 21:22:25,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1451 flow [2022-07-19 21:22:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:22:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:22:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-19 21:22:25,420 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-19 21:22:25,420 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-19 21:22:25,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-19 21:22:25,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:25,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-19 21:22:25,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,425 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,425 INFO L186 Difference]: Start difference. First operand has 164 places, 156 transitions, 774 flow. Second operand 7 states and 649 transitions. [2022-07-19 21:22:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1451 flow [2022-07-19 21:22:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1412 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-19 21:22:25,586 INFO L242 Difference]: Finished difference. Result has 169 places, 157 transitions, 816 flow [2022-07-19 21:22:25,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=816, PETRI_PLACES=169, PETRI_TRANSITIONS=157} [2022-07-19 21:22:25,587 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 46 predicate places. [2022-07-19 21:22:25,587 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 157 transitions, 816 flow [2022-07-19 21:22:25,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:25,588 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:22:25,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2065430376, now seen corresponding path program 1 times [2022-07-19 21:22:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:25,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402492626] [2022-07-19 21:22:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402492626] [2022-07-19 21:22:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402492626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:22:25,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:22:25,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:22:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385061672] [2022-07-19 21:22:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:22:25,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:22:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:22:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:22:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:22:25,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-07-19 21:22:25,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 157 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:25,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:22:25,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-07-19 21:22:25,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:22:28,152 INFO L129 PetriNetUnfolder]: 18218/27769 cut-off events. [2022-07-19 21:22:28,152 INFO L130 PetriNetUnfolder]: For 80925/80966 co-relation queries the response was YES. [2022-07-19 21:22:28,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99125 conditions, 27769 events. 18218/27769 cut-off events. For 80925/80966 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 195341 event pairs, 9843 based on Foata normal form. 488/27942 useless extension candidates. Maximal degree in co-relation 99097. Up to 19090 conditions per place. [2022-07-19 21:22:28,540 INFO L132 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2022-07-19 21:22:28,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 1531 flow [2022-07-19 21:22:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:22:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:22:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-07-19 21:22:28,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-07-19 21:22:28,543 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-07-19 21:22:28,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-07-19 21:22:28,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:22:28,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-07-19 21:22:28,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,548 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,548 INFO L186 Difference]: Start difference. First operand has 169 places, 157 transitions, 816 flow. Second operand 7 states and 649 transitions. [2022-07-19 21:22:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 1531 flow [2022-07-19 21:22:28,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1506 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:22:28,694 INFO L242 Difference]: Finished difference. Result has 173 places, 158 transitions, 870 flow [2022-07-19 21:22:28,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-07-19 21:22:28,695 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2022-07-19 21:22:28,696 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 870 flow [2022-07-19 21:22:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:22:28,696 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:22:28,696 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:22:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:22:28,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:22:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:22:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1961029637, now seen corresponding path program 1 times [2022-07-19 21:22:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:22:28,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491272926] [2022-07-19 21:22:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:22:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:22:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:22:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:22:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491272926] [2022-07-19 21:22:30,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491272926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:22:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543123636] [2022-07-19 21:22:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:22:30,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:22:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:22:30,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:22:30,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process