./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/pthread-lit/fkp2013_variant-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f1a33edf94ce8e584ad249b95ad5bb2102c6ab4d820eebd8874b39ecbf22785 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:50:44,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:50:44,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:50:44,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:50:44,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:50:44,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:50:44,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:50:44,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:50:44,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:50:44,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:50:44,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:50:44,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:50:44,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:50:44,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:50:44,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:50:44,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:50:44,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:50:44,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:50:44,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:50:44,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:50:44,153 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:50:44,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:50:44,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:50:44,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:50:44,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:50:44,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:50:44,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:50:44,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:50:44,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:50:44,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:50:44,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:50:44,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:50:44,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:50:44,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:50:44,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:50:44,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:50:44,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:50:44,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:50:44,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:50:44,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:50:44,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:50:44,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:50:44,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:50:44,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:50:44,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:50:44,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:50:44,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:50:44,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:50:44,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:50:44,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:50:44,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:50:44,190 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:50:44,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:50:44,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:50:44,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:50:44,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:50:44,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:50:44,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:50:44,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:50:44,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:50:44,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:50:44,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:50:44,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:50:44,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f1a33edf94ce8e584ad249b95ad5bb2102c6ab4d820eebd8874b39ecbf22785 [2022-07-13 21:50:44,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:50:44,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:50:44,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:50:44,395 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:50:44,399 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:50:44,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i [2022-07-13 21:50:44,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862341bf8/497f761013024c4c8f708c38e5522856/FLAG21eb9cdc2 [2022-07-13 21:50:44,821 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:50:44,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i [2022-07-13 21:50:44,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862341bf8/497f761013024c4c8f708c38e5522856/FLAG21eb9cdc2 [2022-07-13 21:50:45,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862341bf8/497f761013024c4c8f708c38e5522856 [2022-07-13 21:50:45,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:50:45,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:50:45,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:50:45,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:50:45,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:50:45,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d81b6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45, skipping insertion in model container [2022-07-13 21:50:45,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:50:45,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:50:45,446 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/pthread-lit/fkp2013_variant-1.i[30003,30016] [2022-07-13 21:50:45,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:50:45,470 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:50:45,503 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/pthread-lit/fkp2013_variant-1.i[30003,30016] [2022-07-13 21:50:45,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:50:45,543 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:50:45,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45 WrapperNode [2022-07-13 21:50:45,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:50:45,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:50:45,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:50:45,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:50:45,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,589 INFO L137 Inliner]: procedures = 172, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-07-13 21:50:45,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:50:45,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:50:45,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:50:45,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:50:45,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:50:45,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:50:45,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:50:45,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:50:45,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (1/1) ... [2022-07-13 21:50:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:50:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:50:45,630 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) [2022-07-13 21:50:45,632 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 [2022-07-13 21:50:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-13 21:50:45,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-13 21:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:50:45,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:50:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:50:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:50:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:50:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:50:45,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:50:45,656 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:50:45,730 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:50:45,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:50:45,858 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:50:45,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:50:45,863 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 21:50:45,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:50:45 BoogieIcfgContainer [2022-07-13 21:50:45,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:50:45,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:50:45,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:50:45,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:50:45,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:50:45" (1/3) ... [2022-07-13 21:50:45,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51638235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:50:45, skipping insertion in model container [2022-07-13 21:50:45,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:50:45" (2/3) ... [2022-07-13 21:50:45,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51638235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:50:45, skipping insertion in model container [2022-07-13 21:50:45,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:50:45" (3/3) ... [2022-07-13 21:50:45,871 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2022-07-13 21:50:45,874 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:50:45,881 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:50:45,881 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:50:45,881 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:50:45,921 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:50:45,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 170 flow [2022-07-13 21:50:45,981 INFO L129 PetriNetUnfolder]: 4/93 cut-off events. [2022-07-13 21:50:45,981 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:45,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 93 events. 4/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 102 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-07-13 21:50:45,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 170 flow [2022-07-13 21:50:45,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 79 transitions, 166 flow [2022-07-13 21:50:45,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:50:45,997 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@1d24d5ac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e517a6 [2022-07-13 21:50:45,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:50:46,007 INFO L129 PetriNetUnfolder]: 3/57 cut-off events. [2022-07-13 21:50:46,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:46,013 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:46,014 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] [2022-07-13 21:50:46,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1926868283, now seen corresponding path program 1 times [2022-07-13 21:50:46,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:46,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843861781] [2022-07-13 21:50:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:46,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843861781] [2022-07-13 21:50:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843861781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:46,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:46,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:50:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647989544] [2022-07-13 21:50:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:46,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:50:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:50:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:50:46,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-13 21:50:46,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 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) [2022-07-13 21:50:46,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:46,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-13 21:50:46,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:46,618 INFO L129 PetriNetUnfolder]: 71/344 cut-off events. [2022-07-13 21:50:46,618 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:50:46,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 344 events. 71/344 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1900 event pairs, 14 based on Foata normal form. 4/311 useless extension candidates. Maximal degree in co-relation 467. Up to 38 conditions per place. [2022-07-13 21:50:46,621 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 28 selfloop transitions, 11 changer transitions 6/100 dead transitions. [2022-07-13 21:50:46,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 304 flow [2022-07-13 21:50:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:50:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:50:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 672 transitions. [2022-07-13 21:50:46,634 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2022-07-13 21:50:46,634 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 672 transitions. [2022-07-13 21:50:46,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 672 transitions. [2022-07-13 21:50:46,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:46,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 672 transitions. [2022-07-13 21:50:46,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.09090909090909) internal successors, (672), 11 states have internal predecessors, (672), 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) [2022-07-13 21:50:46,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 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) [2022-07-13 21:50:46,649 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 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) [2022-07-13 21:50:46,650 INFO L186 Difference]: Start difference. First operand has 82 places, 79 transitions, 166 flow. Second operand 11 states and 672 transitions. [2022-07-13 21:50:46,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 304 flow [2022-07-13 21:50:46,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:50:46,654 INFO L242 Difference]: Finished difference. Result has 94 places, 80 transitions, 209 flow [2022-07-13 21:50:46,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=209, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2022-07-13 21:50:46,658 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2022-07-13 21:50:46,658 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 209 flow [2022-07-13 21:50:46,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 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) [2022-07-13 21:50:46,659 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:46,659 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:50:46,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:50:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2080092778, now seen corresponding path program 1 times [2022-07-13 21:50:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836913613] [2022-07-13 21:50:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:46,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:50:46,698 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:50:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:50:46,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:50:46,772 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:50:46,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:50:46,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:50:46,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-13 21:50:46,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:50:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:50:46,776 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:50:46,777 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:50:46,777 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:50:46,791 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:50:46,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 107 places, 101 transitions, 226 flow [2022-07-13 21:50:46,801 INFO L129 PetriNetUnfolder]: 5/119 cut-off events. [2022-07-13 21:50:46,802 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:50:46,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 119 events. 5/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 147 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2022-07-13 21:50:46,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 101 transitions, 226 flow [2022-07-13 21:50:46,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 86 transitions, 187 flow [2022-07-13 21:50:46,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:50:46,805 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@1d24d5ac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e517a6 [2022-07-13 21:50:46,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:50:46,808 INFO L129 PetriNetUnfolder]: 3/58 cut-off events. [2022-07-13 21:50:46,808 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:46,808 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:46,808 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] [2022-07-13 21:50:46,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:50:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 51703260, now seen corresponding path program 1 times [2022-07-13 21:50:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085323641] [2022-07-13 21:50:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:46,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085323641] [2022-07-13 21:50:46,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085323641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:46,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:46,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:50:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169330286] [2022-07-13 21:50:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:50:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:50:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:50:46,938 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 101 [2022-07-13 21:50:46,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 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) [2022-07-13 21:50:46,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:46,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 101 [2022-07-13 21:50:46,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:47,225 INFO L129 PetriNetUnfolder]: 429/1137 cut-off events. [2022-07-13 21:50:47,226 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-13 21:50:47,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 1137 events. 429/1137 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8537 event pairs, 24 based on Foata normal form. 19/1036 useless extension candidates. Maximal degree in co-relation 1887. Up to 213 conditions per place. [2022-07-13 21:50:47,234 INFO L132 encePairwiseOnDemand]: 88/101 looper letters, 54 selfloop transitions, 14 changer transitions 6/133 dead transitions. [2022-07-13 21:50:47,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 465 flow [2022-07-13 21:50:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:50:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:50:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 855 transitions. [2022-07-13 21:50:47,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7695769576957696 [2022-07-13 21:50:47,237 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 855 transitions. [2022-07-13 21:50:47,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 855 transitions. [2022-07-13 21:50:47,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:47,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 855 transitions. [2022-07-13 21:50:47,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.72727272727273) internal successors, (855), 11 states have internal predecessors, (855), 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) [2022-07-13 21:50:47,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 101.0) internal successors, (1212), 12 states have internal predecessors, (1212), 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) [2022-07-13 21:50:47,242 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 101.0) internal successors, (1212), 12 states have internal predecessors, (1212), 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) [2022-07-13 21:50:47,242 INFO L186 Difference]: Start difference. First operand has 91 places, 86 transitions, 187 flow. Second operand 11 states and 855 transitions. [2022-07-13 21:50:47,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 465 flow [2022-07-13 21:50:47,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 462 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-13 21:50:47,247 INFO L242 Difference]: Finished difference. Result has 104 places, 91 transitions, 262 flow [2022-07-13 21:50:47,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=262, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2022-07-13 21:50:47,248 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 13 predicate places. [2022-07-13 21:50:47,248 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 262 flow [2022-07-13 21:50:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 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) [2022-07-13 21:50:47,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:47,249 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] [2022-07-13 21:50:47,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:50:47,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:50:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash -492590774, now seen corresponding path program 1 times [2022-07-13 21:50:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:47,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491608368] [2022-07-13 21:50:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:47,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491608368] [2022-07-13 21:50:47,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491608368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:47,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:47,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:50:47,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500806779] [2022-07-13 21:50:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:50:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:50:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:50:47,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2022-07-13 21:50:47,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 262 flow. Second operand has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-07-13 21:50:47,382 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:47,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2022-07-13 21:50:47,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:48,126 INFO L129 PetriNetUnfolder]: 1799/5396 cut-off events. [2022-07-13 21:50:48,126 INFO L130 PetriNetUnfolder]: For 2292/2292 co-relation queries the response was YES. [2022-07-13 21:50:48,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 5396 events. 1799/5396 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 52732 event pairs, 196 based on Foata normal form. 25/5190 useless extension candidates. Maximal degree in co-relation 10565. Up to 421 conditions per place. [2022-07-13 21:50:48,155 INFO L132 encePairwiseOnDemand]: 88/101 looper letters, 170 selfloop transitions, 81 changer transitions 17/324 dead transitions. [2022-07-13 21:50:48,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 324 transitions, 1587 flow [2022-07-13 21:50:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 21:50:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-13 21:50:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2564 transitions. [2022-07-13 21:50:48,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7466511357018055 [2022-07-13 21:50:48,161 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2564 transitions. [2022-07-13 21:50:48,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2564 transitions. [2022-07-13 21:50:48,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:48,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2564 transitions. [2022-07-13 21:50:48,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 75.41176470588235) internal successors, (2564), 34 states have internal predecessors, (2564), 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) [2022-07-13 21:50:48,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 101.0) internal successors, (3535), 35 states have internal predecessors, (3535), 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) [2022-07-13 21:50:48,200 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 101.0) internal successors, (3535), 35 states have internal predecessors, (3535), 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) [2022-07-13 21:50:48,201 INFO L186 Difference]: Start difference. First operand has 104 places, 91 transitions, 262 flow. Second operand 34 states and 2564 transitions. [2022-07-13 21:50:48,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 324 transitions, 1587 flow [2022-07-13 21:50:48,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 324 transitions, 1581 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:50:48,218 INFO L242 Difference]: Finished difference. Result has 153 places, 172 transitions, 964 flow [2022-07-13 21:50:48,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=964, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2022-07-13 21:50:48,220 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 62 predicate places. [2022-07-13 21:50:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 964 flow [2022-07-13 21:50:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-07-13 21:50:48,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:48,221 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:48,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:50:48,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:50:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1223427672, now seen corresponding path program 1 times [2022-07-13 21:50:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:48,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717902209] [2022-07-13 21:50:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:48,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:50:48,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:50:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:50:48,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:50:48,266 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:50:48,266 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:50:48,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:50:48,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-13 21:50:48,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:50:48,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:50:48,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:50:48,269 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:50:48,270 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:50:48,270 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:50:48,283 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:50:48,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 122 transitions, 286 flow [2022-07-13 21:50:48,295 INFO L129 PetriNetUnfolder]: 6/145 cut-off events. [2022-07-13 21:50:48,296 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:50:48,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 145 events. 6/145 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2022-07-13 21:50:48,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 122 transitions, 286 flow [2022-07-13 21:50:48,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 93 transitions, 210 flow [2022-07-13 21:50:48,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:50:48,302 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@1d24d5ac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e517a6 [2022-07-13 21:50:48,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:50:48,305 INFO L129 PetriNetUnfolder]: 3/56 cut-off events. [2022-07-13 21:50:48,305 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:50:48,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:48,305 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] [2022-07-13 21:50:48,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:50:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1852120139, now seen corresponding path program 1 times [2022-07-13 21:50:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:48,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458358844] [2022-07-13 21:50:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:48,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458358844] [2022-07-13 21:50:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458358844] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:48,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:48,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:50:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580899218] [2022-07-13 21:50:48,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:48,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:50:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:50:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:50:48,387 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:50:48,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 210 flow. Second operand has 9 states, 9 states have (on average 85.44444444444444) internal successors, (769), 9 states have internal predecessors, (769), 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) [2022-07-13 21:50:48,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:48,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:50:48,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:48,843 INFO L129 PetriNetUnfolder]: 2081/4514 cut-off events. [2022-07-13 21:50:48,843 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-07-13 21:50:48,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7940 conditions, 4514 events. 2081/4514 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39797 event pairs, 167 based on Foata normal form. 76/4177 useless extension candidates. Maximal degree in co-relation 7887. Up to 1142 conditions per place. [2022-07-13 21:50:48,867 INFO L132 encePairwiseOnDemand]: 108/122 looper letters, 72 selfloop transitions, 17 changer transitions 6/158 dead transitions. [2022-07-13 21:50:48,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 158 transitions, 608 flow [2022-07-13 21:50:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:50:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:50:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1030 transitions. [2022-07-13 21:50:48,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.767511177347243 [2022-07-13 21:50:48,870 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1030 transitions. [2022-07-13 21:50:48,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1030 transitions. [2022-07-13 21:50:48,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:48,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1030 transitions. [2022-07-13 21:50:48,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 93.63636363636364) internal successors, (1030), 11 states have internal predecessors, (1030), 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) [2022-07-13 21:50:48,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 122.0) internal successors, (1464), 12 states have internal predecessors, (1464), 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) [2022-07-13 21:50:48,874 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 122.0) internal successors, (1464), 12 states have internal predecessors, (1464), 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) [2022-07-13 21:50:48,874 INFO L186 Difference]: Start difference. First operand has 100 places, 93 transitions, 210 flow. Second operand 11 states and 1030 transitions. [2022-07-13 21:50:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 158 transitions, 608 flow [2022-07-13 21:50:48,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 589 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-13 21:50:48,876 INFO L242 Difference]: Finished difference. Result has 113 places, 101 transitions, 304 flow [2022-07-13 21:50:48,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2022-07-13 21:50:48,877 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 13 predicate places. [2022-07-13 21:50:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 304 flow [2022-07-13 21:50:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.44444444444444) internal successors, (769), 9 states have internal predecessors, (769), 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) [2022-07-13 21:50:48,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:48,877 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] [2022-07-13 21:50:48,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:50:48,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:50:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1166444432, now seen corresponding path program 1 times [2022-07-13 21:50:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:48,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347174456] [2022-07-13 21:50:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:48,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:48,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347174456] [2022-07-13 21:50:48,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347174456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:50:48,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:50:48,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:50:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293837577] [2022-07-13 21:50:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:50:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:50:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:50:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:50:48,938 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 122 [2022-07-13 21:50:48,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 304 flow. Second operand has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2022-07-13 21:50:48,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:48,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 122 [2022-07-13 21:50:48,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:51,047 INFO L129 PetriNetUnfolder]: 9650/22033 cut-off events. [2022-07-13 21:50:51,047 INFO L130 PetriNetUnfolder]: For 13109/13109 co-relation queries the response was YES. [2022-07-13 21:50:51,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49191 conditions, 22033 events. 9650/22033 cut-off events. For 13109/13109 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 232282 event pairs, 1378 based on Foata normal form. 95/21172 useless extension candidates. Maximal degree in co-relation 49132. Up to 3081 conditions per place. [2022-07-13 21:50:51,230 INFO L132 encePairwiseOnDemand]: 108/122 looper letters, 234 selfloop transitions, 97 changer transitions 17/408 dead transitions. [2022-07-13 21:50:51,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 408 transitions, 2179 flow [2022-07-13 21:50:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 21:50:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-13 21:50:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3116 transitions. [2022-07-13 21:50:51,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7512054001928641 [2022-07-13 21:50:51,236 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3116 transitions. [2022-07-13 21:50:51,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3116 transitions. [2022-07-13 21:50:51,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:51,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3116 transitions. [2022-07-13 21:50:51,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.6470588235294) internal successors, (3116), 34 states have internal predecessors, (3116), 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) [2022-07-13 21:50:51,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 122.0) internal successors, (4270), 35 states have internal predecessors, (4270), 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) [2022-07-13 21:50:51,250 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 122.0) internal successors, (4270), 35 states have internal predecessors, (4270), 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) [2022-07-13 21:50:51,251 INFO L186 Difference]: Start difference. First operand has 113 places, 101 transitions, 304 flow. Second operand 34 states and 3116 transitions. [2022-07-13 21:50:51,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 408 transitions, 2179 flow [2022-07-13 21:50:51,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 408 transitions, 2173 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:50:51,336 INFO L242 Difference]: Finished difference. Result has 163 places, 196 transitions, 1168 flow [2022-07-13 21:50:51,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1168, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2022-07-13 21:50:51,337 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 63 predicate places. [2022-07-13 21:50:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1168 flow [2022-07-13 21:50:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2022-07-13 21:50:51,338 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:51,338 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:51,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:50:51,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:50:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash -517292059, now seen corresponding path program 1 times [2022-07-13 21:50:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:51,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067844046] [2022-07-13 21:50:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067844046] [2022-07-13 21:50:51,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067844046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:50:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149449392] [2022-07-13 21:50:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:51,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:50:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:50:51,415 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) [2022-07-13 21:50:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:50:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 21:50:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:50:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:51,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:50:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:51,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149449392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:50:51,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:50:51,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-07-13 21:50:51,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584910248] [2022-07-13 21:50:51,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:50:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:50:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:50:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:50:51,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 122 [2022-07-13 21:50:51,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1168 flow. Second operand has 25 states, 25 states have (on average 83.32) internal successors, (2083), 25 states have internal predecessors, (2083), 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) [2022-07-13 21:50:51,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:51,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 122 [2022-07-13 21:50:51,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:50:57,035 INFO L129 PetriNetUnfolder]: 15631/36403 cut-off events. [2022-07-13 21:50:57,036 INFO L130 PetriNetUnfolder]: For 141146/141148 co-relation queries the response was YES. [2022-07-13 21:50:57,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120231 conditions, 36403 events. 15631/36403 cut-off events. For 141146/141148 co-relation queries the response was YES. Maximal size of possible extension queue 2349. Compared 424718 event pairs, 3756 based on Foata normal form. 184/36528 useless extension candidates. Maximal degree in co-relation 120150. Up to 5613 conditions per place. [2022-07-13 21:50:57,455 INFO L132 encePairwiseOnDemand]: 105/122 looper letters, 388 selfloop transitions, 330 changer transitions 28/805 dead transitions. [2022-07-13 21:50:57,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 805 transitions, 7121 flow [2022-07-13 21:50:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-13 21:50:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-13 21:50:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 5211 transitions. [2022-07-13 21:50:57,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7364330130016958 [2022-07-13 21:50:57,464 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 5211 transitions. [2022-07-13 21:50:57,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 5211 transitions. [2022-07-13 21:50:57,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:50:57,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 5211 transitions. [2022-07-13 21:50:57,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 89.84482758620689) internal successors, (5211), 58 states have internal predecessors, (5211), 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) [2022-07-13 21:50:57,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 122.0) internal successors, (7198), 59 states have internal predecessors, (7198), 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) [2022-07-13 21:50:57,484 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 122.0) internal successors, (7198), 59 states have internal predecessors, (7198), 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) [2022-07-13 21:50:57,484 INFO L186 Difference]: Start difference. First operand has 163 places, 196 transitions, 1168 flow. Second operand 58 states and 5211 transitions. [2022-07-13 21:50:57,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 805 transitions, 7121 flow [2022-07-13 21:50:58,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 805 transitions, 6863 flow, removed 128 selfloop flow, removed 1 redundant places. [2022-07-13 21:50:58,739 INFO L242 Difference]: Finished difference. Result has 237 places, 500 transitions, 4724 flow [2022-07-13 21:50:58,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=4724, PETRI_PLACES=237, PETRI_TRANSITIONS=500} [2022-07-13 21:50:58,740 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 137 predicate places. [2022-07-13 21:50:58,740 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 500 transitions, 4724 flow [2022-07-13 21:50:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.32) internal successors, (2083), 25 states have internal predecessors, (2083), 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) [2022-07-13 21:50:58,741 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:50:58,741 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:50:58,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:50:58,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:50:58,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:50:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:50:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1062080251, now seen corresponding path program 1 times [2022-07-13 21:50:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:50:58,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015373281] [2022-07-13 21:50:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:50:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:59,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:50:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015373281] [2022-07-13 21:50:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015373281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:50:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153334506] [2022-07-13 21:50:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:50:59,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:50:59,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:50:59,084 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) [2022-07-13 21:50:59,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:50:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:50:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 21:50:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:50:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:59,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:50:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:50:59,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153334506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:50:59,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:50:59,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-13 21:50:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379096659] [2022-07-13 21:50:59,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:50:59,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:50:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:50:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:50:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:50:59,514 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-13 21:50:59,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 500 transitions, 4724 flow. Second operand has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 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) [2022-07-13 21:50:59,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:50:59,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-13 21:50:59,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:18,146 INFO L129 PetriNetUnfolder]: 36015/87430 cut-off events. [2022-07-13 21:51:18,146 INFO L130 PetriNetUnfolder]: For 500250/500406 co-relation queries the response was YES. [2022-07-13 21:51:19,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330411 conditions, 87430 events. 36015/87430 cut-off events. For 500250/500406 co-relation queries the response was YES. Maximal size of possible extension queue 5234. Compared 1167776 event pairs, 4616 based on Foata normal form. 174/87549 useless extension candidates. Maximal degree in co-relation 330309. Up to 9032 conditions per place. [2022-07-13 21:51:19,749 INFO L132 encePairwiseOnDemand]: 104/122 looper letters, 1037 selfloop transitions, 1193 changer transitions 601/2889 dead transitions. [2022-07-13 21:51:19,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2889 transitions, 31657 flow [2022-07-13 21:51:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-07-13 21:51:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2022-07-13 21:51:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 21521 transitions. [2022-07-13 21:51:19,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7170798347327736 [2022-07-13 21:51:19,773 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 21521 transitions. [2022-07-13 21:51:19,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 21521 transitions. [2022-07-13 21:51:19,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:19,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 21521 transitions. [2022-07-13 21:51:19,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 87.48373983739837) internal successors, (21521), 246 states have internal predecessors, (21521), 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) [2022-07-13 21:51:19,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 122.0) internal successors, (30134), 247 states have internal predecessors, (30134), 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) [2022-07-13 21:51:19,861 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 122.0) internal successors, (30134), 247 states have internal predecessors, (30134), 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) [2022-07-13 21:51:19,862 INFO L186 Difference]: Start difference. First operand has 237 places, 500 transitions, 4724 flow. Second operand 246 states and 21521 transitions. [2022-07-13 21:51:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2889 transitions, 31657 flow [2022-07-13 21:51:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2889 transitions, 29744 flow, removed 949 selfloop flow, removed 5 redundant places. [2022-07-13 21:51:42,929 INFO L242 Difference]: Finished difference. Result has 623 places, 1481 transitions, 17685 flow [2022-07-13 21:51:42,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=17685, PETRI_PLACES=623, PETRI_TRANSITIONS=1481} [2022-07-13 21:51:42,930 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 523 predicate places. [2022-07-13 21:51:42,930 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1481 transitions, 17685 flow [2022-07-13 21:51:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 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) [2022-07-13 21:51:42,931 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:42,931 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:42,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:51:43,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 21:51:43,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:51:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash 461722973, now seen corresponding path program 2 times [2022-07-13 21:51:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358844445] [2022-07-13 21:51:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:43,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:51:43,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358844445] [2022-07-13 21:51:43,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358844445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:51:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964697607] [2022-07-13 21:51:43,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:51:43,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:51:43,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:51:43,245 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) [2022-07-13 21:51:43,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:51:43,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:51:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:51:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 21:51:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:51:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:51:43,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:51:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:51:43,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964697607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:51:43,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:51:43,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-13 21:51:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690338759] [2022-07-13 21:51:43,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:51:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:51:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:51:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:51:43,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-13 21:51:43,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1481 transitions, 17685 flow. Second operand has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 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) [2022-07-13 21:51:43,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:43,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-13 21:51:43,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand