./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/14_spin2003.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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:03:06,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:03:06,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:03:06,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:03:06,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:03:06,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:03:06,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:03:06,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:03:06,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:03:06,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:03:06,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:03:06,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:03:06,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:03:06,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:03:06,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:03:06,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:03:06,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:03:06,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:03:06,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:03:06,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:03:06,362 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:03:06,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:03:06,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:03:06,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:03:06,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:03:06,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:03:06,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:03:06,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:03:06,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:03:06,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:03:06,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:03:06,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:03:06,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:03:06,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:03:06,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:03:06,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:03:06,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:03:06,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:03:06,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:03:06,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:03:06,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:03:06,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:03:06,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:03:06,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:03:06,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:03:06,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:03:06,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:03:06,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:03:06,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:03:06,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:03:06,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:03:06,402 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:03:06,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:03:06,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:03:06,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:03:06,404 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:03:06,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:03:06,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:03:06,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:03:06,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:03:06,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:03:06,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:03:06,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:03:06,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:03:06,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:03:06,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:03:06,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:03:06,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:03:06,407 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:03:06,407 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:03:06,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:03:06,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-07-19 21:03:06,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:03:06,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:03:06,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:03:06,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:03:06,593 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:03:06,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-07-19 21:03:06,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef8883858/ce340bd9322c4f86867bcd44f3a5cfa9/FLAG6bf0d6378 [2022-07-19 21:03:07,060 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:03:07,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-07-19 21:03:07,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef8883858/ce340bd9322c4f86867bcd44f3a5cfa9/FLAG6bf0d6378 [2022-07-19 21:03:07,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef8883858/ce340bd9322c4f86867bcd44f3a5cfa9 [2022-07-19 21:03:07,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:03:07,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:03:07,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:03:07,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:03:07,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:03:07,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25269708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07, skipping insertion in model container [2022-07-19 21:03:07,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:03:07,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:03:07,362 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-ext/14_spin2003.i[30203,30216] [2022-07-19 21:03:07,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:03:07,375 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:03:07,404 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-ext/14_spin2003.i[30203,30216] [2022-07-19 21:03:07,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:03:07,430 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:03:07,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07 WrapperNode [2022-07-19 21:03:07,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:03:07,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:03:07,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:03:07,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:03:07,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,465 INFO L137 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-07-19 21:03:07,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:03:07,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:03:07,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:03:07,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:03:07,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:03:07,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:03:07,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:03:07,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:03:07,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (1/1) ... [2022-07-19 21:03:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:03:07,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:03:07,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:03:07,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:03:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:03:07,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:03:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:03:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:03:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:03:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:03:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:03:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:03:07,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:03:07,535 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:03:07,593 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:03:07,594 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:03:07,708 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:03:07,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:03:07,745 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 21:03:07,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:03:07 BoogieIcfgContainer [2022-07-19 21:03:07,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:03:07,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:03:07,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:03:07,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:03:07,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:03:07" (1/3) ... [2022-07-19 21:03:07,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409c66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:03:07, skipping insertion in model container [2022-07-19 21:03:07,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:07" (2/3) ... [2022-07-19 21:03:07,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5409c66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:03:07, skipping insertion in model container [2022-07-19 21:03:07,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:03:07" (3/3) ... [2022-07-19 21:03:07,762 INFO L111 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-07-19 21:03:07,766 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:03:07,772 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:03:07,772 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:03:07,772 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:03:07,794 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:07,815 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-07-19 21:03:07,837 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-19 21:03:07,838 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:03:07,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-07-19 21:03:07,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 89 flow [2022-07-19 21:03:07,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 89 flow [2022-07-19 21:03:07,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:07,854 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:07,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:03:07,862 INFO L129 PetriNetUnfolder]: 3/45 cut-off events. [2022-07-19 21:03:07,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:03:07,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:07,863 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] [2022-07-19 21:03:07,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:03:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash 420207741, now seen corresponding path program 1 times [2022-07-19 21:03:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333119537] [2022-07-19 21:03:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333119537] [2022-07-19 21:03:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333119537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:08,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:08,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232312663] [2022-07-19 21:03:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:08,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:08,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:08,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 42 [2022-07-19 21:03:08,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:08,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 42 [2022-07-19 21:03:08,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:08,162 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2022-07-19 21:03:08,162 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:03:08,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 0/35 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 6/41 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-19 21:03:08,163 INFO L132 encePairwiseOnDemand]: 36/42 looper letters, 4 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2022-07-19 21:03:08,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 81 flow [2022-07-19 21:03:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2022-07-19 21:03:08,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-07-19 21:03:08,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2022-07-19 21:03:08,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2022-07-19 21:03:08,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:08,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2022-07-19 21:03:08,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,195 INFO L186 Difference]: Start difference. First operand has 43 places, 42 transitions, 89 flow. Second operand 3 states and 102 transitions. [2022-07-19 21:03:08,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 81 flow [2022-07-19 21:03:08,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 81 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:08,198 INFO L242 Difference]: Finished difference. Result has 36 places, 31 transitions, 73 flow [2022-07-19 21:03:08,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-07-19 21:03:08,202 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2022-07-19 21:03:08,202 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 73 flow [2022-07-19 21:03:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,203 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] [2022-07-19 21:03:08,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:03:08,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:03:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1612868083, now seen corresponding path program 1 times [2022-07-19 21:03:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396508281] [2022-07-19 21:03:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,221 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,247 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:08,248 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:08,249 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:03:08,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:03:08,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:03:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:03:08,251 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:03:08,253 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:08,254 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:03:08,279 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:08,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-07-19 21:03:08,300 INFO L129 PetriNetUnfolder]: 5/79 cut-off events. [2022-07-19 21:03:08,301 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:03:08,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-07-19 21:03:08,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-07-19 21:03:08,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-07-19 21:03:08,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:08,307 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:08,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:03:08,323 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-19 21:03:08,325 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:03:08,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,325 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] [2022-07-19 21:03:08,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:03:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1019138409, now seen corresponding path program 1 times [2022-07-19 21:03:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971311539] [2022-07-19 21:03:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:08,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:08,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971311539] [2022-07-19 21:03:08,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971311539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:08,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:08,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049688489] [2022-07-19 21:03:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:08,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 55 [2022-07-19 21:03:08,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:08,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 55 [2022-07-19 21:03:08,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:08,471 INFO L129 PetriNetUnfolder]: 34/156 cut-off events. [2022-07-19 21:03:08,472 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:03:08,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 156 events. 34/156 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 556 event pairs, 13 based on Foata normal form. 65/216 useless extension candidates. Maximal degree in co-relation 116. Up to 69 conditions per place. [2022-07-19 21:03:08,475 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 21 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2022-07-19 21:03:08,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 179 flow [2022-07-19 21:03:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2022-07-19 21:03:08,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-19 21:03:08,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 138 transitions. [2022-07-19 21:03:08,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 138 transitions. [2022-07-19 21:03:08,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:08,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 138 transitions. [2022-07-19 21:03:08,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,484 INFO L186 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 3 states and 138 transitions. [2022-07-19 21:03:08,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 179 flow [2022-07-19 21:03:08,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 177 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:08,489 INFO L242 Difference]: Finished difference. Result has 53 places, 48 transitions, 138 flow [2022-07-19 21:03:08,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2022-07-19 21:03:08,490 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-07-19 21:03:08,490 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 138 flow [2022-07-19 21:03:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,491 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:08,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:03:08,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:03:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -170461533, now seen corresponding path program 1 times [2022-07-19 21:03:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048031108] [2022-07-19 21:03:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,528 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:08,547 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:08,547 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:03:08,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:03:08,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:03:08,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:03:08,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:03:08,548 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:03:08,549 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:08,549 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:03:08,562 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:08,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-07-19 21:03:08,579 INFO L129 PetriNetUnfolder]: 7/105 cut-off events. [2022-07-19 21:03:08,579 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:03:08,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 199 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-07-19 21:03:08,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 68 transitions, 157 flow [2022-07-19 21:03:08,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 68 transitions, 157 flow [2022-07-19 21:03:08,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:08,585 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:08,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:03:08,587 INFO L129 PetriNetUnfolder]: 2/43 cut-off events. [2022-07-19 21:03:08,588 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:03:08,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,588 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:08,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:03:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash -181385483, now seen corresponding path program 1 times [2022-07-19 21:03:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6324370] [2022-07-19 21:03:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6324370] [2022-07-19 21:03:08,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6324370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:08,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:08,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:08,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52577007] [2022-07-19 21:03:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:08,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:08,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 68 [2022-07-19 21:03:08,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:08,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 68 [2022-07-19 21:03:08,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:08,828 INFO L129 PetriNetUnfolder]: 627/1384 cut-off events. [2022-07-19 21:03:08,828 INFO L130 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2022-07-19 21:03:08,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 1384 events. 627/1384 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8862 event pairs, 258 based on Foata normal form. 614/1933 useless extension candidates. Maximal degree in co-relation 1329. Up to 757 conditions per place. [2022-07-19 21:03:08,837 INFO L132 encePairwiseOnDemand]: 53/68 looper letters, 32 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-07-19 21:03:08,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 255 flow [2022-07-19 21:03:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2022-07-19 21:03:08,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137254901960784 [2022-07-19 21:03:08,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2022-07-19 21:03:08,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2022-07-19 21:03:08,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:08,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2022-07-19 21:03:08,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,840 INFO L186 Difference]: Start difference. First operand has 71 places, 68 transitions, 157 flow. Second operand 3 states and 166 transitions. [2022-07-19 21:03:08,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 255 flow [2022-07-19 21:03:08,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 247 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:08,842 INFO L242 Difference]: Finished difference. Result has 66 places, 61 transitions, 183 flow [2022-07-19 21:03:08,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2022-07-19 21:03:08,842 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2022-07-19 21:03:08,843 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 183 flow [2022-07-19 21:03:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,843 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,843 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] [2022-07-19 21:03:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:03:08,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:03:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1585935522, now seen corresponding path program 1 times [2022-07-19 21:03:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688120992] [2022-07-19 21:03:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:08,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688120992] [2022-07-19 21:03:08,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688120992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:08,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:08,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:08,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966545699] [2022-07-19 21:03:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:08,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:08,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 68 [2022-07-19 21:03:08,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:08,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 68 [2022-07-19 21:03:08,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:08,904 INFO L129 PetriNetUnfolder]: 15/160 cut-off events. [2022-07-19 21:03:08,905 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-19 21:03:08,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 160 events. 15/160 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 537 event pairs, 10 based on Foata normal form. 14/173 useless extension candidates. Maximal degree in co-relation 253. Up to 26 conditions per place. [2022-07-19 21:03:08,905 INFO L132 encePairwiseOnDemand]: 62/68 looper letters, 6 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-07-19 21:03:08,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 179 flow [2022-07-19 21:03:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2022-07-19 21:03:08,907 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8088235294117647 [2022-07-19 21:03:08,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2022-07-19 21:03:08,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2022-07-19 21:03:08,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:08,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2022-07-19 21:03:08,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,909 INFO L186 Difference]: Start difference. First operand has 66 places, 61 transitions, 183 flow. Second operand 3 states and 165 transitions. [2022-07-19 21:03:08,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 179 flow [2022-07-19 21:03:08,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:03:08,911 INFO L242 Difference]: Finished difference. Result has 58 places, 49 transitions, 125 flow [2022-07-19 21:03:08,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-07-19 21:03:08,912 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2022-07-19 21:03:08,912 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 125 flow [2022-07-19 21:03:08,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:08,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,912 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:03:08,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:03:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash -511346355, now seen corresponding path program 1 times [2022-07-19 21:03:08,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807092970] [2022-07-19 21:03:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,925 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:08,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:08,938 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:08,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:03:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:03:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:03:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:03:08,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:03:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:03:08,939 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:03:08,940 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:08,940 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:03:08,959 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:08,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-07-19 21:03:08,971 INFO L129 PetriNetUnfolder]: 9/131 cut-off events. [2022-07-19 21:03:08,972 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:03:08,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-07-19 21:03:08,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 194 flow [2022-07-19 21:03:08,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 81 transitions, 194 flow [2022-07-19 21:03:08,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:08,979 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:08,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:03:08,983 INFO L129 PetriNetUnfolder]: 3/46 cut-off events. [2022-07-19 21:03:08,983 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:03:08,984 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:08,984 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] [2022-07-19 21:03:08,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:08,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1823606305, now seen corresponding path program 1 times [2022-07-19 21:03:08,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801581383] [2022-07-19 21:03:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:08,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:09,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:09,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801581383] [2022-07-19 21:03:09,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801581383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:09,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:09,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316135861] [2022-07-19 21:03:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:09,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:09,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:09,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-07-19 21:03:09,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:09,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-07-19 21:03:09,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:10,032 INFO L129 PetriNetUnfolder]: 7843/13496 cut-off events. [2022-07-19 21:03:10,032 INFO L130 PetriNetUnfolder]: For 4465/4465 co-relation queries the response was YES. [2022-07-19 21:03:10,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27376 conditions, 13496 events. 7843/13496 cut-off events. For 4465/4465 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 108072 event pairs, 4364 based on Foata normal form. 5503/18417 useless extension candidates. Maximal degree in co-relation 21779. Up to 7424 conditions per place. [2022-07-19 21:03:10,184 INFO L132 encePairwiseOnDemand]: 62/81 looper letters, 43 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2022-07-19 21:03:10,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 335 flow [2022-07-19 21:03:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-07-19 21:03:10,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2022-07-19 21:03:10,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:10,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,188 INFO L186 Difference]: Start difference. First operand has 85 places, 81 transitions, 194 flow. Second operand 3 states and 194 transitions. [2022-07-19 21:03:10,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 335 flow [2022-07-19 21:03:10,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 317 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:10,192 INFO L242 Difference]: Finished difference. Result has 79 places, 74 transitions, 228 flow [2022-07-19 21:03:10,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2022-07-19 21:03:10,193 INFO L279 CegarLoopForPetriNet]: 85 programPoint places, -6 predicate places. [2022-07-19 21:03:10,193 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 228 flow [2022-07-19 21:03:10,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:10,193 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] [2022-07-19 21:03:10,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:03:10,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:10,194 INFO L85 PathProgramCache]: Analyzing trace with hash 643974404, now seen corresponding path program 1 times [2022-07-19 21:03:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053636921] [2022-07-19 21:03:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:03:10,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053636921] [2022-07-19 21:03:10,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053636921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:10,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:10,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:10,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394842977] [2022-07-19 21:03:10,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:10,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2022-07-19 21:03:10,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:10,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2022-07-19 21:03:10,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:10,276 INFO L129 PetriNetUnfolder]: 51/404 cut-off events. [2022-07-19 21:03:10,276 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-19 21:03:10,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 404 events. 51/404 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2269 event pairs, 18 based on Foata normal form. 62/466 useless extension candidates. Maximal degree in co-relation 439. Up to 66 conditions per place. [2022-07-19 21:03:10,278 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 8 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2022-07-19 21:03:10,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 225 flow [2022-07-19 21:03:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2022-07-19 21:03:10,279 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983539094650206 [2022-07-19 21:03:10,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:10,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2022-07-19 21:03:10,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,280 INFO L186 Difference]: Start difference. First operand has 79 places, 74 transitions, 228 flow. Second operand 3 states and 194 transitions. [2022-07-19 21:03:10,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 61 transitions, 225 flow [2022-07-19 21:03:10,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 189 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:03:10,287 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 152 flow [2022-07-19 21:03:10,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-07-19 21:03:10,289 INFO L279 CegarLoopForPetriNet]: 85 programPoint places, -16 predicate places. [2022-07-19 21:03:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 152 flow [2022-07-19 21:03:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,289 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:10,290 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:03:10,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 604232154, now seen corresponding path program 1 times [2022-07-19 21:03:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822304590] [2022-07-19 21:03:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:10,312 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:10,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:10,326 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:03:10,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:03:10,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:03:10,328 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:03:10,328 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:10,329 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:03:10,347 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:10,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-07-19 21:03:10,357 INFO L129 PetriNetUnfolder]: 11/157 cut-off events. [2022-07-19 21:03:10,358 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:03:10,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 305 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-07-19 21:03:10,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 233 flow [2022-07-19 21:03:10,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 94 transitions, 233 flow [2022-07-19 21:03:10,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:10,361 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:10,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:03:10,362 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-19 21:03:10,362 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:03:10,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:10,363 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] [2022-07-19 21:03:10,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1674142061, now seen corresponding path program 1 times [2022-07-19 21:03:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955958507] [2022-07-19 21:03:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955958507] [2022-07-19 21:03:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955958507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:10,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603350269] [2022-07-19 21:03:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:10,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 94 [2022-07-19 21:03:10,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:10,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:10,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 94 [2022-07-19 21:03:10,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:18,569 INFO L129 PetriNetUnfolder]: 82238/124956 cut-off events. [2022-07-19 21:03:18,570 INFO L130 PetriNetUnfolder]: For 53459/53459 co-relation queries the response was YES. [2022-07-19 21:03:19,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257675 conditions, 124956 events. 82238/124956 cut-off events. For 53459/53459 co-relation queries the response was YES. Maximal size of possible extension queue 5112. Compared 1097890 event pairs, 45221 based on Foata normal form. 46598/165414 useless extension candidates. Maximal degree in co-relation 204173. Up to 67130 conditions per place. [2022-07-19 21:03:19,851 INFO L132 encePairwiseOnDemand]: 71/94 looper letters, 54 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2022-07-19 21:03:19,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 419 flow [2022-07-19 21:03:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-07-19 21:03:19,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7872340425531915 [2022-07-19 21:03:19,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-07-19 21:03:19,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-07-19 21:03:19,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:19,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-07-19 21:03:19,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:19,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:19,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:19,857 INFO L186 Difference]: Start difference. First operand has 99 places, 94 transitions, 233 flow. Second operand 3 states and 222 transitions. [2022-07-19 21:03:19,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 419 flow [2022-07-19 21:03:19,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 106 transitions, 387 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:19,876 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 273 flow [2022-07-19 21:03:19,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-07-19 21:03:19,877 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-07-19 21:03:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 273 flow [2022-07-19 21:03:19,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:19,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:19,878 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] [2022-07-19 21:03:19,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:03:19,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1709019936, now seen corresponding path program 1 times [2022-07-19 21:03:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803912776] [2022-07-19 21:03:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:19,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:03:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803912776] [2022-07-19 21:03:19,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803912776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:19,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:19,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:19,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086746565] [2022-07-19 21:03:19,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:19,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:19,907 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 94 [2022-07-19 21:03:19,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:19,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:19,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 94 [2022-07-19 21:03:19,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:19,992 INFO L129 PetriNetUnfolder]: 147/938 cut-off events. [2022-07-19 21:03:19,992 INFO L130 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2022-07-19 21:03:19,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 938 events. 147/938 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7056 event pairs, 69 based on Foata normal form. 222/1160 useless extension candidates. Maximal degree in co-relation 1132. Up to 178 conditions per place. [2022-07-19 21:03:19,997 INFO L132 encePairwiseOnDemand]: 84/94 looper letters, 10 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-07-19 21:03:19,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 271 flow [2022-07-19 21:03:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-07-19 21:03:19,998 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7907801418439716 [2022-07-19 21:03:19,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-07-19 21:03:19,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-07-19 21:03:19,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:19,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-07-19 21:03:19,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:20,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:20,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:20,000 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 273 flow. Second operand 3 states and 223 transitions. [2022-07-19 21:03:20,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 271 flow [2022-07-19 21:03:20,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 227 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:03:20,004 INFO L242 Difference]: Finished difference. Result has 80 places, 67 transitions, 179 flow [2022-07-19 21:03:20,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2022-07-19 21:03:20,006 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -19 predicate places. [2022-07-19 21:03:20,006 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 179 flow [2022-07-19 21:03:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:20,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:20,007 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:03:20,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1387139045, now seen corresponding path program 1 times [2022-07-19 21:03:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:20,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116147153] [2022-07-19 21:03:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:20,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:20,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:20,051 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-19 21:03:20,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:03:20,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:03:20,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:03:20,052 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:03:20,052 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:20,052 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:03:20,073 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:20,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-07-19 21:03:20,087 INFO L129 PetriNetUnfolder]: 13/183 cut-off events. [2022-07-19 21:03:20,088 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:03:20,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 374 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-07-19 21:03:20,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 274 flow [2022-07-19 21:03:20,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 107 transitions, 274 flow [2022-07-19 21:03:20,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:20,092 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@7b0e923b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37d2135a [2022-07-19 21:03:20,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-19 21:03:20,094 INFO L129 PetriNetUnfolder]: 2/44 cut-off events. [2022-07-19 21:03:20,094 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:03:20,094 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:20,094 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] [2022-07-19 21:03:20,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash 435226201, now seen corresponding path program 1 times [2022-07-19 21:03:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:20,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897520384] [2022-07-19 21:03:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:20,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:20,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897520384] [2022-07-19 21:03:20,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897520384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:20,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:20,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:20,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479186115] [2022-07-19 21:03:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:20,121 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 107 [2022-07-19 21:03:20,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:20,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:20,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 107 [2022-07-19 21:03:20,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand