./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.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 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:01:31,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:01:31,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:01:31,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:01:31,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:01:31,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:01:31,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:01:31,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:01:31,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:01:31,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:01:31,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:01:31,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:01:31,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:01:31,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:01:31,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:01:31,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:01:31,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:01:31,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:01:31,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:01:31,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:01:31,248 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:01:31,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:01:31,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:01:31,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:01:31,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:01:31,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:01:31,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:01:31,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:01:31,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:01:31,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:01:31,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:01:31,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:01:31,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:01:31,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:01:31,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:01:31,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:01:31,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:01:31,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:01:31,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:01:31,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:01:31,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:01:31,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:01:31,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:01:31,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:01:31,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:01:31,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:01:31,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:01:31,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:01:31,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:01:31,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:01:31,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:01:31,305 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:01:31,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:01:31,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:01:31,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:01:31,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:01:31,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:01:31,309 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:01:31,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:01:31,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:01:31,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:01:31,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:01:31,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:01:31,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:01:31,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:01:31,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:01:31,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:01:31,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:01:31,312 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:01:31,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:01:31,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:01:31,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb [2022-07-12 10:01:31,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:01:31,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:01:31,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:01:31,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:01:31,573 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:01:31,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-12 10:01:31,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ba628c32/ba9ee7912fd441a7b792627c6727dc0c/FLAG68258f44e [2022-07-12 10:01:32,154 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:01:32,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-12 10:01:32,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ba628c32/ba9ee7912fd441a7b792627c6727dc0c/FLAG68258f44e [2022-07-12 10:01:32,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ba628c32/ba9ee7912fd441a7b792627c6727dc0c [2022-07-12 10:01:32,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:01:32,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:01:32,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:01:32,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:01:32,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:01:32,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7986bfa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32, skipping insertion in model container [2022-07-12 10:01:32,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:01:32,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:01:32,829 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/12_fmaxsymopt_cas.i[30582,30595] [2022-07-12 10:01:32,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:01:32,852 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:01:32,905 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/12_fmaxsymopt_cas.i[30582,30595] [2022-07-12 10:01:32,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:01:32,937 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:01:32,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32 WrapperNode [2022-07-12 10:01:32,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:01:32,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:01:32,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:01:32,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:01:32,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,989 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2022-07-12 10:01:32,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:01:32,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:01:32,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:01:32,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:01:32,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:32,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:01:33,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:01:33,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:01:33,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:01:33,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (1/1) ... [2022-07-12 10:01:33,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:01:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:01:33,065 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) [2022-07-12 10:01:33,071 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 [2022-07-12 10:01:33,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:01:33,111 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:01:33,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:01:33,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:01:33,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:01:33,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:01:33,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:01:33,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:01:33,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:01:33,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:01:33,114 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:01:33,252 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:01:33,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:01:33,524 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:01:33,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:01:33,583 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:01:33,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:01:33 BoogieIcfgContainer [2022-07-12 10:01:33,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:01:33,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:01:33,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:01:33,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:01:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:01:32" (1/3) ... [2022-07-12 10:01:33,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430df587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:01:33, skipping insertion in model container [2022-07-12 10:01:33,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:01:32" (2/3) ... [2022-07-12 10:01:33,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430df587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:01:33, skipping insertion in model container [2022-07-12 10:01:33,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:01:33" (3/3) ... [2022-07-12 10:01:33,597 INFO L111 eAbstractionObserver]: Analyzing ICFG 12_fmaxsymopt_cas.i [2022-07-12 10:01:33,604 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:01:33,613 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:01:33,614 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:01:33,614 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:01:33,711 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:33,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 102 transitions, 209 flow [2022-07-12 10:01:33,812 INFO L129 PetriNetUnfolder]: 12/113 cut-off events. [2022-07-12 10:01:33,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:01:33,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 12/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-07-12 10:01:33,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 102 transitions, 209 flow [2022-07-12 10:01:33,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 102 transitions, 209 flow [2022-07-12 10:01:33,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:33,851 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:33,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:01:33,876 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-12 10:01:33,877 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:01:33,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:33,879 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] [2022-07-12 10:01:33,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:01:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1635953085, now seen corresponding path program 1 times [2022-07-12 10:01:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:33,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210728416] [2022-07-12 10:01:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:33,992 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:34,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:34,039 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:34,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-12 10:01:34,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-12 10:01:34,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-12 10:01:34,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:01:34,044 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:01:34,047 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:34,047 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:01:34,080 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:34,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 166 transitions, 344 flow [2022-07-12 10:01:34,131 INFO L129 PetriNetUnfolder]: 23/190 cut-off events. [2022-07-12 10:01:34,131 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:01:34,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 190 events. 23/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 408 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2022-07-12 10:01:34,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 166 transitions, 344 flow [2022-07-12 10:01:34,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 166 transitions, 344 flow [2022-07-12 10:01:34,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:34,139 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:34,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:01:34,150 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-07-12 10:01:34,151 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:01:34,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:34,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:34,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-12 10:01:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -32075274, now seen corresponding path program 1 times [2022-07-12 10:01:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281613578] [2022-07-12 10:01:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:34,188 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:34,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:34,227 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:34,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-12 10:01:34,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-12 10:01:34,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-12 10:01:34,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-12 10:01:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:01:34,228 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:01:34,229 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:34,229 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:01:34,281 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:34,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 230 transitions, 481 flow [2022-07-12 10:01:34,343 INFO L129 PetriNetUnfolder]: 34/267 cut-off events. [2022-07-12 10:01:34,343 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:01:34,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 34/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 750 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 202. Up to 8 conditions per place. [2022-07-12 10:01:34,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 230 transitions, 481 flow [2022-07-12 10:01:34,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 230 transitions, 481 flow [2022-07-12 10:01:34,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:34,365 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:34,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:01:34,386 INFO L129 PetriNetUnfolder]: 8/125 cut-off events. [2022-07-12 10:01:34,387 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:01:34,387 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:34,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:34,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-12 10:01:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1459620510, now seen corresponding path program 1 times [2022-07-12 10:01:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655252730] [2022-07-12 10:01:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:34,434 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:34,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:34,490 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:34,490 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-12 10:01:34,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-12 10:01:34,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-12 10:01:34,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-12 10:01:34,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-12 10:01:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:01:34,492 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 10:01:34,493 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:34,493 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:01:34,533 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:34,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 262 places, 294 transitions, 620 flow [2022-07-12 10:01:34,590 INFO L129 PetriNetUnfolder]: 45/344 cut-off events. [2022-07-12 10:01:34,591 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:01:34,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 344 events. 45/344 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1120 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 275. Up to 10 conditions per place. [2022-07-12 10:01:34,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 294 transitions, 620 flow [2022-07-12 10:01:34,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 294 transitions, 620 flow [2022-07-12 10:01:34,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:34,605 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:34,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:01:34,621 INFO L129 PetriNetUnfolder]: 14/175 cut-off events. [2022-07-12 10:01:34,621 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:01:34,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:34,622 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:34,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:01:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash 688159959, now seen corresponding path program 1 times [2022-07-12 10:01:34,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:34,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615067549] [2022-07-12 10:01:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:34,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615067549] [2022-07-12 10:01:34,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615067549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:34,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:34,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:01:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928116870] [2022-07-12 10:01:34,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:01:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:01:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:01:34,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 294 [2022-07-12 10:01:34,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 294 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 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) [2022-07-12 10:01:34,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:34,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 294 [2022-07-12 10:01:34,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:35,071 INFO L129 PetriNetUnfolder]: 109/1030 cut-off events. [2022-07-12 10:01:35,071 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-12 10:01:35,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1030 events. 109/1030 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 34 based on Foata normal form. 188/1102 useless extension candidates. Maximal degree in co-relation 539. Up to 65 conditions per place. [2022-07-12 10:01:35,092 INFO L132 encePairwiseOnDemand]: 272/294 looper letters, 8 selfloop transitions, 0 changer transitions 0/263 dead transitions. [2022-07-12 10:01:35,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 263 transitions, 574 flow [2022-07-12 10:01:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:01:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:01:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 550 transitions. [2022-07-12 10:01:35,112 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.935374149659864 [2022-07-12 10:01:35,113 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 550 transitions. [2022-07-12 10:01:35,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 550 transitions. [2022-07-12 10:01:35,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:35,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 550 transitions. [2022-07-12 10:01:35,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 275.0) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:01:35,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 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) [2022-07-12 10:01:35,135 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 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) [2022-07-12 10:01:35,137 INFO L186 Difference]: Start difference. First operand has 262 places, 294 transitions, 620 flow. Second operand 2 states and 550 transitions. [2022-07-12 10:01:35,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 263 transitions, 574 flow [2022-07-12 10:01:35,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 263 transitions, 562 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:35,155 INFO L242 Difference]: Finished difference. Result has 253 places, 263 transitions, 546 flow [2022-07-12 10:01:35,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=546, PETRI_PLACES=253, PETRI_TRANSITIONS=263} [2022-07-12 10:01:35,161 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -9 predicate places. [2022-07-12 10:01:35,161 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 263 transitions, 546 flow [2022-07-12 10:01:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 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) [2022-07-12 10:01:35,162 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:35,162 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:35,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:01:35,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-12 10:01:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 833454973, now seen corresponding path program 1 times [2022-07-12 10:01:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:35,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829882027] [2022-07-12 10:01:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829882027] [2022-07-12 10:01:35,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829882027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:35,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:35,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134611483] [2022-07-12 10:01:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:35,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:35,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:35,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 294 [2022-07-12 10:01:35,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 263 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 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) [2022-07-12 10:01:35,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:35,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 294 [2022-07-12 10:01:35,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:36,023 INFO L129 PetriNetUnfolder]: 687/3642 cut-off events. [2022-07-12 10:01:36,024 INFO L130 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-07-12 10:01:36,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4781 conditions, 3642 events. 687/3642 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 32395 event pairs, 250 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 4774. Up to 439 conditions per place. [2022-07-12 10:01:36,134 INFO L132 encePairwiseOnDemand]: 290/294 looper letters, 29 selfloop transitions, 3 changer transitions 0/274 dead transitions. [2022-07-12 10:01:36,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 274 transitions, 647 flow [2022-07-12 10:01:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2022-07-12 10:01:36,138 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8775510204081632 [2022-07-12 10:01:36,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2022-07-12 10:01:36,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2022-07-12 10:01:36,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:36,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2022-07-12 10:01:36,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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) [2022-07-12 10:01:36,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2022-07-12 10:01:36,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 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) [2022-07-12 10:01:36,144 INFO L186 Difference]: Start difference. First operand has 253 places, 263 transitions, 546 flow. Second operand 3 states and 774 transitions. [2022-07-12 10:01:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 274 transitions, 647 flow [2022-07-12 10:01:36,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 274 transitions, 647 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:36,157 INFO L242 Difference]: Finished difference. Result has 256 places, 263 transitions, 557 flow [2022-07-12 10:01:36,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=557, PETRI_PLACES=256, PETRI_TRANSITIONS=263} [2022-07-12 10:01:36,159 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -6 predicate places. [2022-07-12 10:01:36,160 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 263 transitions, 557 flow [2022-07-12 10:01:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 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) [2022-07-12 10:01:36,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:36,161 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:36,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:01:36,162 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)] === [2022-07-12 10:01:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 908884319, now seen corresponding path program 1 times [2022-07-12 10:01:36,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:36,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286915221] [2022-07-12 10:01:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:36,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:36,208 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:36,242 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:36,246 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:36,247 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-12 10:01:36,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-12 10:01:36,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-12 10:01:36,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-12 10:01:36,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-12 10:01:36,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-12 10:01:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:01:36,250 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:01:36,251 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:36,252 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:01:36,312 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:36,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 318 places, 358 transitions, 761 flow [2022-07-12 10:01:36,385 INFO L129 PetriNetUnfolder]: 56/421 cut-off events. [2022-07-12 10:01:36,385 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:01:36,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 421 events. 56/421 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1511 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 357. Up to 12 conditions per place. [2022-07-12 10:01:36,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 358 transitions, 761 flow [2022-07-12 10:01:36,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 358 transitions, 761 flow [2022-07-12 10:01:36,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:36,403 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:36,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:01:36,416 INFO L129 PetriNetUnfolder]: 14/170 cut-off events. [2022-07-12 10:01:36,417 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:01:36,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:36,417 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:36,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:01:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash -492306787, now seen corresponding path program 1 times [2022-07-12 10:01:36,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196515228] [2022-07-12 10:01:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:36,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:36,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196515228] [2022-07-12 10:01:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196515228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:36,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:36,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:01:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775784416] [2022-07-12 10:01:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:36,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:01:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:01:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:01:36,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 358 [2022-07-12 10:01:36,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 761 flow. Second operand has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 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) [2022-07-12 10:01:36,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:36,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 358 [2022-07-12 10:01:36,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:37,002 INFO L129 PetriNetUnfolder]: 253/2126 cut-off events. [2022-07-12 10:01:37,002 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-12 10:01:37,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 2126 events. 253/2126 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 15367 event pairs, 98 based on Foata normal form. 492/2376 useless extension candidates. Maximal degree in co-relation 1191. Up to 161 conditions per place. [2022-07-12 10:01:37,053 INFO L132 encePairwiseOnDemand]: 331/358 looper letters, 10 selfloop transitions, 0 changer transitions 0/321 dead transitions. [2022-07-12 10:01:37,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 321 transitions, 707 flow [2022-07-12 10:01:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:01:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:01:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2022-07-12 10:01:37,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9343575418994413 [2022-07-12 10:01:37,056 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2022-07-12 10:01:37,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2022-07-12 10:01:37,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:37,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2022-07-12 10:01:37,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 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) [2022-07-12 10:01:37,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 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) [2022-07-12 10:01:37,061 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 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) [2022-07-12 10:01:37,061 INFO L186 Difference]: Start difference. First operand has 318 places, 358 transitions, 761 flow. Second operand 2 states and 669 transitions. [2022-07-12 10:01:37,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 321 transitions, 707 flow [2022-07-12 10:01:37,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 321 transitions, 687 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:37,070 INFO L242 Difference]: Finished difference. Result has 308 places, 321 transitions, 667 flow [2022-07-12 10:01:37,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=667, PETRI_PLACES=308, PETRI_TRANSITIONS=321} [2022-07-12 10:01:37,072 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -10 predicate places. [2022-07-12 10:01:37,072 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 321 transitions, 667 flow [2022-07-12 10:01:37,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 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) [2022-07-12 10:01:37,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:37,073 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:01:37,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:01:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1429904641, now seen corresponding path program 1 times [2022-07-12 10:01:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960249113] [2022-07-12 10:01:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:37,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960249113] [2022-07-12 10:01:37,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960249113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:37,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:37,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:37,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011738823] [2022-07-12 10:01:37,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:37,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:37,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:37,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:37,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-12 10:01:37,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 321 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 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) [2022-07-12 10:01:37,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:37,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-12 10:01:37,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:39,302 INFO L129 PetriNetUnfolder]: 1833/9586 cut-off events. [2022-07-12 10:01:39,302 INFO L130 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2022-07-12 10:01:39,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12242 conditions, 9586 events. 1833/9586 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 104876 event pairs, 674 based on Foata normal form. 0/8263 useless extension candidates. Maximal degree in co-relation 12234. Up to 1071 conditions per place. [2022-07-12 10:01:39,556 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 33 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-12 10:01:39,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 334 transitions, 785 flow [2022-07-12 10:01:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 946 transitions. [2022-07-12 10:01:39,560 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8808193668528864 [2022-07-12 10:01:39,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 946 transitions. [2022-07-12 10:01:39,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 946 transitions. [2022-07-12 10:01:39,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:39,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 946 transitions. [2022-07-12 10:01:39,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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) [2022-07-12 10:01:39,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:39,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:39,567 INFO L186 Difference]: Start difference. First operand has 308 places, 321 transitions, 667 flow. Second operand 3 states and 946 transitions. [2022-07-12 10:01:39,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 334 transitions, 785 flow [2022-07-12 10:01:39,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 334 transitions, 785 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:39,574 INFO L242 Difference]: Finished difference. Result has 311 places, 321 transitions, 678 flow [2022-07-12 10:01:39,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=678, PETRI_PLACES=311, PETRI_TRANSITIONS=321} [2022-07-12 10:01:39,576 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -7 predicate places. [2022-07-12 10:01:39,576 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 321 transitions, 678 flow [2022-07-12 10:01:39,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 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) [2022-07-12 10:01:39,577 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:39,577 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:39,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:01:39,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:01:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1487906071, now seen corresponding path program 1 times [2022-07-12 10:01:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:39,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359574311] [2022-07-12 10:01:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:39,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359574311] [2022-07-12 10:01:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359574311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:39,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258776232] [2022-07-12 10:01:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:39,628 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 358 [2022-07-12 10:01:39,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 321 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 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) [2022-07-12 10:01:39,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:39,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 358 [2022-07-12 10:01:39,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:41,291 INFO L129 PetriNetUnfolder]: 1379/7043 cut-off events. [2022-07-12 10:01:41,292 INFO L130 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2022-07-12 10:01:41,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 7043 events. 1379/7043 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 72084 event pairs, 610 based on Foata normal form. 0/6177 useless extension candidates. Maximal degree in co-relation 9275. Up to 952 conditions per place. [2022-07-12 10:01:41,481 INFO L132 encePairwiseOnDemand]: 355/358 looper letters, 29 selfloop transitions, 2 changer transitions 0/333 dead transitions. [2022-07-12 10:01:41,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 333 transitions, 784 flow [2022-07-12 10:01:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-07-12 10:01:41,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8873370577281192 [2022-07-12 10:01:41,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-07-12 10:01:41,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-07-12 10:01:41,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:41,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-07-12 10:01:41,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 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) [2022-07-12 10:01:41,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:41,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:41,493 INFO L186 Difference]: Start difference. First operand has 311 places, 321 transitions, 678 flow. Second operand 3 states and 953 transitions. [2022-07-12 10:01:41,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 333 transitions, 784 flow [2022-07-12 10:01:41,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 333 transitions, 781 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:01:41,504 INFO L242 Difference]: Finished difference. Result has 313 places, 322 transitions, 687 flow [2022-07-12 10:01:41,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=313, PETRI_TRANSITIONS=322} [2022-07-12 10:01:41,507 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-07-12 10:01:41,507 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 322 transitions, 687 flow [2022-07-12 10:01:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 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) [2022-07-12 10:01:41,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:41,509 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:01:41,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:01:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1969543966, now seen corresponding path program 1 times [2022-07-12 10:01:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013229780] [2022-07-12 10:01:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:01:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013229780] [2022-07-12 10:01:41,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013229780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:41,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:41,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:41,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177961934] [2022-07-12 10:01:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:41,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:41,565 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-12 10:01:41,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 322 transitions, 687 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2022-07-12 10:01:41,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:41,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-12 10:01:41,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:43,443 INFO L129 PetriNetUnfolder]: 1847/9295 cut-off events. [2022-07-12 10:01:43,444 INFO L130 PetriNetUnfolder]: For 764/764 co-relation queries the response was YES. [2022-07-12 10:01:43,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 9295 events. 1847/9295 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 98815 event pairs, 755 based on Foata normal form. 0/8015 useless extension candidates. Maximal degree in co-relation 11977. Up to 1044 conditions per place. [2022-07-12 10:01:43,714 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 32 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-12 10:01:43,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 334 transitions, 796 flow [2022-07-12 10:01:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 945 transitions. [2022-07-12 10:01:43,717 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798882681564246 [2022-07-12 10:01:43,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 945 transitions. [2022-07-12 10:01:43,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 945 transitions. [2022-07-12 10:01:43,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:43,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 945 transitions. [2022-07-12 10:01:43,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 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) [2022-07-12 10:01:43,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:43,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 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) [2022-07-12 10:01:43,723 INFO L186 Difference]: Start difference. First operand has 313 places, 322 transitions, 687 flow. Second operand 3 states and 945 transitions. [2022-07-12 10:01:43,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 334 transitions, 796 flow [2022-07-12 10:01:43,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 334 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:01:43,731 INFO L242 Difference]: Finished difference. Result has 315 places, 322 transitions, 696 flow [2022-07-12 10:01:43,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=696, PETRI_PLACES=315, PETRI_TRANSITIONS=322} [2022-07-12 10:01:43,735 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -3 predicate places. [2022-07-12 10:01:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 322 transitions, 696 flow [2022-07-12 10:01:43,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2022-07-12 10:01:43,736 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:43,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:43,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:01:43,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:01:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2049506815, now seen corresponding path program 1 times [2022-07-12 10:01:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286568172] [2022-07-12 10:01:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:43,762 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:01:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:01:43,800 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:01:43,800 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:01:43,800 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-12 10:01:43,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:01:43,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:01:43,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-12 10:01:43,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-12 10:01:43,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:01:43,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:01:43,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:01:43,802 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:01:43,804 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:01:43,804 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:01:43,872 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:01:43,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 374 places, 422 transitions, 904 flow [2022-07-12 10:01:43,974 INFO L129 PetriNetUnfolder]: 67/498 cut-off events. [2022-07-12 10:01:43,974 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:01:43,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 67/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1888 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 440. Up to 14 conditions per place. [2022-07-12 10:01:43,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 422 transitions, 904 flow [2022-07-12 10:01:43,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 422 transitions, 904 flow [2022-07-12 10:01:44,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:01:44,005 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:01:44,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-12 10:01:44,019 INFO L129 PetriNetUnfolder]: 13/168 cut-off events. [2022-07-12 10:01:44,019 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:01:44,020 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:44,020 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:44,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:01:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 503615203, now seen corresponding path program 1 times [2022-07-12 10:01:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139182871] [2022-07-12 10:01:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:44,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139182871] [2022-07-12 10:01:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139182871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:44,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:44,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:01:44,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394676818] [2022-07-12 10:01:44,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:44,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:01:44,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:01:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:01:44,065 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 422 [2022-07-12 10:01:44,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 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) [2022-07-12 10:01:44,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:44,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 422 [2022-07-12 10:01:44,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:45,098 INFO L129 PetriNetUnfolder]: 573/4350 cut-off events. [2022-07-12 10:01:45,098 INFO L130 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-07-12 10:01:45,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 4350 events. 573/4350 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 38090 event pairs, 258 based on Foata normal form. 1228/5084 useless extension candidates. Maximal degree in co-relation 2551. Up to 385 conditions per place. [2022-07-12 10:01:45,239 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 12 selfloop transitions, 0 changer transitions 0/379 dead transitions. [2022-07-12 10:01:45,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 379 transitions, 842 flow [2022-07-12 10:01:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:01:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:01:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 788 transitions. [2022-07-12 10:01:45,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.933649289099526 [2022-07-12 10:01:45,242 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 788 transitions. [2022-07-12 10:01:45,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 788 transitions. [2022-07-12 10:01:45,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:45,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 788 transitions. [2022-07-12 10:01:45,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.0) internal successors, (788), 2 states have internal predecessors, (788), 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) [2022-07-12 10:01:45,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 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) [2022-07-12 10:01:45,248 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 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) [2022-07-12 10:01:45,248 INFO L186 Difference]: Start difference. First operand has 374 places, 422 transitions, 904 flow. Second operand 2 states and 788 transitions. [2022-07-12 10:01:45,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 379 transitions, 842 flow [2022-07-12 10:01:45,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 379 transitions, 812 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:45,256 INFO L242 Difference]: Finished difference. Result has 363 places, 379 transitions, 788 flow [2022-07-12 10:01:45,257 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=788, PETRI_PLACES=363, PETRI_TRANSITIONS=379} [2022-07-12 10:01:45,258 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -11 predicate places. [2022-07-12 10:01:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 379 transitions, 788 flow [2022-07-12 10:01:45,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 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) [2022-07-12 10:01:45,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:45,259 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:45,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:01:45,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:01:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 266410080, now seen corresponding path program 1 times [2022-07-12 10:01:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731970183] [2022-07-12 10:01:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731970183] [2022-07-12 10:01:45,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731970183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:45,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:45,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088333728] [2022-07-12 10:01:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:45,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-12 10:01:45,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 379 transitions, 788 flow. Second operand has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 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) [2022-07-12 10:01:45,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:45,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-12 10:01:45,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:50,620 INFO L129 PetriNetUnfolder]: 4491/22742 cut-off events. [2022-07-12 10:01:50,620 INFO L130 PetriNetUnfolder]: For 1675/1675 co-relation queries the response was YES. [2022-07-12 10:01:51,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 22742 events. 4491/22742 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 287776 event pairs, 1698 based on Foata normal form. 0/19731 useless extension candidates. Maximal degree in co-relation 28710. Up to 2511 conditions per place. [2022-07-12 10:01:51,275 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 37 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-12 10:01:51,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 394 transitions, 923 flow [2022-07-12 10:01:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1118 transitions. [2022-07-12 10:01:51,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8830963665086888 [2022-07-12 10:01:51,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1118 transitions. [2022-07-12 10:01:51,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1118 transitions. [2022-07-12 10:01:51,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:51,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1118 transitions. [2022-07-12 10:01:51,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.6666666666667) internal successors, (1118), 3 states have internal predecessors, (1118), 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) [2022-07-12 10:01:51,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:01:51,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:01:51,284 INFO L186 Difference]: Start difference. First operand has 363 places, 379 transitions, 788 flow. Second operand 3 states and 1118 transitions. [2022-07-12 10:01:51,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 394 transitions, 923 flow [2022-07-12 10:01:51,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 923 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:01:51,290 INFO L242 Difference]: Finished difference. Result has 366 places, 379 transitions, 799 flow [2022-07-12 10:01:51,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=799, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2022-07-12 10:01:51,292 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -8 predicate places. [2022-07-12 10:01:51,292 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 799 flow [2022-07-12 10:01:51,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 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) [2022-07-12 10:01:51,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:51,293 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:51,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:01:51,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:01:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1160838450, now seen corresponding path program 1 times [2022-07-12 10:01:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224165774] [2022-07-12 10:01:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:51,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:01:51,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:51,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224165774] [2022-07-12 10:01:51,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224165774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:51,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:51,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833903237] [2022-07-12 10:01:51,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:51,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-12 10:01:51,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 799 flow. Second operand has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 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) [2022-07-12 10:01:51,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:51,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-12 10:01:51,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:01:55,276 INFO L129 PetriNetUnfolder]: 3439/17495 cut-off events. [2022-07-12 10:01:55,276 INFO L130 PetriNetUnfolder]: For 1523/1523 co-relation queries the response was YES. [2022-07-12 10:01:55,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22442 conditions, 17495 events. 3439/17495 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 210472 event pairs, 1538 based on Foata normal form. 0/15417 useless extension candidates. Maximal degree in co-relation 22431. Up to 2232 conditions per place. [2022-07-12 10:01:55,855 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 33 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-12 10:01:55,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 393 transitions, 922 flow [2022-07-12 10:01:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:01:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:01:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1125 transitions. [2022-07-12 10:01:55,859 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8886255924170616 [2022-07-12 10:01:55,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1125 transitions. [2022-07-12 10:01:55,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1125 transitions. [2022-07-12 10:01:55,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:01:55,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1125 transitions. [2022-07-12 10:01:55,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 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) [2022-07-12 10:01:55,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:01:55,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:01:55,867 INFO L186 Difference]: Start difference. First operand has 366 places, 379 transitions, 799 flow. Second operand 3 states and 1125 transitions. [2022-07-12 10:01:55,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 393 transitions, 922 flow [2022-07-12 10:01:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 393 transitions, 919 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:01:55,881 INFO L242 Difference]: Finished difference. Result has 368 places, 380 transitions, 808 flow [2022-07-12 10:01:55,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=808, PETRI_PLACES=368, PETRI_TRANSITIONS=380} [2022-07-12 10:01:55,883 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -6 predicate places. [2022-07-12 10:01:55,883 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 380 transitions, 808 flow [2022-07-12 10:01:55,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 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) [2022-07-12 10:01:55,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:01:55,883 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:01:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:01:55,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:01:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:01:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1848432253, now seen corresponding path program 1 times [2022-07-12 10:01:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:01:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734518912] [2022-07-12 10:01:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:01:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:01:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:01:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:01:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:01:55,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734518912] [2022-07-12 10:01:55,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734518912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:01:55,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:01:55,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:01:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798707013] [2022-07-12 10:01:55,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:01:55,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:01:55,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:01:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:01:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:01:55,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-12 10:01:55,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 380 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 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) [2022-07-12 10:01:55,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:01:55,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-12 10:01:55,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:00,487 INFO L129 PetriNetUnfolder]: 4229/19775 cut-off events. [2022-07-12 10:02:00,487 INFO L130 PetriNetUnfolder]: For 1628/1628 co-relation queries the response was YES. [2022-07-12 10:02:00,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25658 conditions, 19775 events. 4229/19775 cut-off events. For 1628/1628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 242336 event pairs, 1689 based on Foata normal form. 0/17105 useless extension candidates. Maximal degree in co-relation 25646. Up to 2484 conditions per place. [2022-07-12 10:02:01,199 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 36 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-12 10:02:01,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 394 transitions, 934 flow [2022-07-12 10:02:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:02:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:02:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1117 transitions. [2022-07-12 10:02:01,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882306477093207 [2022-07-12 10:02:01,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1117 transitions. [2022-07-12 10:02:01,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1117 transitions. [2022-07-12 10:02:01,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:02:01,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1117 transitions. [2022-07-12 10:02:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 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) [2022-07-12 10:02:01,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:01,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:01,209 INFO L186 Difference]: Start difference. First operand has 368 places, 380 transitions, 808 flow. Second operand 3 states and 1117 transitions. [2022-07-12 10:02:01,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 394 transitions, 934 flow [2022-07-12 10:02:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 394 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:02:01,217 INFO L242 Difference]: Finished difference. Result has 370 places, 380 transitions, 817 flow [2022-07-12 10:02:01,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=817, PETRI_PLACES=370, PETRI_TRANSITIONS=380} [2022-07-12 10:02:01,219 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -4 predicate places. [2022-07-12 10:02:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 380 transitions, 817 flow [2022-07-12 10:02:01,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 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) [2022-07-12 10:02:01,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:01,220 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:01,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:02:01,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:02:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1553265593, now seen corresponding path program 1 times [2022-07-12 10:02:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:01,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186784043] [2022-07-12 10:02:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:02:01,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:01,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186784043] [2022-07-12 10:02:01,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186784043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:02:01,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:02:01,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:02:01,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346210580] [2022-07-12 10:02:01,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:02:01,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:02:01,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:02:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:02:01,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-12 10:02:01,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 380 transitions, 817 flow. Second operand has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:02:01,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:01,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-12 10:02:01,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:04,600 INFO L129 PetriNetUnfolder]: 3197/14565 cut-off events. [2022-07-12 10:02:04,600 INFO L130 PetriNetUnfolder]: For 1515/1515 co-relation queries the response was YES. [2022-07-12 10:02:04,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 14565 events. 3197/14565 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 169203 event pairs, 1530 based on Foata normal form. 0/12810 useless extension candidates. Maximal degree in co-relation 19479. Up to 2215 conditions per place. [2022-07-12 10:02:05,020 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 32 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-12 10:02:05,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 393 transitions, 931 flow [2022-07-12 10:02:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:02:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:02:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-07-12 10:02:05,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8878357030015798 [2022-07-12 10:02:05,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-07-12 10:02:05,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-07-12 10:02:05,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:02:05,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-07-12 10:02:05,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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) [2022-07-12 10:02:05,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:05,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:05,030 INFO L186 Difference]: Start difference. First operand has 370 places, 380 transitions, 817 flow. Second operand 3 states and 1124 transitions. [2022-07-12 10:02:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 393 transitions, 931 flow [2022-07-12 10:02:05,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 393 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:02:05,040 INFO L242 Difference]: Finished difference. Result has 372 places, 381 transitions, 826 flow [2022-07-12 10:02:05,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=826, PETRI_PLACES=372, PETRI_TRANSITIONS=381} [2022-07-12 10:02:05,041 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -2 predicate places. [2022-07-12 10:02:05,042 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 381 transitions, 826 flow [2022-07-12 10:02:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:02:05,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:05,042 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:02:05,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:02:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash 431457669, now seen corresponding path program 1 times [2022-07-12 10:02:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:05,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528994412] [2022-07-12 10:02:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:05,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:05,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528994412] [2022-07-12 10:02:05,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528994412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:02:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561920751] [2022-07-12 10:02:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:05,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:02:05,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:02:05,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:02:05,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:02:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:05,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:02:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:02:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:05,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:02:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:05,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561920751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:02:05,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:02:05,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-12 10:02:05,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699661703] [2022-07-12 10:02:05,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:02:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:02:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:02:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:02:05,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 422 [2022-07-12 10:02:05,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 381 transitions, 826 flow. Second operand has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 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) [2022-07-12 10:02:05,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:05,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 422 [2022-07-12 10:02:05,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:09,073 INFO L129 PetriNetUnfolder]: 3613/14085 cut-off events. [2022-07-12 10:02:09,073 INFO L130 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-07-12 10:02:09,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20200 conditions, 14085 events. 3613/14085 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 158563 event pairs, 1218 based on Foata normal form. 63/12466 useless extension candidates. Maximal degree in co-relation 20186. Up to 1723 conditions per place. [2022-07-12 10:02:09,458 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 62 selfloop transitions, 6 changer transitions 0/426 dead transitions. [2022-07-12 10:02:09,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 426 transitions, 1152 flow [2022-07-12 10:02:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:02:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:02:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2241 transitions. [2022-07-12 10:02:09,464 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8850710900473934 [2022-07-12 10:02:09,464 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2241 transitions. [2022-07-12 10:02:09,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2241 transitions. [2022-07-12 10:02:09,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:02:09,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2241 transitions. [2022-07-12 10:02:09,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 373.5) internal successors, (2241), 6 states have internal predecessors, (2241), 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) [2022-07-12 10:02:09,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2022-07-12 10:02:09,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 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) [2022-07-12 10:02:09,482 INFO L186 Difference]: Start difference. First operand has 372 places, 381 transitions, 826 flow. Second operand 6 states and 2241 transitions. [2022-07-12 10:02:09,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 426 transitions, 1152 flow [2022-07-12 10:02:09,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 426 transitions, 1150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:02:09,491 INFO L242 Difference]: Finished difference. Result has 380 places, 384 transitions, 860 flow [2022-07-12 10:02:09,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=380, PETRI_TRANSITIONS=384} [2022-07-12 10:02:09,492 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 6 predicate places. [2022-07-12 10:02:09,493 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 384 transitions, 860 flow [2022-07-12 10:02:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 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) [2022-07-12 10:02:09,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:09,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:09,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:02:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:02:09,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:02:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -805755012, now seen corresponding path program 1 times [2022-07-12 10:02:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020170069] [2022-07-12 10:02:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 10:02:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020170069] [2022-07-12 10:02:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020170069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:02:09,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:02:09,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:02:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069369613] [2022-07-12 10:02:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:02:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:02:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:02:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:02:09,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-12 10:02:09,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 384 transitions, 860 flow. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 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) [2022-07-12 10:02:09,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:09,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-12 10:02:09,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:15,284 INFO L129 PetriNetUnfolder]: 4556/21174 cut-off events. [2022-07-12 10:02:15,285 INFO L130 PetriNetUnfolder]: For 1540/1540 co-relation queries the response was YES. [2022-07-12 10:02:15,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 21174 events. 4556/21174 cut-off events. For 1540/1540 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 256339 event pairs, 2037 based on Foata normal form. 0/18359 useless extension candidates. Maximal degree in co-relation 27350. Up to 2421 conditions per place. [2022-07-12 10:02:16,072 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 35 selfloop transitions, 3 changer transitions 0/397 dead transitions. [2022-07-12 10:02:16,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 397 transitions, 977 flow [2022-07-12 10:02:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:02:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:02:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2022-07-12 10:02:16,075 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8815165876777251 [2022-07-12 10:02:16,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2022-07-12 10:02:16,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2022-07-12 10:02:16,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:02:16,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2022-07-12 10:02:16,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 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) [2022-07-12 10:02:16,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:16,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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) [2022-07-12 10:02:16,081 INFO L186 Difference]: Start difference. First operand has 380 places, 384 transitions, 860 flow. Second operand 3 states and 1116 transitions. [2022-07-12 10:02:16,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 397 transitions, 977 flow [2022-07-12 10:02:16,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 397 transitions, 973 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-12 10:02:16,090 INFO L242 Difference]: Finished difference. Result has 382 places, 384 transitions, 867 flow [2022-07-12 10:02:16,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=867, PETRI_PLACES=382, PETRI_TRANSITIONS=384} [2022-07-12 10:02:16,091 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 8 predicate places. [2022-07-12 10:02:16,091 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 384 transitions, 867 flow [2022-07-12 10:02:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 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) [2022-07-12 10:02:16,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:16,092 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:02:16,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-12 10:02:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash 137276488, now seen corresponding path program 1 times [2022-07-12 10:02:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:16,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200990181] [2022-07-12 10:02:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:16,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:16,111 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:02:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:02:16,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:02:16,128 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:02:16,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-12 10:02:16,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-12 10:02:16,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-12 10:02:16,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-12 10:02:16,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-12 10:02:16,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-12 10:02:16,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-12 10:02:16,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-12 10:02:16,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:02:16,129 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:16,130 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:02:16,130 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:02:16,195 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:02:16,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 430 places, 486 transitions, 1049 flow [2022-07-12 10:02:16,541 INFO L129 PetriNetUnfolder]: 78/575 cut-off events. [2022-07-12 10:02:16,542 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:02:16,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 575 events. 78/575 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2259 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2022-07-12 10:02:16,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 430 places, 486 transitions, 1049 flow [2022-07-12 10:02:16,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 430 places, 486 transitions, 1049 flow [2022-07-12 10:02:16,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:02:16,566 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@5b5ba324, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69dd1b3e [2022-07-12 10:02:16,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-12 10:02:16,579 INFO L129 PetriNetUnfolder]: 13/172 cut-off events. [2022-07-12 10:02:16,579 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:02:16,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:16,579 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:16,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-12 10:02:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1647412281, now seen corresponding path program 1 times [2022-07-12 10:02:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910964997] [2022-07-12 10:02:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:16,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:16,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910964997] [2022-07-12 10:02:16,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910964997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:02:16,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:02:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:02:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898149431] [2022-07-12 10:02:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:02:16,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:02:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:02:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:02:16,603 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 486 [2022-07-12 10:02:16,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 486 transitions, 1049 flow. Second operand has 2 states, 2 states have (on average 429.0) internal successors, (858), 2 states have internal predecessors, (858), 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) [2022-07-12 10:02:16,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:16,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 486 [2022-07-12 10:02:16,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:02:19,117 INFO L129 PetriNetUnfolder]: 1277/8862 cut-off events. [2022-07-12 10:02:19,117 INFO L130 PetriNetUnfolder]: For 4159/4159 co-relation queries the response was YES. [2022-07-12 10:02:19,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 8862 events. 1277/8862 cut-off events. For 4159/4159 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 91187 event pairs, 642 based on Foata normal form. 2956/10820 useless extension candidates. Maximal degree in co-relation 5383. Up to 897 conditions per place. [2022-07-12 10:02:19,349 INFO L132 encePairwiseOnDemand]: 449/486 looper letters, 14 selfloop transitions, 0 changer transitions 0/437 dead transitions. [2022-07-12 10:02:19,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 437 transitions, 979 flow [2022-07-12 10:02:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:02:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:02:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 907 transitions. [2022-07-12 10:02:19,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9331275720164609 [2022-07-12 10:02:19,352 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 907 transitions. [2022-07-12 10:02:19,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 907 transitions. [2022-07-12 10:02:19,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:02:19,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 907 transitions. [2022-07-12 10:02:19,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 453.5) internal successors, (907), 2 states have internal predecessors, (907), 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) [2022-07-12 10:02:19,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 486.0) internal successors, (1458), 3 states have internal predecessors, (1458), 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) [2022-07-12 10:02:19,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 486.0) internal successors, (1458), 3 states have internal predecessors, (1458), 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) [2022-07-12 10:02:19,356 INFO L186 Difference]: Start difference. First operand has 430 places, 486 transitions, 1049 flow. Second operand 2 states and 907 transitions. [2022-07-12 10:02:19,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 437 transitions, 979 flow [2022-07-12 10:02:19,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 437 transitions, 937 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-12 10:02:19,366 INFO L242 Difference]: Finished difference. Result has 418 places, 437 transitions, 909 flow [2022-07-12 10:02:19,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=486, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=909, PETRI_PLACES=418, PETRI_TRANSITIONS=437} [2022-07-12 10:02:19,367 INFO L279 CegarLoopForPetriNet]: 430 programPoint places, -12 predicate places. [2022-07-12 10:02:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 437 transitions, 909 flow [2022-07-12 10:02:19,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 429.0) internal successors, (858), 2 states have internal predecessors, (858), 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) [2022-07-12 10:02:19,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:02:19,368 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:02:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:02:19,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-12 10:02:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:02:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1416531806, now seen corresponding path program 1 times [2022-07-12 10:02:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:02:19,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384518518] [2022-07-12 10:02:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:02:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:02:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:02:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:02:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:02:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384518518] [2022-07-12 10:02:19,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384518518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:02:19,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:02:19,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:02:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430974937] [2022-07-12 10:02:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:02:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:02:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:02:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:02:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:02:19,395 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 415 out of 486 [2022-07-12 10:02:19,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 437 transitions, 909 flow. Second operand has 3 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 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) [2022-07-12 10:02:19,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:02:19,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 415 of 486 [2022-07-12 10:02:19,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand