./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/32_pthread5_vs.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/32_pthread5_vs.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 a1dca423de1ee0965d72c4be0ada5e821e4dbfc023ab1c498b90df0e18b4c1f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:02:59,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:02:59,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:02:59,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:02:59,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:02:59,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:02:59,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:02:59,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:02:59,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:02:59,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:02:59,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:02:59,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:02:59,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:02:59,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:02:59,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:02:59,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:02:59,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:02:59,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:02:59,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:02:59,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:02:59,176 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:02:59,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:02:59,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:02:59,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:02:59,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:02:59,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:02:59,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:02:59,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:02:59,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:02:59,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:02:59,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:02:59,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:02:59,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:02:59,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:02:59,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:02:59,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:02:59,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:02:59,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:02:59,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:02:59,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:02:59,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:02:59,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:02:59,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:02:59,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:02:59,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:02:59,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:02:59,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:02:59,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:02:59,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:02:59,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:02:59,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:02:59,235 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:02:59,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:02:59,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:02:59,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:02:59,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:02:59,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:02:59,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:02:59,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:02:59,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:02:59,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:02:59,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:02:59,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:02:59,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:02:59,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:02:59,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:02:59,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:02:59,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:02:59,241 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:02:59,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:02:59,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:02:59,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1dca423de1ee0965d72c4be0ada5e821e4dbfc023ab1c498b90df0e18b4c1f3 [2022-07-12 10:02:59,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:02:59,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:02:59,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:02:59,519 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:02:59,520 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:02:59,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/32_pthread5_vs.i [2022-07-12 10:02:59,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7436fb00e/2a2d6015dadd43bd96fd309908ea4495/FLAG320a71cf2 [2022-07-12 10:03:00,034 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:03:00,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/32_pthread5_vs.i [2022-07-12 10:03:00,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7436fb00e/2a2d6015dadd43bd96fd309908ea4495/FLAG320a71cf2 [2022-07-12 10:03:00,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7436fb00e/2a2d6015dadd43bd96fd309908ea4495 [2022-07-12 10:03:00,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:03:00,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:03:00,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:00,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:03:00,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:03:00,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ac340e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00, skipping insertion in model container [2022-07-12 10:03:00,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:03:00,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:03:00,523 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/32_pthread5_vs.i[30454,30467] [2022-07-12 10:03:00,529 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/32_pthread5_vs.i[30634,30647] [2022-07-12 10:03:00,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:00,548 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:03:00,583 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/32_pthread5_vs.i[30454,30467] [2022-07-12 10:03:00,585 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/32_pthread5_vs.i[30634,30647] [2022-07-12 10:03:00,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:03:00,619 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:03:00,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00 WrapperNode [2022-07-12 10:03:00,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:03:00,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:00,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:03:00,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:03:00,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,672 INFO L137 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 128 [2022-07-12 10:03:00,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:03:00,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:03:00,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:03:00,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:03:00,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:03:00,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:03:00,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:03:00,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:03:00,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (1/1) ... [2022-07-12 10:03:00,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:03:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:03:00,751 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 10:03:00,758 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 10:03:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-12 10:03:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure thr3 [2022-07-12 10:03:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thr3 [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-12 10:03:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:03:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:03:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:03:00,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:03:00,784 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 10:03:00,869 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:03:00,870 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:03:01,062 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:03:01,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:03:01,148 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:03:01,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:01 BoogieIcfgContainer [2022-07-12 10:03:01,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:03:01,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:03:01,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:03:01,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:03:01,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:03:00" (1/3) ... [2022-07-12 10:03:01,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a869a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:01, skipping insertion in model container [2022-07-12 10:03:01,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:03:00" (2/3) ... [2022-07-12 10:03:01,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a869a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:03:01, skipping insertion in model container [2022-07-12 10:03:01,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:01" (3/3) ... [2022-07-12 10:03:01,158 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_pthread5_vs.i [2022-07-12 10:03:01,163 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:03:01,172 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:03:01,172 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 10:03:01,172 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:03:01,249 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:01,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 197 flow [2022-07-12 10:03:01,359 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2022-07-12 10:03:01,359 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:01,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 100 events. 8/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-07-12 10:03:01,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 197 flow [2022-07-12 10:03:01,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 89 transitions, 189 flow [2022-07-12 10:03:01,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:01,385 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@1fc019a4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72002341 [2022-07-12 10:03:01,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:03:01,402 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-12 10:03:01,406 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:01,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:01,407 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] [2022-07-12 10:03:01,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:03:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash 542323430, now seen corresponding path program 1 times [2022-07-12 10:03:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:01,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320547690] [2022-07-12 10:03:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:01,727 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 10:03:01,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:01,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320547690] [2022-07-12 10:03:01,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320547690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:01,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:01,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768255814] [2022-07-12 10:03:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:01,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:01,764 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 91 [2022-07-12 10:03:01,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 10:03:01,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:01,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 91 [2022-07-12 10:03:01,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:02,188 INFO L129 PetriNetUnfolder]: 769/1730 cut-off events. [2022-07-12 10:03:02,189 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-12 10:03:02,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1730 events. 769/1730 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12215 event pairs, 147 based on Foata normal form. 773/2393 useless extension candidates. Maximal degree in co-relation 3020. Up to 427 conditions per place. [2022-07-12 10:03:02,216 INFO L132 encePairwiseOnDemand]: 76/91 looper letters, 48 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2022-07-12 10:03:02,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 366 flow [2022-07-12 10:03:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2022-07-12 10:03:02,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8747252747252747 [2022-07-12 10:03:02,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2022-07-12 10:03:02,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2022-07-12 10:03:02,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:02,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2022-07-12 10:03:02,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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 10:03:02,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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 10:03:02,258 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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 10:03:02,260 INFO L186 Difference]: Start difference. First operand has 91 places, 89 transitions, 189 flow. Second operand 5 states and 398 transitions. [2022-07-12 10:03:02,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 366 flow [2022-07-12 10:03:02,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:03:02,270 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 247 flow [2022-07-12 10:03:02,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2022-07-12 10:03:02,278 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, -5 predicate places. [2022-07-12 10:03:02,278 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 247 flow [2022-07-12 10:03:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 10:03:02,279 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:02,279 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] [2022-07-12 10:03:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:03:02,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:03:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 53511059, now seen corresponding path program 1 times [2022-07-12 10:03:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32138337] [2022-07-12 10:03:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:02,413 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 10:03:02,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32138337] [2022-07-12 10:03:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32138337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:02,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:02,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:03:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622130043] [2022-07-12 10:03:02,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:03:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:03:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:03:02,423 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 91 [2022-07-12 10:03:02,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 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 10:03:02,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:02,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 91 [2022-07-12 10:03:02,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:02,719 INFO L129 PetriNetUnfolder]: 337/1034 cut-off events. [2022-07-12 10:03:02,719 INFO L130 PetriNetUnfolder]: For 329/335 co-relation queries the response was YES. [2022-07-12 10:03:02,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1034 events. 337/1034 cut-off events. For 329/335 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6822 event pairs, 63 based on Foata normal form. 93/1079 useless extension candidates. Maximal degree in co-relation 2031. Up to 159 conditions per place. [2022-07-12 10:03:02,735 INFO L132 encePairwiseOnDemand]: 75/91 looper letters, 48 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2022-07-12 10:03:02,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 522 flow [2022-07-12 10:03:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:03:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:03:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 572 transitions. [2022-07-12 10:03:02,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-07-12 10:03:02,739 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 572 transitions. [2022-07-12 10:03:02,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 572 transitions. [2022-07-12 10:03:02,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:02,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 572 transitions. [2022-07-12 10:03:02,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.5) internal successors, (572), 8 states have internal predecessors, (572), 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 10:03:02,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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 10:03:02,744 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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 10:03:02,744 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 247 flow. Second operand 8 states and 572 transitions. [2022-07-12 10:03:02,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 522 flow [2022-07-12 10:03:02,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 518 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-07-12 10:03:02,751 INFO L242 Difference]: Finished difference. Result has 98 places, 100 transitions, 440 flow [2022-07-12 10:03:02,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2022-07-12 10:03:02,752 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-07-12 10:03:02,752 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 440 flow [2022-07-12 10:03:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.5) internal successors, (375), 6 states have internal predecessors, (375), 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 10:03:02,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:02,753 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] [2022-07-12 10:03:02,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:03:02,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:03:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1259715748, now seen corresponding path program 1 times [2022-07-12 10:03:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219488000] [2022-07-12 10:03:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:02,799 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 10:03:02,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:02,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219488000] [2022-07-12 10:03:02,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219488000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:02,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:02,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:02,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387418253] [2022-07-12 10:03:02,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:02,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:02,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 91 [2022-07-12 10:03:02,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 10:03:02,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:02,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 91 [2022-07-12 10:03:02,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:02,986 INFO L129 PetriNetUnfolder]: 298/943 cut-off events. [2022-07-12 10:03:02,987 INFO L130 PetriNetUnfolder]: For 1495/1529 co-relation queries the response was YES. [2022-07-12 10:03:02,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 943 events. 298/943 cut-off events. For 1495/1529 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6091 event pairs, 91 based on Foata normal form. 28/912 useless extension candidates. Maximal degree in co-relation 2941. Up to 320 conditions per place. [2022-07-12 10:03:03,000 INFO L132 encePairwiseOnDemand]: 84/91 looper letters, 59 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2022-07-12 10:03:03,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 124 transitions, 737 flow [2022-07-12 10:03:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 360 transitions. [2022-07-12 10:03:03,002 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912087912087912 [2022-07-12 10:03:03,003 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 360 transitions. [2022-07-12 10:03:03,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 360 transitions. [2022-07-12 10:03:03,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:03,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 360 transitions. [2022-07-12 10:03:03,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 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 10:03:03,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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 10:03:03,006 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 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 10:03:03,006 INFO L186 Difference]: Start difference. First operand has 98 places, 100 transitions, 440 flow. Second operand 5 states and 360 transitions. [2022-07-12 10:03:03,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 124 transitions, 737 flow [2022-07-12 10:03:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 124 transitions, 730 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:03,016 INFO L242 Difference]: Finished difference. Result has 103 places, 102 transitions, 496 flow [2022-07-12 10:03:03,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2022-07-12 10:03:03,017 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 12 predicate places. [2022-07-12 10:03:03,017 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 496 flow [2022-07-12 10:03:03,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 10:03:03,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:03,018 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] [2022-07-12 10:03:03,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:03:03,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:03:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:03,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1826699581, now seen corresponding path program 1 times [2022-07-12 10:03:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:03,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503837711] [2022-07-12 10:03:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:03,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:03,037 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:03,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:03,068 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:03,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-12 10:03:03,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:03:03,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:03:03,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-07-12 10:03:03,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-12 10:03:03,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:03:03,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:03:03,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:03:03,073 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:03:03,075 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:03,076 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:03:03,105 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:03,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 138 transitions, 312 flow [2022-07-12 10:03:03,133 INFO L129 PetriNetUnfolder]: 12/137 cut-off events. [2022-07-12 10:03:03,134 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:03:03,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 284 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 148. Up to 6 conditions per place. [2022-07-12 10:03:03,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 138 transitions, 312 flow [2022-07-12 10:03:03,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 113 transitions, 244 flow [2022-07-12 10:03:03,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:03,141 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@1fc019a4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72002341 [2022-07-12 10:03:03,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-12 10:03:03,146 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2022-07-12 10:03:03,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:03,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:03,148 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] [2022-07-12 10:03:03,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:03:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 242664739, now seen corresponding path program 1 times [2022-07-12 10:03:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:03,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984414775] [2022-07-12 10:03:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:03,234 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 10:03:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984414775] [2022-07-12 10:03:03,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984414775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:03,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:03,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:03,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575749328] [2022-07-12 10:03:03,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:03,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 138 [2022-07-12 10:03:03,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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 10:03:03,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:03,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 138 [2022-07-12 10:03:03,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:05,818 INFO L129 PetriNetUnfolder]: 11938/22343 cut-off events. [2022-07-12 10:03:05,819 INFO L130 PetriNetUnfolder]: For 1367/1367 co-relation queries the response was YES. [2022-07-12 10:03:05,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40255 conditions, 22343 events. 11938/22343 cut-off events. For 1367/1367 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 212384 event pairs, 3227 based on Foata normal form. 8105/28466 useless extension candidates. Maximal degree in co-relation 40222. Up to 5309 conditions per place. [2022-07-12 10:03:06,239 INFO L132 encePairwiseOnDemand]: 119/138 looper letters, 79 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2022-07-12 10:03:06,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 558 flow [2022-07-12 10:03:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 550 transitions. [2022-07-12 10:03:06,241 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971014492753623 [2022-07-12 10:03:06,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 550 transitions. [2022-07-12 10:03:06,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 550 transitions. [2022-07-12 10:03:06,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:06,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 550 transitions. [2022-07-12 10:03:06,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.0) internal successors, (550), 5 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 10:03:06,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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 10:03:06,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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 10:03:06,247 INFO L186 Difference]: Start difference. First operand has 114 places, 113 transitions, 244 flow. Second operand 5 states and 550 transitions. [2022-07-12 10:03:06,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 558 flow [2022-07-12 10:03:06,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-12 10:03:06,252 INFO L242 Difference]: Finished difference. Result has 108 places, 110 transitions, 342 flow [2022-07-12 10:03:06,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=342, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2022-07-12 10:03:06,254 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, -6 predicate places. [2022-07-12 10:03:06,254 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 342 flow [2022-07-12 10:03:06,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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 10:03:06,255 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:06,255 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] [2022-07-12 10:03:06,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:03:06,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:03:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 39245840, now seen corresponding path program 1 times [2022-07-12 10:03:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:06,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747996350] [2022-07-12 10:03:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:06,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:06,373 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 10:03:06,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:06,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747996350] [2022-07-12 10:03:06,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747996350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:06,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:06,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:03:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853101858] [2022-07-12 10:03:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:06,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:03:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:03:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:03:06,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 138 [2022-07-12 10:03:06,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 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 10:03:06,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:06,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 138 [2022-07-12 10:03:06,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:06,704 INFO L129 PetriNetUnfolder]: 360/1752 cut-off events. [2022-07-12 10:03:06,704 INFO L130 PetriNetUnfolder]: For 717/717 co-relation queries the response was YES. [2022-07-12 10:03:06,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1752 events. 360/1752 cut-off events. For 717/717 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 15605 event pairs, 43 based on Foata normal form. 855/2476 useless extension candidates. Maximal degree in co-relation 3553. Up to 252 conditions per place. [2022-07-12 10:03:06,722 INFO L132 encePairwiseOnDemand]: 116/138 looper letters, 43 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2022-07-12 10:03:06,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 162 transitions, 702 flow [2022-07-12 10:03:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:03:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:03:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 866 transitions. [2022-07-12 10:03:06,725 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6972624798711755 [2022-07-12 10:03:06,726 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 866 transitions. [2022-07-12 10:03:06,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 866 transitions. [2022-07-12 10:03:06,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:06,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 866 transitions. [2022-07-12 10:03:06,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 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 10:03:06,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 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 10:03:06,731 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 138.0) internal successors, (1380), 10 states have internal predecessors, (1380), 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 10:03:06,731 INFO L186 Difference]: Start difference. First operand has 108 places, 110 transitions, 342 flow. Second operand 9 states and 866 transitions. [2022-07-12 10:03:06,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 162 transitions, 702 flow [2022-07-12 10:03:06,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 679 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:06,743 INFO L242 Difference]: Finished difference. Result has 117 places, 138 transitions, 521 flow [2022-07-12 10:03:06,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2022-07-12 10:03:06,746 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2022-07-12 10:03:06,746 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 521 flow [2022-07-12 10:03:06,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 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 10:03:06,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:06,747 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] [2022-07-12 10:03:06,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:03:06,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:03:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1938697959, now seen corresponding path program 1 times [2022-07-12 10:03:06,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:06,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292662169] [2022-07-12 10:03:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:06,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:06,792 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 10:03:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292662169] [2022-07-12 10:03:06,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292662169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:06,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:06,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120657128] [2022-07-12 10:03:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:06,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:06,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 138 [2022-07-12 10:03:06,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 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 10:03:06,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:06,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 138 [2022-07-12 10:03:06,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:07,075 INFO L129 PetriNetUnfolder]: 390/1860 cut-off events. [2022-07-12 10:03:07,076 INFO L130 PetriNetUnfolder]: For 1249/1250 co-relation queries the response was YES. [2022-07-12 10:03:07,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4628 conditions, 1860 events. 390/1860 cut-off events. For 1249/1250 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 16809 event pairs, 58 based on Foata normal form. 36/1749 useless extension candidates. Maximal degree in co-relation 4586. Up to 436 conditions per place. [2022-07-12 10:03:07,094 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 84 selfloop transitions, 12 changer transitions 0/161 dead transitions. [2022-07-12 10:03:07,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 840 flow [2022-07-12 10:03:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 489 transitions. [2022-07-12 10:03:07,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7086956521739131 [2022-07-12 10:03:07,097 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 489 transitions. [2022-07-12 10:03:07,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 489 transitions. [2022-07-12 10:03:07,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:07,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 489 transitions. [2022-07-12 10:03:07,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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 10:03:07,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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 10:03:07,102 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 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 10:03:07,102 INFO L186 Difference]: Start difference. First operand has 117 places, 138 transitions, 521 flow. Second operand 5 states and 489 transitions. [2022-07-12 10:03:07,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 840 flow [2022-07-12 10:03:07,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 161 transitions, 831 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:07,112 INFO L242 Difference]: Finished difference. Result has 121 places, 140 transitions, 589 flow [2022-07-12 10:03:07,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=589, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-07-12 10:03:07,115 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2022-07-12 10:03:07,115 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 589 flow [2022-07-12 10:03:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 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 10:03:07,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:07,116 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] [2022-07-12 10:03:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:03:07,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:03:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash 603770055, now seen corresponding path program 1 times [2022-07-12 10:03:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206429359] [2022-07-12 10:03:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:07,159 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 10:03:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206429359] [2022-07-12 10:03:07,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206429359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:07,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:07,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:03:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603174245] [2022-07-12 10:03:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:03:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:03:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:03:07,162 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 138 [2022-07-12 10:03:07,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 10:03:07,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:07,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 138 [2022-07-12 10:03:07,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:07,533 INFO L129 PetriNetUnfolder]: 856/3296 cut-off events. [2022-07-12 10:03:07,534 INFO L130 PetriNetUnfolder]: For 2316/2319 co-relation queries the response was YES. [2022-07-12 10:03:07,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 3296 events. 856/3296 cut-off events. For 2316/2319 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 32028 event pairs, 162 based on Foata normal form. 0/3139 useless extension candidates. Maximal degree in co-relation 8021. Up to 952 conditions per place. [2022-07-12 10:03:07,571 INFO L132 encePairwiseOnDemand]: 132/138 looper letters, 94 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2022-07-12 10:03:07,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 980 flow [2022-07-12 10:03:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:03:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:03:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2022-07-12 10:03:07,574 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-07-12 10:03:07,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2022-07-12 10:03:07,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2022-07-12 10:03:07,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:07,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2022-07-12 10:03:07,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 10:03:07,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 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 10:03:07,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 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 10:03:07,627 INFO L186 Difference]: Start difference. First operand has 121 places, 140 transitions, 589 flow. Second operand 3 states and 322 transitions. [2022-07-12 10:03:07,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 980 flow [2022-07-12 10:03:07,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 185 transitions, 972 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:07,640 INFO L242 Difference]: Finished difference. Result has 124 places, 142 transitions, 609 flow [2022-07-12 10:03:07,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=609, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2022-07-12 10:03:07,641 INFO L279 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2022-07-12 10:03:07,642 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 609 flow [2022-07-12 10:03:07,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 10:03:07,642 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:07,642 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] [2022-07-12 10:03:07,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:03:07,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-12 10:03:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 345022202, now seen corresponding path program 1 times [2022-07-12 10:03:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764803491] [2022-07-12 10:03:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:07,658 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:07,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:07,673 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:07,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-12 10:03:07,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-12 10:03:07,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-12 10:03:07,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 9 remaining) [2022-07-12 10:03:07,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 9 remaining) [2022-07-12 10:03:07,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-12 10:03:07,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-12 10:03:07,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-12 10:03:07,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-12 10:03:07,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:03:07,676 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:03:07,676 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:03:07,677 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:03:07,707 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:03:07,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 187 places, 185 transitions, 433 flow [2022-07-12 10:03:07,729 INFO L129 PetriNetUnfolder]: 16/174 cut-off events. [2022-07-12 10:03:07,730 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:03:07,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 174 events. 16/174 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 404 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-07-12 10:03:07,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 185 transitions, 433 flow [2022-07-12 10:03:07,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 137 transitions, 301 flow [2022-07-12 10:03:07,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:03:07,734 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@1fc019a4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72002341 [2022-07-12 10:03:07,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-12 10:03:07,738 INFO L129 PetriNetUnfolder]: 3/53 cut-off events. [2022-07-12 10:03:07,738 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:03:07,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:07,739 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] [2022-07-12 10:03:07,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-12 10:03:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash 678210754, now seen corresponding path program 1 times [2022-07-12 10:03:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748099375] [2022-07-12 10:03:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:07,773 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 10:03:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748099375] [2022-07-12 10:03:07,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748099375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:07,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:07,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244057094] [2022-07-12 10:03:07,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:07,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:07,777 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 185 [2022-07-12 10:03:07,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 137 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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 10:03:07,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:07,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 185 [2022-07-12 10:03:07,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:28,857 INFO L129 PetriNetUnfolder]: 156504/249408 cut-off events. [2022-07-12 10:03:28,857 INFO L130 PetriNetUnfolder]: For 26446/26446 co-relation queries the response was YES. [2022-07-12 10:03:30,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 467148 conditions, 249408 events. 156504/249408 cut-off events. For 26446/26446 co-relation queries the response was YES. Maximal size of possible extension queue 10207. Compared 2572867 event pairs, 34322 based on Foata normal form. 83736/313878 useless extension candidates. Maximal degree in co-relation 467114. Up to 62510 conditions per place. [2022-07-12 10:03:32,408 INFO L132 encePairwiseOnDemand]: 162/185 looper letters, 108 selfloop transitions, 22 changer transitions 0/209 dead transitions. [2022-07-12 10:03:32,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 209 transitions, 750 flow [2022-07-12 10:03:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2022-07-12 10:03:32,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2022-07-12 10:03:32,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2022-07-12 10:03:32,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2022-07-12 10:03:32,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:32,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2022-07-12 10:03:32,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 10:03:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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 10:03:32,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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 10:03:32,416 INFO L186 Difference]: Start difference. First operand has 137 places, 137 transitions, 301 flow. Second operand 5 states and 700 transitions. [2022-07-12 10:03:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 209 transitions, 750 flow [2022-07-12 10:03:32,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 209 transitions, 735 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-12 10:03:32,430 INFO L242 Difference]: Finished difference. Result has 130 places, 137 transitions, 435 flow [2022-07-12 10:03:32,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=130, PETRI_TRANSITIONS=137} [2022-07-12 10:03:32,432 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, -7 predicate places. [2022-07-12 10:03:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 137 transitions, 435 flow [2022-07-12 10:03:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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 10:03:32,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:32,433 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] [2022-07-12 10:03:32,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:03:32,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-12 10:03:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1142746072, now seen corresponding path program 1 times [2022-07-12 10:03:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:32,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753208925] [2022-07-12 10:03:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:32,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:32,487 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 10:03:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753208925] [2022-07-12 10:03:32,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753208925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:32,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:32,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:03:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702033202] [2022-07-12 10:03:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:03:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:03:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:03:32,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 185 [2022-07-12 10:03:32,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 137 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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 10:03:32,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:32,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 185 [2022-07-12 10:03:32,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:33,324 INFO L129 PetriNetUnfolder]: 1797/7931 cut-off events. [2022-07-12 10:03:33,324 INFO L130 PetriNetUnfolder]: For 3609/3609 co-relation queries the response was YES. [2022-07-12 10:03:33,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16014 conditions, 7931 events. 1797/7931 cut-off events. For 3609/3609 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 94968 event pairs, 316 based on Foata normal form. 4972/12226 useless extension candidates. Maximal degree in co-relation 15973. Up to 1220 conditions per place. [2022-07-12 10:03:33,396 INFO L132 encePairwiseOnDemand]: 153/185 looper letters, 56 selfloop transitions, 74 changer transitions 0/208 dead transitions. [2022-07-12 10:03:33,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 208 transitions, 934 flow [2022-07-12 10:03:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:03:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:03:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1213 transitions. [2022-07-12 10:03:33,400 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6556756756756756 [2022-07-12 10:03:33,400 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1213 transitions. [2022-07-12 10:03:33,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1213 transitions. [2022-07-12 10:03:33,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:33,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1213 transitions. [2022-07-12 10:03:33,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.3) internal successors, (1213), 10 states have internal predecessors, (1213), 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 10:03:33,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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 10:03:33,407 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 185.0) internal successors, (2035), 11 states have internal predecessors, (2035), 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 10:03:33,408 INFO L186 Difference]: Start difference. First operand has 130 places, 137 transitions, 435 flow. Second operand 10 states and 1213 transitions. [2022-07-12 10:03:33,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 208 transitions, 934 flow [2022-07-12 10:03:33,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 208 transitions, 906 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-12 10:03:33,461 INFO L242 Difference]: Finished difference. Result has 141 places, 177 transitions, 713 flow [2022-07-12 10:03:33,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=713, PETRI_PLACES=141, PETRI_TRANSITIONS=177} [2022-07-12 10:03:33,462 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 4 predicate places. [2022-07-12 10:03:33,462 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 177 transitions, 713 flow [2022-07-12 10:03:33,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 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 10:03:33,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:33,463 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] [2022-07-12 10:03:33,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:03:33,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-12 10:03:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1161603247, now seen corresponding path program 1 times [2022-07-12 10:03:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:33,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176631201] [2022-07-12 10:03:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:33,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:33,492 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 10:03:33,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176631201] [2022-07-12 10:03:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176631201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:33,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:33,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:03:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031848159] [2022-07-12 10:03:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:33,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:03:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:03:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:03:33,496 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 185 [2022-07-12 10:03:33,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 177 transitions, 713 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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 10:03:33,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:33,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 185 [2022-07-12 10:03:33,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:34,320 INFO L129 PetriNetUnfolder]: 2005/8924 cut-off events. [2022-07-12 10:03:34,321 INFO L130 PetriNetUnfolder]: For 7235/7241 co-relation queries the response was YES. [2022-07-12 10:03:34,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21980 conditions, 8924 events. 2005/8924 cut-off events. For 7235/7241 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 109022 event pairs, 536 based on Foata normal form. 109/8219 useless extension candidates. Maximal degree in co-relation 21936. Up to 2282 conditions per place. [2022-07-12 10:03:34,399 INFO L132 encePairwiseOnDemand]: 175/185 looper letters, 116 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2022-07-12 10:03:34,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 209 transitions, 1159 flow [2022-07-12 10:03:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:03:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:03:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 623 transitions. [2022-07-12 10:03:34,402 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6735135135135135 [2022-07-12 10:03:34,402 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 623 transitions. [2022-07-12 10:03:34,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 623 transitions. [2022-07-12 10:03:34,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:34,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 623 transitions. [2022-07-12 10:03:34,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 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 10:03:34,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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 10:03:34,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 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 10:03:34,406 INFO L186 Difference]: Start difference. First operand has 141 places, 177 transitions, 713 flow. Second operand 5 states and 623 transitions. [2022-07-12 10:03:34,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 209 transitions, 1159 flow [2022-07-12 10:03:34,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 209 transitions, 1145 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-07-12 10:03:34,478 INFO L242 Difference]: Finished difference. Result has 144 places, 180 transitions, 800 flow [2022-07-12 10:03:34,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=800, PETRI_PLACES=144, PETRI_TRANSITIONS=180} [2022-07-12 10:03:34,479 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 7 predicate places. [2022-07-12 10:03:34,479 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 180 transitions, 800 flow [2022-07-12 10:03:34,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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 10:03:34,480 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:34,480 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] [2022-07-12 10:03:34,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:03:34,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-12 10:03:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1713401640, now seen corresponding path program 1 times [2022-07-12 10:03:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537471229] [2022-07-12 10:03:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:03:34,519 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 10:03:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:03:34,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537471229] [2022-07-12 10:03:34,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537471229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:03:34,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:03:34,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:03:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16176860] [2022-07-12 10:03:34,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:03:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:03:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:03:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:03:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:03:34,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 185 [2022-07-12 10:03:34,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 180 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 10:03:34,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:03:34,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 185 [2022-07-12 10:03:34,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:03:35,828 INFO L129 PetriNetUnfolder]: 4495/15815 cut-off events. [2022-07-12 10:03:35,828 INFO L130 PetriNetUnfolder]: For 11889/11890 co-relation queries the response was YES. [2022-07-12 10:03:35,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38664 conditions, 15815 events. 4495/15815 cut-off events. For 11889/11890 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 201718 event pairs, 805 based on Foata normal form. 0/15063 useless extension candidates. Maximal degree in co-relation 38619. Up to 4656 conditions per place. [2022-07-12 10:03:36,194 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 132 selfloop transitions, 5 changer transitions 0/244 dead transitions. [2022-07-12 10:03:36,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 244 transitions, 1366 flow [2022-07-12 10:03:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:03:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:03:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2022-07-12 10:03:36,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7495495495495496 [2022-07-12 10:03:36,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2022-07-12 10:03:36,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2022-07-12 10:03:36,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:03:36,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2022-07-12 10:03:36,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 10:03:36,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 10:03:36,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 10:03:36,204 INFO L186 Difference]: Start difference. First operand has 144 places, 180 transitions, 800 flow. Second operand 3 states and 416 transitions. [2022-07-12 10:03:36,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 244 transitions, 1366 flow [2022-07-12 10:03:36,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 244 transitions, 1315 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-12 10:03:36,267 INFO L242 Difference]: Finished difference. Result has 146 places, 183 transitions, 801 flow [2022-07-12 10:03:36,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=801, PETRI_PLACES=146, PETRI_TRANSITIONS=183} [2022-07-12 10:03:36,268 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 9 predicate places. [2022-07-12 10:03:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 183 transitions, 801 flow [2022-07-12 10:03:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 10:03:36,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:03:36,269 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 10:03:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:03:36,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-12 10:03:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:03:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1878098968, now seen corresponding path program 1 times [2022-07-12 10:03:36,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:03:36,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497502642] [2022-07-12 10:03:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:03:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:03:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:36,284 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:03:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:03:36,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:03:36,302 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:03:36,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (10 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 11 remaining) [2022-07-12 10:03:36,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2022-07-12 10:03:36,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2022-07-12 10:03:36,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2022-07-12 10:03:36,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2022-07-12 10:03:36,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2022-07-12 10:03:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:03:36,304 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:03:36,309 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2022-07-12 10:03:36,309 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 10:03:36,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 10:03:36 BasicIcfg [2022-07-12 10:03:36,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 10:03:36,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 10:03:36,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 10:03:36,393 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 10:03:36,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:03:01" (3/4) ... [2022-07-12 10:03:36,395 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 10:03:36,478 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 10:03:36,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 10:03:36,479 INFO L158 Benchmark]: Toolchain (without parser) took 36413.59ms. Allocated memory was 90.2MB in the beginning and 13.7GB in the end (delta: 13.6GB). Free memory was 53.9MB in the beginning and 11.6GB in the end (delta: -11.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2022-07-12 10:03:36,479 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:03:36,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 551.82ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 53.7MB in the beginning and 84.3MB in the end (delta: -30.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 10:03:36,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.68ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 82.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:03:36,480 INFO L158 Benchmark]: Boogie Preprocessor took 38.82ms. Allocated memory is still 119.5MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:03:36,480 INFO L158 Benchmark]: RCFGBuilder took 437.22ms. Allocated memory is still 119.5MB. Free memory was 80.8MB in the beginning and 62.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-12 10:03:36,480 INFO L158 Benchmark]: TraceAbstraction took 35240.35ms. Allocated memory was 119.5MB in the beginning and 13.7GB in the end (delta: 13.6GB). Free memory was 61.4MB in the beginning and 11.6GB in the end (delta: -11.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. [2022-07-12 10:03:36,480 INFO L158 Benchmark]: Witness Printer took 85.15ms. Allocated memory is still 13.7GB. Free memory was 11.6GB in the beginning and 11.6GB in the end (delta: 21.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-12 10:03:36,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 551.82ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 53.7MB in the beginning and 84.3MB in the end (delta: -30.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.68ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 82.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.82ms. Allocated memory is still 119.5MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 437.22ms. Allocated memory is still 119.5MB. Free memory was 80.8MB in the beginning and 62.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 35240.35ms. Allocated memory was 119.5MB in the beginning and 13.7GB in the end (delta: 13.6GB). Free memory was 61.4MB in the beginning and 11.6GB in the end (delta: -11.6GB). Peak memory consumption was 2.0GB. Max. memory is 16.1GB. * Witness Printer took 85.15ms. Allocated memory is still 13.7GB. Free memory was 11.6GB in the beginning and 11.6GB in the end (delta: 21.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 716]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L689] 0 int g0 = 0,g1 = 0,x = 0; VAL [g0=0, g1=0, x=0] [L690] 0 _Bool lock = 0; VAL [g0=0, g1=0, lock=0, x=0] [L691] 0 int mutex = 0; VAL [g0=0, g1=0, lock=0, mutex=0, x=0] [L735] 0 pthread_t t; VAL [g0=0, g1=0, lock=0, mutex=0, t={3:0}, x=0] [L736] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr1, 0)=-2, t={3:0}, x=0] [L737] FCALL, FORK 0 pthread_create(&t, 0, thr2, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr2, 0)=-1, t={3:0}, x=0] [L738] COND TRUE 0 1 VAL [g0=0, g1=0, lock=0, mutex=0, t={3:0}, x=0] [L740] FCALL, FORK 0 pthread_create(&t, 0, thr3, 0) VAL [g0=0, g1=0, lock=0, mutex=0, pthread_create(&t, 0, thr3, 0)=0, t={3:0}, x=0] [L728] CALL 1 __VERIFIER_atomic_acquire() [L694] CALL 1 assume_abort_if_not(mutex==0) [L4] COND FALSE 1 !(!cond) [L694] RET 1 assume_abort_if_not(mutex==0) [L695] 1 mutex = 1 [L728] RET 1 __VERIFIER_atomic_acquire() [L729] 1 g0=1 VAL [arg={0:0}, arg={0:0}, g0=1, g1=0, lock=0, mutex=1, x=0] [L729] 1 g1=1 VAL [arg={0:0}, arg={0:0}, g0=1, g1=1, lock=0, mutex=1, x=0] [L730] CALL 1 __VERIFIER_atomic_release() [L699] CALL 1 assume_abort_if_not(mutex==1) [L4] COND FALSE 1 !(!cond) [L699] RET 1 assume_abort_if_not(mutex==1) [L700] 1 mutex = 0 [L730] RET 1 __VERIFIER_atomic_release() [L704] CALL 3 __VERIFIER_atomic_acquire() [L694] CALL 3 assume_abort_if_not(mutex==0) [L4] COND FALSE 3 !(!cond) [L694] RET 3 assume_abort_if_not(mutex==0) [L695] 3 mutex = 1 [L704] RET 3 __VERIFIER_atomic_acquire() [L705] COND TRUE 3 __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, arg={0:0}, arg={0:0}, g0=1, g1=1, lock=0, mutex=1, x=0] [L707] 3 g0=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=1, lock=0, mutex=1, x=0] [L708] 3 g1=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=0, mutex=1, x=0] [L709] 3 lock=0 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=0, mutex=1, x=0] [L711] CALL 3 __VERIFIER_atomic_release() [L699] CALL 3 assume_abort_if_not(mutex==1) [L4] COND FALSE 3 !(!cond) [L699] RET 3 assume_abort_if_not(mutex==1) [L700] 3 mutex = 0 [L711] RET 3 __VERIFIER_atomic_release() [L712] CALL 3 __VERIFIER_atomic_acquire() [L694] CALL 3 assume_abort_if_not(mutex==0) [L4] COND FALSE 3 !(!cond) [L694] RET 3 assume_abort_if_not(mutex==0) [L695] 3 mutex = 1 [L712] RET 3 __VERIFIER_atomic_acquire() [L731] 1 lock=1 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=0] [L713] COND TRUE 3 \read(lock) VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=0] [L715] 3 x=1 VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] [L716] COND TRUE 3 !(g0==1 && g1==1) VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] [L716] 3 reach_error() VAL [arg={0:0}, arg={0:0}, g0=0, g1=0, lock=1, mutex=1, x=1] - UnprovableResult [Line: 723]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 737]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 736]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 128 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 56 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 135 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 316 IncrementalHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 36 mSDtfsCounter, 316 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=496occurred in iteration=3, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 169 locations, 9 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 192 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 66 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396 IncrementalHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 49 mSDtfsCounter, 396 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=609occurred in iteration=4, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 13 procedures, 210 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.6s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 28.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 284 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 284 mSDsluCounter, 99 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271 mSDsCounter, 116 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 642 IncrementalHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 116 mSolverCounterUnsat, 67 mSDtfsCounter, 642 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=801occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 321 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-12 10:03:36,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE