./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:04:48,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:04:48,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:04:48,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:04:48,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:04:48,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:04:48,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:04:48,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:04:48,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:04:48,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:04:48,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:04:48,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:04:48,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:04:48,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:04:48,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:04:48,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:04:48,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:04:48,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:04:48,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:04:48,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:04:48,650 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:04:48,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:04:48,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:04:48,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:04:48,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:04:48,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:04:48,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:04:48,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:04:48,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:04:48,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:04:48,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:04:48,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:04:48,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:04:48,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:04:48,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:04:48,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:04:48,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:04:48,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:04:48,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:04:48,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:04:48,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:04:48,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:04:48,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:04:48,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:04:48,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:04:48,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:04:48,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:04:48,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:04:48,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:04:48,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:04:48,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:04:48,680 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:04:48,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:04:48,680 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:04:48,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:04:48,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:04:48,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:04:48,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:04:48,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:04:48,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:04:48,682 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:04:48,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:04:48,682 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:04:48,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:04:48,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:04:48,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:04:48,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:04:48,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:48,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:04:48,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:04:48,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:04:48,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-07-19 21:04:48,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:04:48,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:04:48,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:04:48,906 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:04:48,906 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:04:48,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-07-19 21:04:48,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b1c5e0/422dc33d52234ce5966ebadf65eb9fda/FLAGad73b393d [2022-07-19 21:04:49,314 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:04:49,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-07-19 21:04:49,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b1c5e0/422dc33d52234ce5966ebadf65eb9fda/FLAGad73b393d [2022-07-19 21:04:49,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4b1c5e0/422dc33d52234ce5966ebadf65eb9fda [2022-07-19 21:04:49,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:04:49,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:04:49,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:49,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:04:49,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:04:49,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:49" (1/1) ... [2022-07-19 21:04:49,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fa9699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:49, skipping insertion in model container [2022-07-19 21:04:49,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:49" (1/1) ... [2022-07-19 21:04:49,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:04:49,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:04:49,979 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-07-19 21:04:49,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:49,992 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:04:50,053 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-07-19 21:04:50,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:50,093 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:04:50,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50 WrapperNode [2022-07-19 21:04:50,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:50,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:50,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:04:50,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:04:50,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,146 INFO L137 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-07-19 21:04:50,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:50,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:04:50,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:04:50,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:04:50,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:04:50,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:04:50,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:04:50,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:04:50,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:50,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:04:50,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:04:50,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:04:50,346 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:04:50,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:04:50,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:04:50,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:04:50,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:04:50,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:04:50,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:04:50,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:04:50,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:04:50,348 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:04:50,442 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:04:50,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:04:50,575 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:04:50,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:04:50,609 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:04:50,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:50 BoogieIcfgContainer [2022-07-19 21:04:50,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:04:50,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:04:50,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:04:50,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:04:50,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:04:49" (1/3) ... [2022-07-19 21:04:50,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268eda05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:50, skipping insertion in model container [2022-07-19 21:04:50,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (2/3) ... [2022-07-19 21:04:50,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268eda05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:50, skipping insertion in model container [2022-07-19 21:04:50,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:50" (3/3) ... [2022-07-19 21:04:50,624 INFO L111 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-07-19 21:04:50,631 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:04:50,638 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:04:50,638 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:04:50,638 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:04:50,708 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:50,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-07-19 21:04:50,791 INFO L129 PetriNetUnfolder]: 10/108 cut-off events. [2022-07-19 21:04:50,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:50,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 10/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 132 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-07-19 21:04:50,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 199 flow [2022-07-19 21:04:50,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 97 transitions, 199 flow [2022-07-19 21:04:50,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:50,824 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:50,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:04:50,831 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2022-07-19 21:04:50,831 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:50,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:50,832 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] [2022-07-19 21:04:50,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:04:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash 875002773, now seen corresponding path program 1 times [2022-07-19 21:04:50,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:50,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162724932] [2022-07-19 21:04:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:50,946 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:50,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:50,979 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:50,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:04:50,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:04:50,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:04:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:04:50,982 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:04:50,984 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:50,984 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:04:51,009 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:51,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-07-19 21:04:51,044 INFO L129 PetriNetUnfolder]: 19/186 cut-off events. [2022-07-19 21:04:51,044 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:51,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 19/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 436 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-07-19 21:04:51,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 162 transitions, 336 flow [2022-07-19 21:04:51,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 162 transitions, 336 flow [2022-07-19 21:04:51,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:51,051 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:51,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:04:51,061 INFO L129 PetriNetUnfolder]: 5/85 cut-off events. [2022-07-19 21:04:51,061 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:51,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:51,061 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] [2022-07-19 21:04:51,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:04:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash 766098187, now seen corresponding path program 1 times [2022-07-19 21:04:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:51,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693071584] [2022-07-19 21:04:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:51,085 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:51,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:51,103 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:51,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:04:51,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:04:51,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:04:51,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:04:51,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:04:51,105 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:04:51,105 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:51,106 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:04:51,137 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:51,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-07-19 21:04:51,170 INFO L129 PetriNetUnfolder]: 28/264 cut-off events. [2022-07-19 21:04:51,170 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:04:51,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 28/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 813 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-07-19 21:04:51,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 227 transitions, 475 flow [2022-07-19 21:04:51,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 475 flow [2022-07-19 21:04:51,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:51,179 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:51,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:04:51,205 INFO L129 PetriNetUnfolder]: 10/139 cut-off events. [2022-07-19 21:04:51,205 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:04:51,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:51,206 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:51,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:04:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1683144780, now seen corresponding path program 1 times [2022-07-19 21:04:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820691141] [2022-07-19 21:04:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:51,226 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:51,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:51,246 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:51,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:04:51,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:04:51,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:04:51,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:04:51,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:04:51,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:04:51,248 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:04:51,248 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:51,248 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:04:51,281 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:51,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-07-19 21:04:51,346 INFO L129 PetriNetUnfolder]: 37/342 cut-off events. [2022-07-19 21:04:51,347 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:04:51,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 37/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1222 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2022-07-19 21:04:51,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 292 transitions, 616 flow [2022-07-19 21:04:51,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 292 transitions, 616 flow [2022-07-19 21:04:51,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:51,355 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:51,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:04:51,368 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-19 21:04:51,368 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:04:51,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:51,368 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:51,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:04:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1762984080, now seen corresponding path program 1 times [2022-07-19 21:04:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:51,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866309427] [2022-07-19 21:04:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:51,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866309427] [2022-07-19 21:04:51,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866309427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:51,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:51,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:04:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791319862] [2022-07-19 21:04:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:51,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:04:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:04:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:04:51,446 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 292 [2022-07-19 21:04:51,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 616 flow. Second operand has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:51,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 292 [2022-07-19 21:04:51,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:51,863 INFO L129 PetriNetUnfolder]: 324/2573 cut-off events. [2022-07-19 21:04:51,863 INFO L130 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-07-19 21:04:51,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 2573 events. 324/2573 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 21511 event pairs, 204 based on Foata normal form. 663/3046 useless extension candidates. Maximal degree in co-relation 988. Up to 325 conditions per place. [2022-07-19 21:04:51,897 INFO L132 encePairwiseOnDemand]: 266/292 looper letters, 12 selfloop transitions, 0 changer transitions 0/233 dead transitions. [2022-07-19 21:04:51,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 522 flow [2022-07-19 21:04:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:04:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:04:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 538 transitions. [2022-07-19 21:04:51,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9212328767123288 [2022-07-19 21:04:51,912 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 538 transitions. [2022-07-19 21:04:51,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 538 transitions. [2022-07-19 21:04:51,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:51,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 538 transitions. [2022-07-19 21:04:51,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 269.0) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,925 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,926 INFO L186 Difference]: Start difference. First operand has 268 places, 292 transitions, 616 flow. Second operand 2 states and 538 transitions. [2022-07-19 21:04:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 522 flow [2022-07-19 21:04:51,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 233 transitions, 510 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:04:51,936 INFO L242 Difference]: Finished difference. Result has 231 places, 233 transitions, 486 flow [2022-07-19 21:04:51,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=486, PETRI_PLACES=231, PETRI_TRANSITIONS=233} [2022-07-19 21:04:51,939 INFO L279 CegarLoopForPetriNet]: 268 programPoint places, -37 predicate places. [2022-07-19 21:04:51,940 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 233 transitions, 486 flow [2022-07-19 21:04:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:51,941 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:51,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:04:51,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:04:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1514932111, now seen corresponding path program 1 times [2022-07-19 21:04:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:51,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192061381] [2022-07-19 21:04:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:51,984 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:52,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:52,022 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:52,022 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:04:52,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:04:52,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:04:52,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:04:52,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:04:52,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:04:52,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:04:52,024 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:04:52,026 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:52,026 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:04:52,094 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:52,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-07-19 21:04:52,184 INFO L129 PetriNetUnfolder]: 46/420 cut-off events. [2022-07-19 21:04:52,184 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:04:52,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 46/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1647 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2022-07-19 21:04:52,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 357 transitions, 759 flow [2022-07-19 21:04:52,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 357 transitions, 759 flow [2022-07-19 21:04:52,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:52,201 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:52,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:04:52,214 INFO L129 PetriNetUnfolder]: 16/195 cut-off events. [2022-07-19 21:04:52,214 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:04:52,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:52,215 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] [2022-07-19 21:04:52,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:04:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash -395470315, now seen corresponding path program 1 times [2022-07-19 21:04:52,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:52,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502320208] [2022-07-19 21:04:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:52,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:52,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502320208] [2022-07-19 21:04:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502320208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:52,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:52,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:04:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561335434] [2022-07-19 21:04:52,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:04:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:52,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:04:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:04:52,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 357 [2022-07-19 21:04:52,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 357 transitions, 759 flow. Second operand has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:52,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 357 [2022-07-19 21:04:52,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:53,696 INFO L129 PetriNetUnfolder]: 1215/7973 cut-off events. [2022-07-19 21:04:53,696 INFO L130 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-07-19 21:04:53,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 7973 events. 1215/7973 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 86237 event pairs, 852 based on Foata normal form. 2472/9868 useless extension candidates. Maximal degree in co-relation 3238. Up to 1216 conditions per place. [2022-07-19 21:04:53,846 INFO L132 encePairwiseOnDemand]: 325/357 looper letters, 15 selfloop transitions, 0 changer transitions 0/285 dead transitions. [2022-07-19 21:04:53,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 645 flow [2022-07-19 21:04:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:04:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:04:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 657 transitions. [2022-07-19 21:04:53,848 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9201680672268907 [2022-07-19 21:04:53,848 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 657 transitions. [2022-07-19 21:04:53,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 657 transitions. [2022-07-19 21:04:53,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:53,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 657 transitions. [2022-07-19 21:04:53,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,852 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,852 INFO L186 Difference]: Start difference. First operand has 327 places, 357 transitions, 759 flow. Second operand 2 states and 657 transitions. [2022-07-19 21:04:53,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 285 transitions, 645 flow [2022-07-19 21:04:53,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 285 transitions, 625 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:04:53,870 INFO L242 Difference]: Finished difference. Result has 282 places, 285 transitions, 595 flow [2022-07-19 21:04:53,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=595, PETRI_PLACES=282, PETRI_TRANSITIONS=285} [2022-07-19 21:04:53,871 INFO L279 CegarLoopForPetriNet]: 327 programPoint places, -45 predicate places. [2022-07-19 21:04:53,871 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 595 flow [2022-07-19 21:04:53,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:53,872 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:53,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:04:53,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:04:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1565058835, now seen corresponding path program 1 times [2022-07-19 21:04:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153253886] [2022-07-19 21:04:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:53,903 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:53,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:53,941 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:53,941 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:04:53,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:04:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:04:53,943 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:04:53,943 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:53,943 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:04:54,047 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:54,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 904 flow [2022-07-19 21:04:54,115 INFO L129 PetriNetUnfolder]: 55/498 cut-off events. [2022-07-19 21:04:54,115 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:04:54,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 55/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2057 event pairs, 0 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2022-07-19 21:04:54,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 904 flow [2022-07-19 21:04:54,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 904 flow [2022-07-19 21:04:54,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:54,141 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@9e0d1b9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b8a1853 [2022-07-19 21:04:54,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-19 21:04:54,154 INFO L129 PetriNetUnfolder]: 17/192 cut-off events. [2022-07-19 21:04:54,154 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:04:54,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:54,155 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] [2022-07-19 21:04:54,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:04:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash 301484826, now seen corresponding path program 1 times [2022-07-19 21:04:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:54,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378307137] [2022-07-19 21:04:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:54,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378307137] [2022-07-19 21:04:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378307137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:54,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:54,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:04:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231095149] [2022-07-19 21:04:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:04:54,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:04:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:04:54,188 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 422 [2022-07-19 21:04:54,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:54,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:54,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 422 [2022-07-19 21:04:54,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:59,308 INFO L129 PetriNetUnfolder]: 4374/24659 cut-off events. [2022-07-19 21:04:59,308 INFO L130 PetriNetUnfolder]: For 10297/10297 co-relation queries the response was YES. [2022-07-19 21:04:59,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32868 conditions, 24659 events. 4374/24659 cut-off events. For 10297/10297 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 319107 event pairs, 3282 based on Foata normal form. 8871/31792 useless extension candidates. Maximal degree in co-relation 10447. Up to 4375 conditions per place. [2022-07-19 21:05:00,010 INFO L132 encePairwiseOnDemand]: 384/422 looper letters, 18 selfloop transitions, 0 changer transitions 0/337 dead transitions. [2022-07-19 21:05:00,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 770 flow [2022-07-19 21:05:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:05:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:05:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 776 transitions. [2022-07-19 21:05:00,012 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.919431279620853 [2022-07-19 21:05:00,012 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 776 transitions. [2022-07-19 21:05:00,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 776 transitions. [2022-07-19 21:05:00,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:05:00,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 776 transitions. [2022-07-19 21:05:00,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 388.0) internal successors, (776), 2 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,016 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,017 INFO L186 Difference]: Start difference. First operand has 386 places, 422 transitions, 904 flow. Second operand 2 states and 776 transitions. [2022-07-19 21:05:00,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 770 flow [2022-07-19 21:05:00,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 337 transitions, 740 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-19 21:05:00,032 INFO L242 Difference]: Finished difference. Result has 333 places, 337 transitions, 704 flow [2022-07-19 21:05:00,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=704, PETRI_PLACES=333, PETRI_TRANSITIONS=337} [2022-07-19 21:05:00,034 INFO L279 CegarLoopForPetriNet]: 386 programPoint places, -53 predicate places. [2022-07-19 21:05:00,034 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 337 transitions, 704 flow [2022-07-19 21:05:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,036 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:05:00,036 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:05:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:05:00,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:05:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:05:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 117715470, now seen corresponding path program 1 times [2022-07-19 21:05:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:05:00,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745353715] [2022-07-19 21:05:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:05:00,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:05:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:05:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:05:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:05:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745353715] [2022-07-19 21:05:00,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745353715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:05:00,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:05:00,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:05:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740392028] [2022-07-19 21:05:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:05:00,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:05:00,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:05:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:05:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:05:00,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 422 [2022-07-19 21:05:00,335 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 337 transitions, 704 flow. Second operand has 13 states, 13 states have (on average 292.38461538461536) internal successors, (3801), 13 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:05:00,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 422 [2022-07-19 21:05:00,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand