./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/weaver/popl20-queue-add-2.wvr.c -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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:55:27,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:55:27,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:55:27,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:55:27,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:55:27,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:55:27,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:55:27,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:55:27,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:55:27,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:55:27,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:55:27,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:55:27,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:55:27,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:55:27,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:55:27,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:55:27,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:55:27,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:55:27,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:55:27,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:55:27,034 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:55:27,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:55:27,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:55:27,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:55:27,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:55:27,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:55:27,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:55:27,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:55:27,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:55:27,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:55:27,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:55:27,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:55:27,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:55:27,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:55:27,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:55:27,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:55:27,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:55:27,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:55:27,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:55:27,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:55:27,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:55:27,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:55:27,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:55:27,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:55:27,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:55:27,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:55:27,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:55:27,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:55:27,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:55:27,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:55:27,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:55:27,061 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:55:27,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:55:27,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:55:27,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:55:27,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:27,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:55:27,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:55:27,065 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:55:27,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:55:27,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:55:27,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-07-22 21:55:27,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:55:27,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:55:27,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:55:27,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:55:27,326 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:55:27,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-07-22 21:55:27,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3daed25c/85e999210f864395b23235fb0907456a/FLAG307a53605 [2022-07-22 21:55:27,732 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:55:27,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-07-22 21:55:27,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3daed25c/85e999210f864395b23235fb0907456a/FLAG307a53605 [2022-07-22 21:55:27,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3daed25c/85e999210f864395b23235fb0907456a [2022-07-22 21:55:27,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:55:27,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:55:27,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:27,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:55:27,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:55:27,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:27" (1/1) ... [2022-07-22 21:55:27,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7129b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:27, skipping insertion in model container [2022-07-22 21:55:27,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:27" (1/1) ... [2022-07-22 21:55:27,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:55:27,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:55:27,970 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/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-07-22 21:55:27,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:27,980 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:55:27,995 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/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-07-22 21:55:27,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:28,006 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:55:28,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28 WrapperNode [2022-07-22 21:55:28,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:28,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:28,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:55:28,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:55:28,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,035 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-07-22 21:55:28,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:28,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:55:28,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:55:28,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:55:28,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:55:28,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:55:28,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:55:28,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:55:28,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (1/1) ... [2022-07-22 21:55:28,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:28,101 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) [2022-07-22 21:55:28,103 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 [2022-07-22 21:55:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:55:28,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:55:28,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:55:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:55:28,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:55:28,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:55:28,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:55:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:55:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:55:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:55:28,144 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:55:28,249 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:55:28,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:55:28,482 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:55:28,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:55:28,540 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:55:28,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:28 BoogieIcfgContainer [2022-07-22 21:55:28,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:55:28,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:55:28,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:55:28,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:55:28,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:55:27" (1/3) ... [2022-07-22 21:55:28,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1520f575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:28, skipping insertion in model container [2022-07-22 21:55:28,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:28" (2/3) ... [2022-07-22 21:55:28,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1520f575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:28, skipping insertion in model container [2022-07-22 21:55:28,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:28" (3/3) ... [2022-07-22 21:55:28,548 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-07-22 21:55:28,552 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:55:28,559 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:55:28,559 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:55:28,559 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:55:28,595 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:55:28,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-07-22 21:55:28,659 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2022-07-22 21:55:28,659 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:55:28,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-07-22 21:55:28,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-07-22 21:55:28,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-07-22 21:55:28,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:55:28,686 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@7e04cf19, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6988fbfc [2022-07-22 21:55:28,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:55:28,703 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2022-07-22 21:55:28,703 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:55:28,703 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:28,704 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:28,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 47431826, now seen corresponding path program 1 times [2022-07-22 21:55:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:28,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507429977] [2022-07-22 21:55:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:28,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:28,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507429977] [2022-07-22 21:55:28,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507429977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:28,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:28,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:55:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632434569] [2022-07-22 21:55:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:28,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:55:28,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:55:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:55:28,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-07-22 21:55:28,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-07-22 21:55:28,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:28,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-07-22 21:55:28,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:28,954 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2022-07-22 21:55:28,958 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-22 21:55:28,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 167 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-07-22 21:55:28,961 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-07-22 21:55:28,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-07-22 21:55:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:55:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:55:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-07-22 21:55:28,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-07-22 21:55:28,974 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-07-22 21:55:28,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-07-22 21:55:28,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:28,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-07-22 21:55:28,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 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) [2022-07-22 21:55:28,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-07-22 21:55:28,991 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-07-22 21:55:28,992 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-07-22 21:55:28,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-07-22 21:55:28,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:29,001 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-07-22 21:55:29,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-07-22 21:55:29,006 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-07-22 21:55:29,006 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-07-22 21:55:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-07-22 21:55:29,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:29,007 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:55:29,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2022-07-22 21:55:29,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119687692] [2022-07-22 21:55:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:29,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119687692] [2022-07-22 21:55:29,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119687692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:29,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:29,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:55:29,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531454510] [2022-07-22 21:55:29,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:55:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:55:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:55:29,245 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-07-22 21:55:29,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-07-22 21:55:29,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:29,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-07-22 21:55:29,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:29,366 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2022-07-22 21:55:29,366 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:55:29,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 244 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-07-22 21:55:29,368 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-07-22 21:55:29,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-07-22 21:55:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:55:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:55:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-07-22 21:55:29,377 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-07-22 21:55:29,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-07-22 21:55:29,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-07-22 21:55:29,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:29,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-07-22 21:55:29,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 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) [2022-07-22 21:55:29,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-07-22 21:55:29,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-07-22 21:55:29,383 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-07-22 21:55:29,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-07-22 21:55:29,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:55:29,387 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-07-22 21:55:29,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-07-22 21:55:29,388 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-07-22 21:55:29,388 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-07-22 21:55:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-07-22 21:55:29,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:29,389 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:55:29,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-07-22 21:55:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:29,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464385490] [2022-07-22 21:55:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:29,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464385490] [2022-07-22 21:55:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464385490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:29,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:29,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:55:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179715571] [2022-07-22 21:55:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:55:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:55:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:55:29,508 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-07-22 21:55:29,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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) [2022-07-22 21:55:29,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:29,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-07-22 21:55:29,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:29,537 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-22 21:55:29,538 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-22 21:55:29,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-07-22 21:55:29,539 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-07-22 21:55:29,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-07-22 21:55:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:55:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:55:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-07-22 21:55:29,541 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-07-22 21:55:29,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-07-22 21:55:29,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-07-22 21:55:29,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:29,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-07-22 21:55:29,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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) [2022-07-22 21:55:29,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-07-22 21:55:29,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-07-22 21:55:29,544 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-07-22 21:55:29,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-07-22 21:55:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:29,549 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-07-22 21:55:29,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-07-22 21:55:29,551 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-07-22 21:55:29,551 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-07-22 21:55:29,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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) [2022-07-22 21:55:29,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:29,552 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:55:29,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1451650874, now seen corresponding path program 2 times [2022-07-22 21:55:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404432483] [2022-07-22 21:55:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:29,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404432483] [2022-07-22 21:55:29,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404432483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:29,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:29,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:55:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511752639] [2022-07-22 21:55:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:55:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:55:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:55:29,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-07-22 21:55:29,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:29,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:29,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-07-22 21:55:29,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:30,042 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2022-07-22 21:55:30,042 INFO L130 PetriNetUnfolder]: For 109/117 co-relation queries the response was YES. [2022-07-22 21:55:30,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 109/117 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1202 event pairs, 20 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-07-22 21:55:30,044 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-07-22 21:55:30,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-07-22 21:55:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:55:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:55:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-07-22 21:55:30,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-07-22 21:55:30,047 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-07-22 21:55:30,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-07-22 21:55:30,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:30,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-07-22 21:55:30,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 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) [2022-07-22 21:55:30,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 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) [2022-07-22 21:55:30,054 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 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) [2022-07-22 21:55:30,054 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-07-22 21:55:30,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-07-22 21:55:30,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-07-22 21:55:30,057 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-07-22 21:55:30,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-07-22 21:55:30,058 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-07-22 21:55:30,058 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-07-22 21:55:30,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:30,058 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:30,059 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:30,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:55:30,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2022-07-22 21:55:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757719475] [2022-07-22 21:55:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:30,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757719475] [2022-07-22 21:55:30,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757719475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635824142] [2022-07-22 21:55:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:30,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:30,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:30,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:55:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:55:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:30,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:55:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635824142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:30,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:55:30,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-22 21:55:30,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713630773] [2022-07-22 21:55:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:30,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:55:30,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:55:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:55:30,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-07-22 21:55:30,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-07-22 21:55:30,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:30,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-07-22 21:55:30,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:30,355 INFO L129 PetriNetUnfolder]: 26/272 cut-off events. [2022-07-22 21:55:30,355 INFO L130 PetriNetUnfolder]: For 81/96 co-relation queries the response was YES. [2022-07-22 21:55:30,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 272 events. 26/272 cut-off events. For 81/96 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 829 event pairs, 2 based on Foata normal form. 6/274 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-07-22 21:55:30,356 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-07-22 21:55:30,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-07-22 21:55:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:55:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:55:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-07-22 21:55:30,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-07-22 21:55:30,358 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-07-22 21:55:30,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-07-22 21:55:30,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:30,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-07-22 21:55:30,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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) [2022-07-22 21:55:30,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-07-22 21:55:30,360 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-07-22 21:55:30,360 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-07-22 21:55:30,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-07-22 21:55:30,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-22 21:55:30,363 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-07-22 21:55:30,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-07-22 21:55:30,363 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-07-22 21:55:30,363 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-07-22 21:55:30,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-07-22 21:55:30,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:30,364 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:30,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:30,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:30,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1196258915, now seen corresponding path program 1 times [2022-07-22 21:55:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:30,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148476488] [2022-07-22 21:55:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:30,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148476488] [2022-07-22 21:55:30,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148476488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411892094] [2022-07-22 21:55:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:30,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:30,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:30,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:55:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411892094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:31,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:31,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:55:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794427121] [2022-07-22 21:55:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:55:31,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-07-22 21:55:31,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 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) [2022-07-22 21:55:31,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:31,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-07-22 21:55:31,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:31,341 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2022-07-22 21:55:31,341 INFO L130 PetriNetUnfolder]: For 213/252 co-relation queries the response was YES. [2022-07-22 21:55:31,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 315 events. 26/315 cut-off events. For 213/252 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 921 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 565. Up to 54 conditions per place. [2022-07-22 21:55:31,343 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-07-22 21:55:31,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-07-22 21:55:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:55:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:55:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-07-22 21:55:31,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-07-22 21:55:31,346 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-07-22 21:55:31,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-07-22 21:55:31,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:31,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-07-22 21:55:31,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 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) [2022-07-22 21:55:31,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-07-22 21:55:31,352 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-07-22 21:55:31,352 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-07-22 21:55:31,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-07-22 21:55:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-22 21:55:31,358 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-07-22 21:55:31,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-07-22 21:55:31,361 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-07-22 21:55:31,361 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-07-22 21:55:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 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) [2022-07-22 21:55:31,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:31,362 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:31,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:55:31,579 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1901575578, now seen corresponding path program 2 times [2022-07-22 21:55:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:31,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417376442] [2022-07-22 21:55:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:31,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417376442] [2022-07-22 21:55:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417376442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045004277] [2022-07-22 21:55:32,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:32,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:32,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:32,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:32,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:55:32,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:32,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 21:55:32,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:32,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:55:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:32,912 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:55:32,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-22 21:55:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045004277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:33,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:33,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 42 [2022-07-22 21:55:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462972690] [2022-07-22 21:55:33,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 21:55:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 21:55:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 21:55:33,535 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 136 [2022-07-22 21:55:33,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 42 states, 42 states have (on average 84.92857142857143) internal successors, (3567), 42 states have internal predecessors, (3567), 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) [2022-07-22 21:55:33,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:33,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 136 [2022-07-22 21:55:33,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:36,059 INFO L129 PetriNetUnfolder]: 750/2362 cut-off events. [2022-07-22 21:55:36,059 INFO L130 PetriNetUnfolder]: For 2478/2594 co-relation queries the response was YES. [2022-07-22 21:55:36,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 2362 events. 750/2362 cut-off events. For 2478/2594 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18397 event pairs, 109 based on Foata normal form. 40/2316 useless extension candidates. Maximal degree in co-relation 5584. Up to 401 conditions per place. [2022-07-22 21:55:36,072 INFO L132 encePairwiseOnDemand]: 113/136 looper letters, 177 selfloop transitions, 71 changer transitions 0/317 dead transitions. [2022-07-22 21:55:36,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 317 transitions, 1717 flow [2022-07-22 21:55:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:55:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:55:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3330 transitions. [2022-07-22 21:55:36,078 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6443498452012384 [2022-07-22 21:55:36,078 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3330 transitions. [2022-07-22 21:55:36,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3330 transitions. [2022-07-22 21:55:36,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:36,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3330 transitions. [2022-07-22 21:55:36,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 87.63157894736842) internal successors, (3330), 38 states have internal predecessors, (3330), 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) [2022-07-22 21:55:36,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 136.0) internal successors, (5304), 39 states have internal predecessors, (5304), 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) [2022-07-22 21:55:36,092 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 136.0) internal successors, (5304), 39 states have internal predecessors, (5304), 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) [2022-07-22 21:55:36,093 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 38 states and 3330 transitions. [2022-07-22 21:55:36,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 317 transitions, 1717 flow [2022-07-22 21:55:36,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 317 transitions, 1646 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-07-22 21:55:36,101 INFO L242 Difference]: Finished difference. Result has 195 places, 190 transitions, 1055 flow [2022-07-22 21:55:36,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1055, PETRI_PLACES=195, PETRI_TRANSITIONS=190} [2022-07-22 21:55:36,102 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 74 predicate places. [2022-07-22 21:55:36,102 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 190 transitions, 1055 flow [2022-07-22 21:55:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 84.92857142857143) internal successors, (3567), 42 states have internal predecessors, (3567), 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) [2022-07-22 21:55:36,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:36,103 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:36,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:36,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:36,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1475203064, now seen corresponding path program 3 times [2022-07-22 21:55:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:36,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671409213] [2022-07-22 21:55:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671409213] [2022-07-22 21:55:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671409213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208894209] [2022-07-22 21:55:37,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:37,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:37,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:55:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:55:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:37,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 21:55:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:55:37,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-22 21:55:37,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:55:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:37,597 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_149 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_149) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-07-22 21:55:37,614 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:55:37,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-07-22 21:55:37,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-22 21:55:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:55:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208894209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:37,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:37,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 43 [2022-07-22 21:55:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061321541] [2022-07-22 21:55:37,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 21:55:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 21:55:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1614, Unknown=1, NotChecked=80, Total=1806 [2022-07-22 21:55:37,997 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:55:37,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 190 transitions, 1055 flow. Second operand has 43 states, 43 states have (on average 58.651162790697676) internal successors, (2522), 43 states have internal predecessors, (2522), 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) [2022-07-22 21:55:37,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:37,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:55:37,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:41,089 INFO L129 PetriNetUnfolder]: 1107/3160 cut-off events. [2022-07-22 21:55:41,089 INFO L130 PetriNetUnfolder]: For 18006/18538 co-relation queries the response was YES. [2022-07-22 21:55:41,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 3160 events. 1107/3160 cut-off events. For 18006/18538 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 25330 event pairs, 189 based on Foata normal form. 192/3194 useless extension candidates. Maximal degree in co-relation 10904. Up to 627 conditions per place. [2022-07-22 21:55:41,118 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 197 selfloop transitions, 96 changer transitions 0/342 dead transitions. [2022-07-22 21:55:41,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 342 transitions, 2745 flow [2022-07-22 21:55:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 21:55:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-22 21:55:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2550 transitions. [2022-07-22 21:55:41,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2022-07-22 21:55:41,127 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2550 transitions. [2022-07-22 21:55:41,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2550 transitions. [2022-07-22 21:55:41,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:41,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2550 transitions. [2022-07-22 21:55:41,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 59.30232558139535) internal successors, (2550), 43 states have internal predecessors, (2550), 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) [2022-07-22 21:55:41,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 136.0) internal successors, (5984), 44 states have internal predecessors, (5984), 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) [2022-07-22 21:55:41,142 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 136.0) internal successors, (5984), 44 states have internal predecessors, (5984), 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) [2022-07-22 21:55:41,142 INFO L186 Difference]: Start difference. First operand has 195 places, 190 transitions, 1055 flow. Second operand 43 states and 2550 transitions. [2022-07-22 21:55:41,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 342 transitions, 2745 flow [2022-07-22 21:55:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 342 transitions, 2579 flow, removed 70 selfloop flow, removed 12 redundant places. [2022-07-22 21:55:41,172 INFO L242 Difference]: Finished difference. Result has 233 places, 230 transitions, 1646 flow [2022-07-22 21:55:41,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1646, PETRI_PLACES=233, PETRI_TRANSITIONS=230} [2022-07-22 21:55:41,175 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 112 predicate places. [2022-07-22 21:55:41,176 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 230 transitions, 1646 flow [2022-07-22 21:55:41,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 58.651162790697676) internal successors, (2522), 43 states have internal predecessors, (2522), 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) [2022-07-22 21:55:41,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:41,177 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:41,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:41,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:41,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -396103034, now seen corresponding path program 1 times [2022-07-22 21:55:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:41,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912535923] [2022-07-22 21:55:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:42,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912535923] [2022-07-22 21:55:42,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912535923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282426770] [2022-07-22 21:55:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:42,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:42,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:42,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:55:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:42,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 21:55:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:43,510 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:55:43,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-22 21:55:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:43,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:43,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:55:43,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2022-07-22 21:55:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:45,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282426770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:45,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 67 [2022-07-22 21:55:45,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266325587] [2022-07-22 21:55:45,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 21:55:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 21:55:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3924, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 21:55:45,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:55:45,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 230 transitions, 1646 flow. Second operand has 67 states, 67 states have (on average 57.865671641791046) internal successors, (3877), 67 states have internal predecessors, (3877), 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) [2022-07-22 21:55:45,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:45,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:55:45,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:51,605 INFO L129 PetriNetUnfolder]: 5296/10565 cut-off events. [2022-07-22 21:55:51,607 INFO L130 PetriNetUnfolder]: For 62154/62162 co-relation queries the response was YES. [2022-07-22 21:55:51,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40197 conditions, 10565 events. 5296/10565 cut-off events. For 62154/62162 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 88169 event pairs, 530 based on Foata normal form. 13/10539 useless extension candidates. Maximal degree in co-relation 40152. Up to 3015 conditions per place. [2022-07-22 21:55:51,770 INFO L132 encePairwiseOnDemand]: 100/136 looper letters, 467 selfloop transitions, 281 changer transitions 44/837 dead transitions. [2022-07-22 21:55:51,771 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 837 transitions, 7262 flow [2022-07-22 21:55:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-22 21:55:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-22 21:55:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5476 transitions. [2022-07-22 21:55:51,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4473856209150327 [2022-07-22 21:55:51,777 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5476 transitions. [2022-07-22 21:55:51,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5476 transitions. [2022-07-22 21:55:51,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:51,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5476 transitions. [2022-07-22 21:55:51,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 60.84444444444444) internal successors, (5476), 90 states have internal predecessors, (5476), 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) [2022-07-22 21:55:51,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 136.0) internal successors, (12376), 91 states have internal predecessors, (12376), 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) [2022-07-22 21:55:51,811 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 136.0) internal successors, (12376), 91 states have internal predecessors, (12376), 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) [2022-07-22 21:55:51,812 INFO L186 Difference]: Start difference. First operand has 233 places, 230 transitions, 1646 flow. Second operand 90 states and 5476 transitions. [2022-07-22 21:55:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 837 transitions, 7262 flow [2022-07-22 21:55:51,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 837 transitions, 7064 flow, removed 70 selfloop flow, removed 26 redundant places. [2022-07-22 21:55:51,936 INFO L242 Difference]: Finished difference. Result has 325 places, 457 transitions, 4355 flow [2022-07-22 21:55:51,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=4355, PETRI_PLACES=325, PETRI_TRANSITIONS=457} [2022-07-22 21:55:51,937 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 204 predicate places. [2022-07-22 21:55:51,937 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 457 transitions, 4355 flow [2022-07-22 21:55:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 57.865671641791046) internal successors, (3877), 67 states have internal predecessors, (3877), 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) [2022-07-22 21:55:51,938 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:51,939 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:55:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:55:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:52,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:55:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 736033486, now seen corresponding path program 2 times [2022-07-22 21:55:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:52,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253929873] [2022-07-22 21:55:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:53,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253929873] [2022-07-22 21:55:53,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253929873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133814879] [2022-07-22 21:55:53,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:53,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:53,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:53,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:55:53,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:55:53,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:53,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:55:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:53,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:55:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:54,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:54,482 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:55:54,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2022-07-22 21:55:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:55:55,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133814879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:55,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:55,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 68 [2022-07-22 21:55:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199739195] [2022-07-22 21:55:55,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 21:55:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 21:55:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4011, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 21:55:55,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:55:55,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 457 transitions, 4355 flow. Second operand has 68 states, 68 states have (on average 57.80882352941177) internal successors, (3931), 68 states have internal predecessors, (3931), 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) [2022-07-22 21:55:55,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:55,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:55:55,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:22,914 INFO L129 PetriNetUnfolder]: 14512/28797 cut-off events. [2022-07-22 21:56:22,915 INFO L130 PetriNetUnfolder]: For 302333/302361 co-relation queries the response was YES. [2022-07-22 21:56:23,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145351 conditions, 28797 events. 14512/28797 cut-off events. For 302333/302361 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 283958 event pairs, 531 based on Foata normal form. 171/28923 useless extension candidates. Maximal degree in co-relation 145282. Up to 4661 conditions per place. [2022-07-22 21:56:23,511 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 954 selfloop transitions, 1897 changer transitions 123/3019 dead transitions. [2022-07-22 21:56:23,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 3019 transitions, 36925 flow [2022-07-22 21:56:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-07-22 21:56:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-07-22 21:56:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 14744 transitions. [2022-07-22 21:56:23,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4479824987846378 [2022-07-22 21:56:23,524 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 14744 transitions. [2022-07-22 21:56:23,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 14744 transitions. [2022-07-22 21:56:23,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:23,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 14744 transitions. [2022-07-22 21:56:23,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 60.925619834710744) internal successors, (14744), 242 states have internal predecessors, (14744), 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) [2022-07-22 21:56:23,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 136.0) internal successors, (33048), 243 states have internal predecessors, (33048), 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) [2022-07-22 21:56:23,580 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 136.0) internal successors, (33048), 243 states have internal predecessors, (33048), 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) [2022-07-22 21:56:23,580 INFO L186 Difference]: Start difference. First operand has 325 places, 457 transitions, 4355 flow. Second operand 242 states and 14744 transitions. [2022-07-22 21:56:23,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 3019 transitions, 36925 flow [2022-07-22 21:56:25,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 3019 transitions, 35878 flow, removed 422 selfloop flow, removed 30 redundant places. [2022-07-22 21:56:25,258 INFO L242 Difference]: Finished difference. Result has 654 places, 2252 transitions, 32196 flow [2022-07-22 21:56:25,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=32196, PETRI_PLACES=654, PETRI_TRANSITIONS=2252} [2022-07-22 21:56:25,259 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 533 predicate places. [2022-07-22 21:56:25,259 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 2252 transitions, 32196 flow [2022-07-22 21:56:25,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 57.80882352941177) internal successors, (3931), 68 states have internal predecessors, (3931), 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) [2022-07-22 21:56:25,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:25,261 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:56:25,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:56:25,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:25,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:56:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1110176104, now seen corresponding path program 3 times [2022-07-22 21:56:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:25,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357649538] [2022-07-22 21:56:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:56:26,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357649538] [2022-07-22 21:56:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357649538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222971735] [2022-07-22 21:56:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:56:26,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:26,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:56:26,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:56:26,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:56:26,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 21:56:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:27,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:56:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:56:27,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:27,417 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:27,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2022-07-22 21:56:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:56:27,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222971735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:27,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:27,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 15] total 49 [2022-07-22 21:56:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413287724] [2022-07-22 21:56:27,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 21:56:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 21:56:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2158, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 21:56:27,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:56:27,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 2252 transitions, 32196 flow. Second operand has 49 states, 49 states have (on average 57.97959183673469) internal successors, (2841), 49 states have internal predecessors, (2841), 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) [2022-07-22 21:56:27,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:27,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:56:27,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:49,434 INFO L129 PetriNetUnfolder]: 15351/30324 cut-off events. [2022-07-22 21:56:49,435 INFO L130 PetriNetUnfolder]: For 1006924/1006958 co-relation queries the response was YES. [2022-07-22 21:56:50,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 220935 conditions, 30324 events. 15351/30324 cut-off events. For 1006924/1006958 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 301954 event pairs, 1107 based on Foata normal form. 28/30246 useless extension candidates. Maximal degree in co-relation 220747. Up to 7515 conditions per place. [2022-07-22 21:56:50,362 INFO L132 encePairwiseOnDemand]: 100/136 looper letters, 1109 selfloop transitions, 1832 changer transitions 36/3022 dead transitions. [2022-07-22 21:56:50,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 3022 transitions, 50094 flow [2022-07-22 21:56:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-22 21:56:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-07-22 21:56:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4859 transitions. [2022-07-22 21:56:50,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44659926470588235 [2022-07-22 21:56:50,368 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4859 transitions. [2022-07-22 21:56:50,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4859 transitions. [2022-07-22 21:56:50,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:50,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4859 transitions. [2022-07-22 21:56:50,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 60.7375) internal successors, (4859), 80 states have internal predecessors, (4859), 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) [2022-07-22 21:56:50,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 136.0) internal successors, (11016), 81 states have internal predecessors, (11016), 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) [2022-07-22 21:56:50,381 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 136.0) internal successors, (11016), 81 states have internal predecessors, (11016), 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) [2022-07-22 21:56:50,381 INFO L186 Difference]: Start difference. First operand has 654 places, 2252 transitions, 32196 flow. Second operand 80 states and 4859 transitions. [2022-07-22 21:56:50,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 3022 transitions, 50094 flow [2022-07-22 21:57:02,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 3022 transitions, 43989 flow, removed 2966 selfloop flow, removed 58 redundant places. [2022-07-22 21:57:02,050 INFO L242 Difference]: Finished difference. Result has 681 places, 2681 transitions, 39480 flow [2022-07-22 21:57:02,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=27283, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=39480, PETRI_PLACES=681, PETRI_TRANSITIONS=2681} [2022-07-22 21:57:02,052 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 560 predicate places. [2022-07-22 21:57:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 2681 transitions, 39480 flow [2022-07-22 21:57:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 57.97959183673469) internal successors, (2841), 49 states have internal predecessors, (2841), 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) [2022-07-22 21:57:02,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:02,053 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:02,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:57:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:02,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1577197268, now seen corresponding path program 4 times [2022-07-22 21:57:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:02,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671188149] [2022-07-22 21:57:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671188149] [2022-07-22 21:57:03,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671188149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561085731] [2022-07-22 21:57:03,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:57:03,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:03,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:57:03,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:57:03,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:57:03,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:57:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:04,024 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:57:04,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-22 21:57:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:04,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:04,574 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:04,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2022-07-22 21:57:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561085731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:05,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 67 [2022-07-22 21:57:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450962678] [2022-07-22 21:57:05,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 21:57:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 21:57:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 21:57:05,509 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:57:05,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 2681 transitions, 39480 flow. Second operand has 67 states, 67 states have (on average 57.865671641791046) internal successors, (3877), 67 states have internal predecessors, (3877), 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) [2022-07-22 21:57:05,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:05,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:57:05,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:33,479 INFO L129 PetriNetUnfolder]: 17733/35258 cut-off events. [2022-07-22 21:57:33,480 INFO L130 PetriNetUnfolder]: For 1118120/1118154 co-relation queries the response was YES. [2022-07-22 21:57:34,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252273 conditions, 35258 events. 17733/35258 cut-off events. For 1118120/1118154 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 360991 event pairs, 3032 based on Foata normal form. 31/35105 useless extension candidates. Maximal degree in co-relation 252085. Up to 22634 conditions per place. [2022-07-22 21:57:34,401 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 2034 selfloop transitions, 1512 changer transitions 49/3640 dead transitions. [2022-07-22 21:57:34,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 3640 transitions, 62758 flow [2022-07-22 21:57:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-22 21:57:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-22 21:57:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4817 transitions. [2022-07-22 21:57:34,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43727305737109656 [2022-07-22 21:57:34,406 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4817 transitions. [2022-07-22 21:57:34,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4817 transitions. [2022-07-22 21:57:34,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:34,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4817 transitions. [2022-07-22 21:57:34,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 59.46913580246913) internal successors, (4817), 81 states have internal predecessors, (4817), 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) [2022-07-22 21:57:34,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 136.0) internal successors, (11152), 82 states have internal predecessors, (11152), 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) [2022-07-22 21:57:34,418 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 136.0) internal successors, (11152), 82 states have internal predecessors, (11152), 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) [2022-07-22 21:57:34,419 INFO L186 Difference]: Start difference. First operand has 681 places, 2681 transitions, 39480 flow. Second operand 81 states and 4817 transitions. [2022-07-22 21:57:34,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 3640 transitions, 62758 flow [2022-07-22 21:57:45,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 3640 transitions, 62071 flow, removed 235 selfloop flow, removed 39 redundant places. [2022-07-22 21:57:45,364 INFO L242 Difference]: Finished difference. Result has 756 places, 3397 transitions, 58265 flow [2022-07-22 21:57:45,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=38985, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=58265, PETRI_PLACES=756, PETRI_TRANSITIONS=3397} [2022-07-22 21:57:45,366 INFO L279 CegarLoopForPetriNet]: 121 programPoint places, 635 predicate places. [2022-07-22 21:57:45,367 INFO L495 AbstractCegarLoop]: Abstraction has has 756 places, 3397 transitions, 58265 flow [2022-07-22 21:57:45,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 57.865671641791046) internal successors, (3877), 67 states have internal predecessors, (3877), 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) [2022-07-22 21:57:45,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:45,368 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:45,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:45,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:57:45,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:57:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:45,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1262604616, now seen corresponding path program 5 times [2022-07-22 21:57:45,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:45,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306145482] [2022-07-22 21:57:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:45,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306145482] [2022-07-22 21:57:46,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306145482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201125517] [2022-07-22 21:57:46,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:57:46,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:46,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:57:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:57:46,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:57:46,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 21:57:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:46,943 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 21:57:46,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-07-22 21:57:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:47,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:47,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:47,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2022-07-22 21:57:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:57:47,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201125517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:47,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:47,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 16] total 53 [2022-07-22 21:57:47,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563762741] [2022-07-22 21:57:47,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:47,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 21:57:47,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 21:57:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 21:57:47,611 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-07-22 21:57:47,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 3397 transitions, 58265 flow. Second operand has 53 states, 53 states have (on average 57.943396226415096) internal successors, (3071), 53 states have internal predecessors, (3071), 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) [2022-07-22 21:57:47,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:47,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-07-22 21:57:47,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand