./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.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-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:55:39,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:55:39,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:55:40,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:55:40,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:55:40,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:55:40,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:55:40,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:55:40,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:55:40,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:55:40,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:55:40,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:55:40,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:55:40,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:55:40,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:55:40,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:55:40,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:55:40,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:55:40,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:55:40,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:55:40,021 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:55:40,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:55:40,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:55:40,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:55:40,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:55:40,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:55:40,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:55:40,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:55:40,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:55:40,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:55:40,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:55:40,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:55:40,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:55:40,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:55:40,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:55:40,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:55:40,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:55:40,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:55:40,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:55:40,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:55:40,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:55:40,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:55:40,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:55:40,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:55:40,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:55:40,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:55:40,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:55:40,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:55:40,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:55:40,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:55:40,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:55:40,052 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:55:40,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:55:40,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:55:40,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:55:40,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:55:40,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:55:40,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:55:40,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:55:40,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:55:40,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:55:40,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:55:40,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:40,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:55:40,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:55:40,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:55:40,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:55:40,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:55:40,056 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:55:40,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:55:40,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:55:40,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-07-22 21:55:40,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:55:40,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:55:40,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:55:40,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:55:40,237 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:55:40,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-22 21:55:40,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244551a5/f0b6e85739eb4c2db8d29c1fc5aa4832/FLAG724a45f18 [2022-07-22 21:55:40,675 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:55:40,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-07-22 21:55:40,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244551a5/f0b6e85739eb4c2db8d29c1fc5aa4832/FLAG724a45f18 [2022-07-22 21:55:40,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c244551a5/f0b6e85739eb4c2db8d29c1fc5aa4832 [2022-07-22 21:55:40,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:55:40,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:55:40,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:40,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:55:40,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:55:40,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e7f09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40, skipping insertion in model container [2022-07-22 21:55:40,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:55:40,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:55:40,894 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-3.wvr.c[3412,3425] [2022-07-22 21:55:40,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:40,915 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:55:40,931 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-3.wvr.c[3412,3425] [2022-07-22 21:55:40,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:55:40,944 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:55:40,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40 WrapperNode [2022-07-22 21:55:40,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:55:40,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:40,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:55:40,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:55:40,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,977 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-07-22 21:55:40,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:55:40,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:55:40,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:55:40,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:55:40,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:40,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:41,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:55:41,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:55:41,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:55:41,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:55:41,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (1/1) ... [2022-07-22 21:55:41,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:55:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:41,051 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 21:55:41,068 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 21:55:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:55:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:55:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:55:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:55:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:55:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:55:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:55:41,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:55:41,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:55:41,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:55:41,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:55:41,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:55:41,084 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 21:55:41,170 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:55:41,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:55:41,557 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:55:41,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:55:41,669 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 21:55:41,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:41 BoogieIcfgContainer [2022-07-22 21:55:41,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:55:41,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:55:41,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:55:41,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:55:41,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:55:40" (1/3) ... [2022-07-22 21:55:41,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30944051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:41, skipping insertion in model container [2022-07-22 21:55:41,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:55:40" (2/3) ... [2022-07-22 21:55:41,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30944051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:55:41, skipping insertion in model container [2022-07-22 21:55:41,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:55:41" (3/3) ... [2022-07-22 21:55:41,679 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-07-22 21:55:41,683 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:55:41,690 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:55:41,690 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:55:41,690 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:55:41,728 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:55:41,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-07-22 21:55:41,838 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2022-07-22 21:55:41,839 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:55:41,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-07-22 21:55:41,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-07-22 21:55:41,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-07-22 21:55:41,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:55:41,869 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@1fded276, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7523ae81 [2022-07-22 21:55:41,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:55:41,925 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2022-07-22 21:55:41,926 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:55:41,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:41,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:41,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash 322038566, now seen corresponding path program 1 times [2022-07-22 21:55:41,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519806211] [2022-07-22 21:55:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:42,216 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 21:55:42,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:42,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519806211] [2022-07-22 21:55:42,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519806211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:42,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:42,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:55:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130086037] [2022-07-22 21:55:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:42,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:55:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:55:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:55:42,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-07-22 21:55:42,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 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 21:55:42,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:42,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-07-22 21:55:42,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:42,371 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2022-07-22 21:55:42,371 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-07-22 21:55:42,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1040 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-07-22 21:55:42,377 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-07-22 21:55:42,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-07-22 21:55:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:55:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:55:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-07-22 21:55:42,392 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-07-22 21:55:42,392 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-07-22 21:55:42,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-07-22 21:55:42,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:42,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-07-22 21:55:42,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 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 21:55:42,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 21:55:42,409 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 21:55:42,410 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-07-22 21:55:42,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-07-22 21:55:42,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:55:42,417 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-07-22 21:55:42,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-07-22 21:55:42,422 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-07-22 21:55:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-07-22 21:55:42,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 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 21:55:42,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:42,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:42,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:55:42,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1730877595, now seen corresponding path program 1 times [2022-07-22 21:55:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:42,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921070250] [2022-07-22 21:55:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:42,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:42,672 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 21:55:42,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921070250] [2022-07-22 21:55:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921070250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:42,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:42,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:55:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574440274] [2022-07-22 21:55:42,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:42,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:55:42,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:42,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:55:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:55:42,677 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-22 21:55:42,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 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 21:55:42,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:42,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-22 21:55:42,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:42,855 INFO L129 PetriNetUnfolder]: 73/448 cut-off events. [2022-07-22 21:55:42,856 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-22 21:55:42,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1273 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2022-07-22 21:55:42,858 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-07-22 21:55:42,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-07-22 21:55:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:55:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:55:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-22 21:55:42,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-07-22 21:55:42,862 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-22 21:55:42,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-22 21:55:42,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:42,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-22 21:55:42,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 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 21:55:42,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 21:55:42,871 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 21:55:42,871 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-07-22 21:55:42,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-07-22 21:55:42,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:55:42,878 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-07-22 21:55:42,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-07-22 21:55:42,879 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-22 21:55:42,879 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-07-22 21:55:42,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 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 21:55:42,880 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:42,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:42,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:55:42,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:42,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1633722547, now seen corresponding path program 1 times [2022-07-22 21:55:42,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:42,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904467121] [2022-07-22 21:55:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:43,032 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 21:55:43,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904467121] [2022-07-22 21:55:43,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904467121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:43,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:43,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:55:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337036250] [2022-07-22 21:55:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:55:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:55:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:55:43,038 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-22 21:55:43,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 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 21:55:43,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:43,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-22 21:55:43,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:43,155 INFO L129 PetriNetUnfolder]: 92/476 cut-off events. [2022-07-22 21:55:43,156 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-07-22 21:55:43,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1566 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2022-07-22 21:55:43,158 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-07-22 21:55:43,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-07-22 21:55:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:55:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:55:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-07-22 21:55:43,162 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-07-22 21:55:43,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-07-22 21:55:43,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-07-22 21:55:43,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:43,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-07-22 21:55:43,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 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 21:55:43,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:43,167 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:43,168 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-07-22 21:55:43,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-07-22 21:55:43,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:55:43,173 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-07-22 21:55:43,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-07-22 21:55:43,175 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-07-22 21:55:43,175 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-07-22 21:55:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 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 21:55:43,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:43,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:55:43,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1907862800, now seen corresponding path program 1 times [2022-07-22 21:55:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:43,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076534823] [2022-07-22 21:55:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:43,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076534823] [2022-07-22 21:55:43,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076534823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:43,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:43,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:55:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984465456] [2022-07-22 21:55:43,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:55:43,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:55:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:55:43,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-22 21:55:43,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 21:55:43,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:43,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-22 21:55:43,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:43,389 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2022-07-22 21:55:43,389 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2022-07-22 21:55:43,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1113 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2022-07-22 21:55:43,393 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-07-22 21:55:43,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2022-07-22 21:55:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:55:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:55:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-07-22 21:55:43,394 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2022-07-22 21:55:43,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-07-22 21:55:43,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-07-22 21:55:43,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:43,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-07-22 21:55:43,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 21:55:43,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 21:55:43,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 21:55:43,401 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2022-07-22 21:55:43,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2022-07-22 21:55:43,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:43,404 INFO L242 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2022-07-22 21:55:43,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-07-22 21:55:43,408 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2022-07-22 21:55:43,409 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2022-07-22 21:55:43,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 21:55:43,409 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:43,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:43,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:55:43,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2022543448, now seen corresponding path program 2 times [2022-07-22 21:55:43,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:43,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485115019] [2022-07-22 21:55:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:43,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485115019] [2022-07-22 21:55:43,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485115019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:43,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:43,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:55:43,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264154513] [2022-07-22 21:55:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:55:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:55:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:55:43,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-07-22 21:55:43,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 21:55:43,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:43,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-07-22 21:55:43,567 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:43,611 INFO L129 PetriNetUnfolder]: 58/347 cut-off events. [2022-07-22 21:55:43,611 INFO L130 PetriNetUnfolder]: For 89/97 co-relation queries the response was YES. [2022-07-22 21:55:43,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 347 events. 58/347 cut-off events. For 89/97 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 567. Up to 91 conditions per place. [2022-07-22 21:55:43,613 INFO L132 encePairwiseOnDemand]: 205/211 looper letters, 18 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2022-07-22 21:55:43,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 468 flow [2022-07-22 21:55:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:55:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:55:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-07-22 21:55:43,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8846761453396524 [2022-07-22 21:55:43,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-07-22 21:55:43,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-07-22 21:55:43,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:43,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-07-22 21:55:43,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 21:55:43,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 21:55:43,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 21:55:43,618 INFO L186 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 560 transitions. [2022-07-22 21:55:43,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 468 flow [2022-07-22 21:55:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 460 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-07-22 21:55:43,622 INFO L242 Difference]: Finished difference. Result has 188 places, 183 transitions, 429 flow [2022-07-22 21:55:43,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-07-22 21:55:43,624 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-22 21:55:43,624 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 429 flow [2022-07-22 21:55:43,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 21:55:43,624 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:43,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:55:43,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1566264516, now seen corresponding path program 3 times [2022-07-22 21:55:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:43,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485676056] [2022-07-22 21:55:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:55:43,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485676056] [2022-07-22 21:55:43,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485676056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:43,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:43,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:55:43,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778036828] [2022-07-22 21:55:43,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:43,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:55:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:55:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:55:43,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2022-07-22 21:55:43,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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 21:55:43,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:43,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2022-07-22 21:55:43,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:44,128 INFO L129 PetriNetUnfolder]: 426/1115 cut-off events. [2022-07-22 21:55:44,128 INFO L130 PetriNetUnfolder]: For 592/604 co-relation queries the response was YES. [2022-07-22 21:55:44,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1115 events. 426/1115 cut-off events. For 592/604 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6108 event pairs, 103 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2372. Up to 291 conditions per place. [2022-07-22 21:55:44,136 INFO L132 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2022-07-22 21:55:44,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 788 flow [2022-07-22 21:55:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:55:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:55:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2022-07-22 21:55:44,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2022-07-22 21:55:44,140 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2022-07-22 21:55:44,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2022-07-22 21:55:44,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:44,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2022-07-22 21:55:44,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 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 21:55:44,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:44,147 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:44,148 INFO L186 Difference]: Start difference. First operand has 188 places, 183 transitions, 429 flow. Second operand 13 states and 1969 transitions. [2022-07-22 21:55:44,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 788 flow [2022-07-22 21:55:44,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 763 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-22 21:55:44,152 INFO L242 Difference]: Finished difference. Result has 204 places, 189 transitions, 480 flow [2022-07-22 21:55:44,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2022-07-22 21:55:44,153 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2022-07-22 21:55:44,153 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 480 flow [2022-07-22 21:55:44,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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 21:55:44,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:44,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:44,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:55:44,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -438702336, now seen corresponding path program 1 times [2022-07-22 21:55:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078668039] [2022-07-22 21:55:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:44,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:55:44,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078668039] [2022-07-22 21:55:44,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078668039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:55:44,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:55:44,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:55:44,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618121417] [2022-07-22 21:55:44,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:55:44,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:55:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:55:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:55:44,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-07-22 21:55:44,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 480 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 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 21:55:44,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:44,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-07-22 21:55:44,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:44,360 INFO L129 PetriNetUnfolder]: 191/844 cut-off events. [2022-07-22 21:55:44,360 INFO L130 PetriNetUnfolder]: For 355/387 co-relation queries the response was YES. [2022-07-22 21:55:44,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 844 events. 191/844 cut-off events. For 355/387 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4643 event pairs, 41 based on Foata normal form. 20/822 useless extension candidates. Maximal degree in co-relation 1594. Up to 132 conditions per place. [2022-07-22 21:55:44,367 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2022-07-22 21:55:44,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 623 flow [2022-07-22 21:55:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:55:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:55:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2022-07-22 21:55:44,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2022-07-22 21:55:44,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2022-07-22 21:55:44,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2022-07-22 21:55:44,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:44,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2022-07-22 21:55:44,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 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 21:55:44,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 21:55:44,372 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 21:55:44,372 INFO L186 Difference]: Start difference. First operand has 204 places, 189 transitions, 480 flow. Second operand 4 states and 761 transitions. [2022-07-22 21:55:44,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 623 flow [2022-07-22 21:55:44,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 207 transitions, 601 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-07-22 21:55:44,377 INFO L242 Difference]: Finished difference. Result has 198 places, 193 transitions, 511 flow [2022-07-22 21:55:44,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=511, PETRI_PLACES=198, PETRI_TRANSITIONS=193} [2022-07-22 21:55:44,378 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 9 predicate places. [2022-07-22 21:55:44,378 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 193 transitions, 511 flow [2022-07-22 21:55:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 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 21:55:44,379 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:44,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:44,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:55:44,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash 402399663, now seen corresponding path program 1 times [2022-07-22 21:55:44,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:44,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084061135] [2022-07-22 21:55:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:44,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:44,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084061135] [2022-07-22 21:55:44,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084061135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:44,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428878319] [2022-07-22 21:55:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:44,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:44,490 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 21:55:44,491 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 21:55:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:44,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:44,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428878319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:45,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:55:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453093559] [2022-07-22 21:55:45,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:45,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:55:45,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-22 21:55:45,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 193 transitions, 511 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 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 21:55:45,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:45,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-22 21:55:45,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:45,481 INFO L129 PetriNetUnfolder]: 288/1435 cut-off events. [2022-07-22 21:55:45,481 INFO L130 PetriNetUnfolder]: For 1329/1413 co-relation queries the response was YES. [2022-07-22 21:55:45,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3044 conditions, 1435 events. 288/1435 cut-off events. For 1329/1413 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9702 event pairs, 149 based on Foata normal form. 64/1434 useless extension candidates. Maximal degree in co-relation 3031. Up to 323 conditions per place. [2022-07-22 21:55:45,491 INFO L132 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2022-07-22 21:55:45,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 235 transitions, 862 flow [2022-07-22 21:55:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:55:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:55:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2022-07-22 21:55:45,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2022-07-22 21:55:45,496 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2022-07-22 21:55:45,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2022-07-22 21:55:45,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:45,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2022-07-22 21:55:45,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 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 21:55:45,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 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 21:55:45,528 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 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 21:55:45,529 INFO L186 Difference]: Start difference. First operand has 198 places, 193 transitions, 511 flow. Second operand 17 states and 2731 transitions. [2022-07-22 21:55:45,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 235 transitions, 862 flow [2022-07-22 21:55:45,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 235 transitions, 850 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-22 21:55:45,534 INFO L242 Difference]: Finished difference. Result has 220 places, 204 transitions, 618 flow [2022-07-22 21:55:45,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=618, PETRI_PLACES=220, PETRI_TRANSITIONS=204} [2022-07-22 21:55:45,535 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 31 predicate places. [2022-07-22 21:55:45,535 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 204 transitions, 618 flow [2022-07-22 21:55:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 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 21:55:45,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:45,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:45,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:55:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:45,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1732290429, now seen corresponding path program 1 times [2022-07-22 21:55:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064470861] [2022-07-22 21:55:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:55:45,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064470861] [2022-07-22 21:55:45,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064470861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497662656] [2022-07-22 21:55:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:45,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:45,845 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 21:55:45,846 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 21:55:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:55:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:55:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 21:55:46,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497662656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:46,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:46,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:55:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294014585] [2022-07-22 21:55:46,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:55:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:55:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:55:46,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-07-22 21:55:46,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 204 transitions, 618 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 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 21:55:46,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:46,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-07-22 21:55:46,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:46,706 INFO L129 PetriNetUnfolder]: 329/1728 cut-off events. [2022-07-22 21:55:46,706 INFO L130 PetriNetUnfolder]: For 1391/1456 co-relation queries the response was YES. [2022-07-22 21:55:46,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3623 conditions, 1728 events. 329/1728 cut-off events. For 1391/1456 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12448 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3603. Up to 439 conditions per place. [2022-07-22 21:55:46,717 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 68 selfloop transitions, 23 changer transitions 2/235 dead transitions. [2022-07-22 21:55:46,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 235 transitions, 941 flow [2022-07-22 21:55:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 21:55:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-22 21:55:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2096 transitions. [2022-07-22 21:55:46,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7641268683922713 [2022-07-22 21:55:46,722 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2096 transitions. [2022-07-22 21:55:46,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2096 transitions. [2022-07-22 21:55:46,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:46,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2096 transitions. [2022-07-22 21:55:46,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 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 21:55:46,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:46,730 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:55:46,731 INFO L186 Difference]: Start difference. First operand has 220 places, 204 transitions, 618 flow. Second operand 13 states and 2096 transitions. [2022-07-22 21:55:46,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 235 transitions, 941 flow [2022-07-22 21:55:46,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 915 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-22 21:55:46,737 INFO L242 Difference]: Finished difference. Result has 234 places, 212 transitions, 721 flow [2022-07-22 21:55:46,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=721, PETRI_PLACES=234, PETRI_TRANSITIONS=212} [2022-07-22 21:55:46,738 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 45 predicate places. [2022-07-22 21:55:46,738 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 212 transitions, 721 flow [2022-07-22 21:55:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 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 21:55:46,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:46,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:46,773 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 21:55:46,958 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,SelfDestructingSolverStorable8 [2022-07-22 21:55:46,958 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash 567606463, now seen corresponding path program 2 times [2022-07-22 21:55:46,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:46,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053158419] [2022-07-22 21:55:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:46,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:47,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053158419] [2022-07-22 21:55:47,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053158419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:47,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071036706] [2022-07-22 21:55:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:55:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:47,572 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 21:55:47,573 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 21:55:47,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:55:47,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 21:55:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:48,404 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:55:48,404 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 21:55:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:48,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:48,564 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:55:48,565 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 21:55:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071036706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:49,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:49,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-07-22 21:55:49,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003604789] [2022-07-22 21:55:49,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:49,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 21:55:49,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 21:55:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 21:55:49,576 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-22 21:55:49,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 212 transitions, 721 flow. Second operand has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 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 21:55:49,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:49,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-22 21:55:49,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:55:55,164 INFO L129 PetriNetUnfolder]: 8052/21529 cut-off events. [2022-07-22 21:55:55,164 INFO L130 PetriNetUnfolder]: For 21806/22617 co-relation queries the response was YES. [2022-07-22 21:55:55,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49595 conditions, 21529 events. 8052/21529 cut-off events. For 21806/22617 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 236431 event pairs, 1892 based on Foata normal form. 103/20732 useless extension candidates. Maximal degree in co-relation 49569. Up to 3824 conditions per place. [2022-07-22 21:55:55,378 INFO L132 encePairwiseOnDemand]: 172/211 looper letters, 383 selfloop transitions, 195 changer transitions 7/679 dead transitions. [2022-07-22 21:55:55,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 679 transitions, 3911 flow [2022-07-22 21:55:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 21:55:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-22 21:55:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7027 transitions. [2022-07-22 21:55:55,391 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.520364336492891 [2022-07-22 21:55:55,391 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7027 transitions. [2022-07-22 21:55:55,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7027 transitions. [2022-07-22 21:55:55,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:55:55,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7027 transitions. [2022-07-22 21:55:55,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 109.796875) internal successors, (7027), 64 states have internal predecessors, (7027), 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 21:55:55,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 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 21:55:55,499 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 211.0) internal successors, (13715), 65 states have internal predecessors, (13715), 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 21:55:55,499 INFO L186 Difference]: Start difference. First operand has 234 places, 212 transitions, 721 flow. Second operand 64 states and 7027 transitions. [2022-07-22 21:55:55,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 679 transitions, 3911 flow [2022-07-22 21:55:55,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 679 transitions, 3862 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-07-22 21:55:55,525 INFO L242 Difference]: Finished difference. Result has 317 places, 417 transitions, 2441 flow [2022-07-22 21:55:55,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2441, PETRI_PLACES=317, PETRI_TRANSITIONS=417} [2022-07-22 21:55:55,526 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 128 predicate places. [2022-07-22 21:55:55,527 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 417 transitions, 2441 flow [2022-07-22 21:55:55,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 107.35555555555555) internal successors, (4831), 45 states have internal predecessors, (4831), 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 21:55:55,528 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:55:55,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:55,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:55:55,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:55,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:55:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:55:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -832418055, now seen corresponding path program 3 times [2022-07-22 21:55:55,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:55:55,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436549153] [2022-07-22 21:55:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:55:55,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:55:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:55:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:55:56,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:55:56,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436549153] [2022-07-22 21:55:56,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436549153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:55:56,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117500873] [2022-07-22 21:55:56,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:55:56,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:55:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:55:56,428 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 21:55:56,440 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 21:55:56,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:55:56,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:55:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:55:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:55:56,889 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:55:56,889 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 21:55:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:55:56,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:55:57,014 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-22 21:55:57,014 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 21:55:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:55:57,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117500873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:55:57,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:55:57,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 5, 5] total 25 [2022-07-22 21:55:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920260539] [2022-07-22 21:55:57,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:55:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 21:55:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:55:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 21:55:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-07-22 21:55:57,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 211 [2022-07-22 21:55:57,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 417 transitions, 2441 flow. Second operand has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 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 21:55:57,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:55:57,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 211 [2022-07-22 21:55:57,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:03,030 INFO L129 PetriNetUnfolder]: 9108/24396 cut-off events. [2022-07-22 21:56:03,030 INFO L130 PetriNetUnfolder]: For 198224/202550 co-relation queries the response was YES. [2022-07-22 21:56:03,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105175 conditions, 24396 events. 9108/24396 cut-off events. For 198224/202550 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 276015 event pairs, 3263 based on Foata normal form. 421/24370 useless extension candidates. Maximal degree in co-relation 105124. Up to 10411 conditions per place. [2022-07-22 21:56:03,297 INFO L132 encePairwiseOnDemand]: 180/211 looper letters, 353 selfloop transitions, 102 changer transitions 0/549 dead transitions. [2022-07-22 21:56:03,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 549 transitions, 4423 flow [2022-07-22 21:56:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 21:56:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-22 21:56:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4191 transitions. [2022-07-22 21:56:03,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5092963908129785 [2022-07-22 21:56:03,302 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4191 transitions. [2022-07-22 21:56:03,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4191 transitions. [2022-07-22 21:56:03,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:03,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4191 transitions. [2022-07-22 21:56:03,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 107.46153846153847) internal successors, (4191), 39 states have internal predecessors, (4191), 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 21:56:03,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 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 21:56:03,314 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 211.0) internal successors, (8440), 40 states have internal predecessors, (8440), 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 21:56:03,314 INFO L186 Difference]: Start difference. First operand has 317 places, 417 transitions, 2441 flow. Second operand 39 states and 4191 transitions. [2022-07-22 21:56:03,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 549 transitions, 4423 flow [2022-07-22 21:56:03,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 549 transitions, 4188 flow, removed 96 selfloop flow, removed 16 redundant places. [2022-07-22 21:56:03,565 INFO L242 Difference]: Finished difference. Result has 344 places, 451 transitions, 2864 flow [2022-07-22 21:56:03,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2864, PETRI_PLACES=344, PETRI_TRANSITIONS=451} [2022-07-22 21:56:03,565 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 155 predicate places. [2022-07-22 21:56:03,566 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 451 transitions, 2864 flow [2022-07-22 21:56:03,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.72) internal successors, (2718), 25 states have internal predecessors, (2718), 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 21:56:03,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:03,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:03,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:56:03,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:03,784 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:03,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1280105239, now seen corresponding path program 4 times [2022-07-22 21:56:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:03,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881862930] [2022-07-22 21:56:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:04,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881862930] [2022-07-22 21:56:04,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881862930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110783350] [2022-07-22 21:56:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:56:04,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:04,333 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 21:56:04,335 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 21:56:04,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:56:04,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 21:56:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:04,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:56:04,592 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:56:04,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-07-22 21:56:05,239 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 21:56:05,313 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 21:56:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:05,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:56:05,491 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:56:05,492 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 21:56:05,495 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 21:56:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:06,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110783350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:56:06,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:56:06,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-07-22 21:56:06,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734676677] [2022-07-22 21:56:06,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:56:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 21:56:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 21:56:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3138, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 21:56:06,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 211 [2022-07-22 21:56:06,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 451 transitions, 2864 flow. Second operand has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 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 21:56:06,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:06,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 211 [2022-07-22 21:56:06,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:56:26,159 INFO L129 PetriNetUnfolder]: 27396/71392 cut-off events. [2022-07-22 21:56:26,175 INFO L130 PetriNetUnfolder]: For 688215/701584 co-relation queries the response was YES. [2022-07-22 21:56:27,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 310242 conditions, 71392 events. 27396/71392 cut-off events. For 688215/701584 co-relation queries the response was YES. Maximal size of possible extension queue 2678. Compared 934140 event pairs, 3167 based on Foata normal form. 2570/72725 useless extension candidates. Maximal degree in co-relation 310186. Up to 12248 conditions per place. [2022-07-22 21:56:27,448 INFO L132 encePairwiseOnDemand]: 172/211 looper letters, 971 selfloop transitions, 434 changer transitions 24/1536 dead transitions. [2022-07-22 21:56:27,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1536 transitions, 15608 flow [2022-07-22 21:56:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-22 21:56:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-22 21:56:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 11117 transitions. [2022-07-22 21:56:27,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5789802614447164 [2022-07-22 21:56:27,467 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 11117 transitions. [2022-07-22 21:56:27,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 11117 transitions. [2022-07-22 21:56:27,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:56:27,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 11117 transitions. [2022-07-22 21:56:27,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 122.16483516483517) internal successors, (11117), 91 states have internal predecessors, (11117), 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 21:56:27,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 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 21:56:27,511 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 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 21:56:27,511 INFO L186 Difference]: Start difference. First operand has 344 places, 451 transitions, 2864 flow. Second operand 91 states and 11117 transitions. [2022-07-22 21:56:27,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1536 transitions, 15608 flow [2022-07-22 21:56:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1536 transitions, 15401 flow, removed 64 selfloop flow, removed 32 redundant places. [2022-07-22 21:56:28,425 INFO L242 Difference]: Finished difference. Result has 430 places, 836 transitions, 7012 flow [2022-07-22 21:56:28,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=7012, PETRI_PLACES=430, PETRI_TRANSITIONS=836} [2022-07-22 21:56:28,427 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 241 predicate places. [2022-07-22 21:56:28,427 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 836 transitions, 7012 flow [2022-07-22 21:56:28,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 120.30508474576271) internal successors, (7098), 59 states have internal predecessors, (7098), 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 21:56:28,444 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:56:28,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:28,464 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 21:56:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:56:28,645 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:56:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:56:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2072074159, now seen corresponding path program 5 times [2022-07-22 21:56:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:56:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537026244] [2022-07-22 21:56:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:56:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:56:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:56:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:56:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:56:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537026244] [2022-07-22 21:56:29,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537026244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:56:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834100251] [2022-07-22 21:56:29,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:56:29,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:56:29,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:56:29,483 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 21:56:29,484 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 21:56:29,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:56:29,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:56:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 21:56:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:56:29,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:56:29,629 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 21:56:29,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 21:56:29,774 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-22 21:56:29,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-07-22 21:56:30,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 21:56:30,205 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 21:56:30,276 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 21:56:30,276 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 21:56:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 21:56:30,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:56:30,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834100251] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:56:30,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:56:30,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [30] total 42 [2022-07-22 21:56:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895077134] [2022-07-22 21:56:30,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:56:30,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:56:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:56:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:56:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1577, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 21:56:30,299 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 211 [2022-07-22 21:56:30,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 836 transitions, 7012 flow. Second operand has 14 states, 14 states have (on average 142.71428571428572) internal successors, (1998), 14 states have internal predecessors, (1998), 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 21:56:30,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:56:30,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 211 [2022-07-22 21:56:30,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand