./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-threaded-sum-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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:40:08,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:40:08,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:40:08,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:40:08,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:40:08,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:40:08,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:40:08,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:40:08,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:40:08,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:40:08,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:40:08,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:40:08,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:40:08,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:40:08,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:40:08,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:40:08,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:40:08,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:40:08,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:40:08,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:40:08,503 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:40:08,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:40:08,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:40:08,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:40:08,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:40:08,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:40:08,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:40:08,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:40:08,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:40:08,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:40:08,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:40:08,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:40:08,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:40:08,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:40:08,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:40:08,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:40:08,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:40:08,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:40:08,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:40:08,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:40:08,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:40:08,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:40:08,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:40:08,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:40:08,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:40:08,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:40:08,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:40:08,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:40:08,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:40:08,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:40:08,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:40:08,541 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:40:08,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:40:08,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:40:08,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:40:08,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:40:08,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:40:08,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:40:08,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:40:08,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:40:08,544 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:40:08,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:40:08,544 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:40:08,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:40:08,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:40:08,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:40:08,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:40:08,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:08,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:40:08,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:40:08,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:40:08,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:40:08,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:40:08,547 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:40:08,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:40:08,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:40:08,548 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-07-12 10:40:08,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:40:08,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:40:08,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:40:08,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:40:08,818 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:40:08,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-12 10:40:08,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ffdb4fdd/148b25070fbd418ab7661f29b81d18dc/FLAG85348963f [2022-07-12 10:40:09,292 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:40:09,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-12 10:40:09,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ffdb4fdd/148b25070fbd418ab7661f29b81d18dc/FLAG85348963f [2022-07-12 10:40:09,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ffdb4fdd/148b25070fbd418ab7661f29b81d18dc [2022-07-12 10:40:09,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:40:09,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:40:09,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:09,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:40:09,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:40:09,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:09,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffba902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09, skipping insertion in model container [2022-07-12 10:40:09,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:09,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:40:09,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:40:09,910 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-threaded-sum-3.wvr.c[2957,2970] [2022-07-12 10:40:09,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:09,920 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:40:09,938 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-threaded-sum-3.wvr.c[2957,2970] [2022-07-12 10:40:09,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:09,951 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:40:09,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09 WrapperNode [2022-07-12 10:40:09,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:09,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:09,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:40:09,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:40:09,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:09,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:09,989 INFO L137 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-12 10:40:09,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:09,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:40:09,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:40:09,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:40:09,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:09,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:40:10,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:40:10,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:40:10,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:40:10,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (1/1) ... [2022-07-12 10:40:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:10,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:40:10,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:40:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:40:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:40:10,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:40:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:40:10,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:40:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:40:10,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:40:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:40:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:40:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:40:10,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:40:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:40:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:40:10,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:40:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:40:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:40:10,121 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:40:10,241 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:40:10,243 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:40:10,482 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:40:10,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:40:10,540 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:40:10,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:10 BoogieIcfgContainer [2022-07-12 10:40:10,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:40:10,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:40:10,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:40:10,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:40:10,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:40:09" (1/3) ... [2022-07-12 10:40:10,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a6f678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:10, skipping insertion in model container [2022-07-12 10:40:10,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:09" (2/3) ... [2022-07-12 10:40:10,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a6f678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:10, skipping insertion in model container [2022-07-12 10:40:10,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:10" (3/3) ... [2022-07-12 10:40:10,550 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-07-12 10:40:10,555 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:40:10,562 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:40:10,563 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:40:10,563 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:40:10,634 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:40:10,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-07-12 10:40:10,757 INFO L129 PetriNetUnfolder]: 8/112 cut-off events. [2022-07-12 10:40:10,757 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:40:10,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-07-12 10:40:10,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-07-12 10:40:10,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-07-12 10:40:10,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:40:10,788 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@cf1d4c3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d19d214 [2022-07-12 10:40:10,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:40:10,823 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2022-07-12 10:40:10,823 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:40:10,824 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:10,824 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] [2022-07-12 10:40:10,825 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)] === [2022-07-12 10:40:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2022-07-12 10:40:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:10,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736376783] [2022-07-12 10:40:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:11,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736376783] [2022-07-12 10:40:11,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736376783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:11,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:40:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982975350] [2022-07-12 10:40:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:11,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:40:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:40:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:40:11,673 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-07-12 10:40:11,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:11,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:11,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-07-12 10:40:11,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:12,257 INFO L129 PetriNetUnfolder]: 349/957 cut-off events. [2022-07-12 10:40:12,258 INFO L130 PetriNetUnfolder]: For 110/121 co-relation queries the response was YES. [2022-07-12 10:40:12,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 957 events. 349/957 cut-off events. For 110/121 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5712 event pairs, 108 based on Foata normal form. 120/948 useless extension candidates. Maximal degree in co-relation 1341. Up to 296 conditions per place. [2022-07-12 10:40:12,270 INFO L132 encePairwiseOnDemand]: 99/115 looper letters, 71 selfloop transitions, 16 changer transitions 3/146 dead transitions. [2022-07-12 10:40:12,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 523 flow [2022-07-12 10:40:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:40:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:40:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 801 transitions. [2022-07-12 10:40:12,288 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6965217391304348 [2022-07-12 10:40:12,289 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 801 transitions. [2022-07-12 10:40:12,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 801 transitions. [2022-07-12 10:40:12,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:12,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 801 transitions. [2022-07-12 10:40:12,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.1) internal successors, (801), 10 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:12,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:12,310 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:12,311 INFO L186 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 10 states and 801 transitions. [2022-07-12 10:40:12,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 523 flow [2022-07-12 10:40:12,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 146 transitions, 489 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:40:12,326 INFO L242 Difference]: Finished difference. Result has 110 places, 108 transitions, 291 flow [2022-07-12 10:40:12,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2022-07-12 10:40:12,332 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-12 10:40:12,333 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 291 flow [2022-07-12 10:40:12,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:12,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:12,334 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] [2022-07-12 10:40:12,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:40:12,334 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)] === [2022-07-12 10:40:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1633833426, now seen corresponding path program 1 times [2022-07-12 10:40:12,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351718981] [2022-07-12 10:40:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:12,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:40:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:12,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351718981] [2022-07-12 10:40:12,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351718981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:12,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:12,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:40:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13713149] [2022-07-12 10:40:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:12,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:40:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:12,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:40:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:40:12,764 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-12 10:40:12,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:12,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:12,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-12 10:40:12,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:13,073 INFO L129 PetriNetUnfolder]: 441/1080 cut-off events. [2022-07-12 10:40:13,073 INFO L130 PetriNetUnfolder]: For 429/459 co-relation queries the response was YES. [2022-07-12 10:40:13,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2256 conditions, 1080 events. 441/1080 cut-off events. For 429/459 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6665 event pairs, 97 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 1433. Up to 315 conditions per place. [2022-07-12 10:40:13,084 INFO L132 encePairwiseOnDemand]: 108/115 looper letters, 71 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2022-07-12 10:40:13,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 136 transitions, 560 flow [2022-07-12 10:40:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:40:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:40:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2022-07-12 10:40:13,099 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2022-07-12 10:40:13,099 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2022-07-12 10:40:13,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2022-07-12 10:40:13,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:13,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2022-07-12 10:40:13,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,103 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,103 INFO L186 Difference]: Start difference. First operand has 110 places, 108 transitions, 291 flow. Second operand 7 states and 552 transitions. [2022-07-12 10:40:13,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 136 transitions, 560 flow [2022-07-12 10:40:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 136 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:40:13,110 INFO L242 Difference]: Finished difference. Result has 113 places, 111 transitions, 318 flow [2022-07-12 10:40:13,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2022-07-12 10:40:13,111 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 10 predicate places. [2022-07-12 10:40:13,111 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 318 flow [2022-07-12 10:40:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,112 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:13,112 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] [2022-07-12 10:40:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:40:13,113 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)] === [2022-07-12 10:40:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1892032191, now seen corresponding path program 1 times [2022-07-12 10:40:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980220142] [2022-07-12 10:40:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980220142] [2022-07-12 10:40:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980220142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:13,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:13,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:40:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931838932] [2022-07-12 10:40:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:40:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:40:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:40:13,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2022-07-12 10:40:13,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:13,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2022-07-12 10:40:13,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:13,604 INFO L129 PetriNetUnfolder]: 895/1759 cut-off events. [2022-07-12 10:40:13,605 INFO L130 PetriNetUnfolder]: For 864/868 co-relation queries the response was YES. [2022-07-12 10:40:13,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 1759 events. 895/1759 cut-off events. For 864/868 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10354 event pairs, 56 based on Foata normal form. 4/1660 useless extension candidates. Maximal degree in co-relation 3118. Up to 603 conditions per place. [2022-07-12 10:40:13,619 INFO L132 encePairwiseOnDemand]: 107/115 looper letters, 83 selfloop transitions, 16 changer transitions 0/171 dead transitions. [2022-07-12 10:40:13,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 722 flow [2022-07-12 10:40:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:40:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:40:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2022-07-12 10:40:13,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8347826086956521 [2022-07-12 10:40:13,622 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2022-07-12 10:40:13,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2022-07-12 10:40:13,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:13,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2022-07-12 10:40:13,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,627 INFO L186 Difference]: Start difference. First operand has 113 places, 111 transitions, 318 flow. Second operand 8 states and 768 transitions. [2022-07-12 10:40:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 722 flow [2022-07-12 10:40:13,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 716 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:40:13,637 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 441 flow [2022-07-12 10:40:13,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-12 10:40:13,638 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 19 predicate places. [2022-07-12 10:40:13,638 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 441 flow [2022-07-12 10:40:13,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,639 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:13,639 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] [2022-07-12 10:40:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:40:13,639 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)] === [2022-07-12 10:40:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash -344235847, now seen corresponding path program 2 times [2022-07-12 10:40:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:13,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947579167] [2022-07-12 10:40:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:13,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:13,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947579167] [2022-07-12 10:40:13,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947579167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:13,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535304064] [2022-07-12 10:40:13,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:40:13,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:13,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:13,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:40:13,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:40:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:40:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:40:14,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:40:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535304064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:14,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:40:14,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-07-12 10:40:14,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230010789] [2022-07-12 10:40:14,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:14,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:40:14,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:40:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:40:14,234 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 115 [2022-07-12 10:40:14,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:14,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 115 [2022-07-12 10:40:14,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:14,505 INFO L129 PetriNetUnfolder]: 385/1052 cut-off events. [2022-07-12 10:40:14,506 INFO L130 PetriNetUnfolder]: For 1019/1041 co-relation queries the response was YES. [2022-07-12 10:40:14,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 1052 events. 385/1052 cut-off events. For 1019/1041 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6425 event pairs, 69 based on Foata normal form. 22/1029 useless extension candidates. Maximal degree in co-relation 2363. Up to 374 conditions per place. [2022-07-12 10:40:14,516 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 65 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2022-07-12 10:40:14,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 772 flow [2022-07-12 10:40:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:40:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:40:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 697 transitions. [2022-07-12 10:40:14,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7576086956521739 [2022-07-12 10:40:14,524 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 697 transitions. [2022-07-12 10:40:14,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 697 transitions. [2022-07-12 10:40:14,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:14,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 697 transitions. [2022-07-12 10:40:14,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.125) internal successors, (697), 8 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,528 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,528 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 441 flow. Second operand 8 states and 697 transitions. [2022-07-12 10:40:14,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 772 flow [2022-07-12 10:40:14,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 154 transitions, 764 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-12 10:40:14,537 INFO L242 Difference]: Finished difference. Result has 131 places, 130 transitions, 555 flow [2022-07-12 10:40:14,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=555, PETRI_PLACES=131, PETRI_TRANSITIONS=130} [2022-07-12 10:40:14,539 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 28 predicate places. [2022-07-12 10:40:14,539 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 130 transitions, 555 flow [2022-07-12 10:40:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:14,540 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] [2022-07-12 10:40:14,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:40:14,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:14,771 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)] === [2022-07-12 10:40:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1337366013, now seen corresponding path program 1 times [2022-07-12 10:40:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293392106] [2022-07-12 10:40:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293392106] [2022-07-12 10:40:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293392106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032382107] [2022-07-12 10:40:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:14,999 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) [2022-07-12 10:40:15,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:40:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:40:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:15,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:40:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032382107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:15,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:40:15,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 13 [2022-07-12 10:40:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749649870] [2022-07-12 10:40:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:40:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:40:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:40:15,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-12 10:40:15,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 130 transitions, 555 flow. Second operand has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:15,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:15,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-12 10:40:15,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:16,027 INFO L129 PetriNetUnfolder]: 1720/3441 cut-off events. [2022-07-12 10:40:16,027 INFO L130 PetriNetUnfolder]: For 6518/6520 co-relation queries the response was YES. [2022-07-12 10:40:16,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10621 conditions, 3441 events. 1720/3441 cut-off events. For 6518/6520 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23349 event pairs, 530 based on Foata normal form. 135/3539 useless extension candidates. Maximal degree in co-relation 9692. Up to 1319 conditions per place. [2022-07-12 10:40:16,064 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 129 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2022-07-12 10:40:16,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 211 transitions, 1384 flow [2022-07-12 10:40:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:40:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:40:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 914 transitions. [2022-07-12 10:40:16,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7225296442687748 [2022-07-12 10:40:16,067 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 914 transitions. [2022-07-12 10:40:16,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 914 transitions. [2022-07-12 10:40:16,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:16,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 914 transitions. [2022-07-12 10:40:16,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 83.0909090909091) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,073 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,073 INFO L186 Difference]: Start difference. First operand has 131 places, 130 transitions, 555 flow. Second operand 11 states and 914 transitions. [2022-07-12 10:40:16,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 211 transitions, 1384 flow [2022-07-12 10:40:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 1324 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-07-12 10:40:16,093 INFO L242 Difference]: Finished difference. Result has 143 places, 138 transitions, 695 flow [2022-07-12 10:40:16,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=695, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2022-07-12 10:40:16,094 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 40 predicate places. [2022-07-12 10:40:16,094 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 695 flow [2022-07-12 10:40:16,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:16,095 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] [2022-07-12 10:40:16,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:16,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:16,318 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)] === [2022-07-12 10:40:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1203340301, now seen corresponding path program 2 times [2022-07-12 10:40:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622446438] [2022-07-12 10:40:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622446438] [2022-07-12 10:40:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622446438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086371274] [2022-07-12 10:40:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:40:16,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:16,499 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) [2022-07-12 10:40:16,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:40:16,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:40:16,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 10:40:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:16,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:16,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086371274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:16,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:16,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5] total 16 [2022-07-12 10:40:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763910897] [2022-07-12 10:40:16,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:40:16,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:40:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:40:16,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 115 [2022-07-12 10:40:16,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 695 flow. Second operand has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:16,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 115 [2022-07-12 10:40:16,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:18,685 INFO L129 PetriNetUnfolder]: 3623/6128 cut-off events. [2022-07-12 10:40:18,686 INFO L130 PetriNetUnfolder]: For 16364/16364 co-relation queries the response was YES. [2022-07-12 10:40:18,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6128 events. 3623/6128 cut-off events. For 16364/16364 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37972 event pairs, 198 based on Foata normal form. 159/6252 useless extension candidates. Maximal degree in co-relation 16706. Up to 1034 conditions per place. [2022-07-12 10:40:18,761 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 249 selfloop transitions, 113 changer transitions 0/422 dead transitions. [2022-07-12 10:40:18,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 422 transitions, 3332 flow [2022-07-12 10:40:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 10:40:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-12 10:40:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2357 transitions. [2022-07-12 10:40:18,768 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7067466266866567 [2022-07-12 10:40:18,768 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2357 transitions. [2022-07-12 10:40:18,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2357 transitions. [2022-07-12 10:40:18,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:18,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2357 transitions. [2022-07-12 10:40:18,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 81.27586206896552) internal successors, (2357), 29 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,782 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,782 INFO L186 Difference]: Start difference. First operand has 143 places, 138 transitions, 695 flow. Second operand 29 states and 2357 transitions. [2022-07-12 10:40:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 422 transitions, 3332 flow [2022-07-12 10:40:18,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 422 transitions, 3222 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-12 10:40:18,829 INFO L242 Difference]: Finished difference. Result has 179 places, 228 transitions, 1894 flow [2022-07-12 10:40:18,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1894, PETRI_PLACES=179, PETRI_TRANSITIONS=228} [2022-07-12 10:40:18,832 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-07-12 10:40:18,832 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 228 transitions, 1894 flow [2022-07-12 10:40:18,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,833 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:18,833 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] [2022-07-12 10:40:18,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:40:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:19,052 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)] === [2022-07-12 10:40:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1270315933, now seen corresponding path program 3 times [2022-07-12 10:40:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050092712] [2022-07-12 10:40:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050092712] [2022-07-12 10:40:21,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050092712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105975085] [2022-07-12 10:40:21,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:40:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:21,204 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) [2022-07-12 10:40:21,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:40:21,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:40:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:40:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:22,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:57,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105975085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:57,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:57,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-12 10:40:57,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702533566] [2022-07-12 10:40:57,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:57,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 10:40:57,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 10:40:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1229, Unknown=1, NotChecked=0, Total=1482 [2022-07-12 10:40:57,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 115 [2022-07-12 10:40:57,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 228 transitions, 1894 flow. Second operand has 39 states, 39 states have (on average 68.38461538461539) internal successors, (2667), 39 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:57,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:57,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 115 [2022-07-12 10:40:57,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:18,566 WARN L233 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 223 DAG size of output: 214 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:41:46,634 WARN L233 SmtUtils]: Spent 25.55s on a formula simplification. DAG size of input: 231 DAG size of output: 223 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:41:49,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:42:20,310 WARN L233 SmtUtils]: Spent 19.65s on a formula simplification. DAG size of input: 239 DAG size of output: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:42:44,556 WARN L233 SmtUtils]: Spent 18.12s on a formula simplification. DAG size of input: 247 DAG size of output: 235 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:42:47,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:43:12,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 10:43:42,035 WARN L233 SmtUtils]: Spent 13.07s on a formula simplification. DAG size of input: 216 DAG size of output: 208 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)