./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-commit-1.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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:32:19,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:32:19,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:32:19,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:32:19,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:32:19,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:32:19,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:32:19,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:32:19,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:32:19,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:32:19,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:32:19,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:32:19,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:32:19,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:32:19,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:32:19,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:32:19,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:32:19,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:32:19,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:32:19,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:32:19,603 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:32:19,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:32:19,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:32:19,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:32:19,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:32:19,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:32:19,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:32:19,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:32:19,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:32:19,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:32:19,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:32:19,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:32:19,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:32:19,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:32:19,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:32:19,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:32:19,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:32:19,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:32:19,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:32:19,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:32:19,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:32:19,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:32:19,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:32:19,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:32:19,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:32:19,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:32:19,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:32:19,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:32:19,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:32:19,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:32:19,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:32:19,652 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:32:19,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:32:19,653 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:32:19,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:32:19,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:32:19,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:32:19,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:32:19,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:32:19,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:32:19,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:32:19,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:32:19,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:32:19,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:32:19,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:32:19,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:32:19,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:32:19,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:32:19,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:32:19,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:32:19,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:32:19,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:32:19,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:32:19,661 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:32:19,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:32:19,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:32:19,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-07-19 21:32:19,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:32:19,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:32:19,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:32:19,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:32:19,952 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:32:19,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-19 21:32:20,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680a0d3d/870d5f02cfe3445fb4866e395b458d82/FLAG97a6f5b91 [2022-07-19 21:32:20,465 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:32:20,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-07-19 21:32:20,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680a0d3d/870d5f02cfe3445fb4866e395b458d82/FLAG97a6f5b91 [2022-07-19 21:32:20,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b680a0d3d/870d5f02cfe3445fb4866e395b458d82 [2022-07-19 21:32:20,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:32:20,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:32:20,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:32:20,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:32:20,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:32:20,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ffcff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20, skipping insertion in model container [2022-07-19 21:32:20,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:32:20,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:32:20,737 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-commit-1.wvr.c[4604,4617] [2022-07-19 21:32:20,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:32:20,762 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:32:20,800 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-commit-1.wvr.c[4604,4617] [2022-07-19 21:32:20,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:32:20,828 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:32:20,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20 WrapperNode [2022-07-19 21:32:20,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:32:20,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:32:20,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:32:20,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:32:20,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,893 INFO L137 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 333 [2022-07-19 21:32:20,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:32:20,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:32:20,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:32:20,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:32:20,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:32:20,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:32:20,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:32:20,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:32:20,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (1/1) ... [2022-07-19 21:32:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:32:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:32:20,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:32:21,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:32:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:32:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:32:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:32:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:32:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:32:21,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:32:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:32:21,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:32:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:32:21,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:32:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:32:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:32:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:32:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:32:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:32:21,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:32:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:32:21,050 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:32:21,196 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:32:21,197 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:32:21,615 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:32:21,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:32:21,789 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:32:21,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:32:21 BoogieIcfgContainer [2022-07-19 21:32:21,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:32:21,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:32:21,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:32:21,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:32:21,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:32:20" (1/3) ... [2022-07-19 21:32:21,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c356c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:32:21, skipping insertion in model container [2022-07-19 21:32:21,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:32:20" (2/3) ... [2022-07-19 21:32:21,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c356c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:32:21, skipping insertion in model container [2022-07-19 21:32:21,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:32:21" (3/3) ... [2022-07-19 21:32:21,799 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-07-19 21:32:21,803 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:32:21,811 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:32:21,811 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:32:21,811 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:32:21,881 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:32:21,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 254 transitions, 532 flow [2022-07-19 21:32:21,999 INFO L129 PetriNetUnfolder]: 19/251 cut-off events. [2022-07-19 21:32:21,999 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:32:22,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 19/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2022-07-19 21:32:22,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 254 transitions, 532 flow [2022-07-19 21:32:22,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 240 transitions, 498 flow [2022-07-19 21:32:22,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:32:22,022 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@15a932a5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@513ed3ff [2022-07-19 21:32:22,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:32:22,059 INFO L129 PetriNetUnfolder]: 19/239 cut-off events. [2022-07-19 21:32:22,059 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:32:22,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:22,060 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:22,061 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)] === [2022-07-19 21:32:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033997, now seen corresponding path program 1 times [2022-07-19 21:32:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030056344] [2022-07-19 21:32:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030056344] [2022-07-19 21:32:22,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030056344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:22,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:22,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:32:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738942607] [2022-07-19 21:32:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:22,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:32:22,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:32:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:32:22,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 254 [2022-07-19 21:32:22,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 240 transitions, 498 flow. Second operand has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:22,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 254 [2022-07-19 21:32:22,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:22,465 INFO L129 PetriNetUnfolder]: 66/311 cut-off events. [2022-07-19 21:32:22,466 INFO L130 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-07-19 21:32:22,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 311 events. 66/311 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 446 event pairs, 31 based on Foata normal form. 42/332 useless extension candidates. Maximal degree in co-relation 251. Up to 99 conditions per place. [2022-07-19 21:32:22,471 INFO L132 encePairwiseOnDemand]: 241/254 looper letters, 14 selfloop transitions, 0 changer transitions 7/227 dead transitions. [2022-07-19 21:32:22,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 227 transitions, 500 flow [2022-07-19 21:32:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:32:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:32:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 479 transitions. [2022-07-19 21:32:22,489 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9429133858267716 [2022-07-19 21:32:22,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 479 transitions. [2022-07-19 21:32:22,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 479 transitions. [2022-07-19 21:32:22,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:22,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 479 transitions. [2022-07-19 21:32:22,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,507 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,509 INFO L186 Difference]: Start difference. First operand has 231 places, 240 transitions, 498 flow. Second operand 2 states and 479 transitions. [2022-07-19 21:32:22,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 227 transitions, 500 flow [2022-07-19 21:32:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 227 transitions, 488 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:32:22,517 INFO L242 Difference]: Finished difference. Result has 226 places, 220 transitions, 446 flow [2022-07-19 21:32:22,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=226, PETRI_TRANSITIONS=220} [2022-07-19 21:32:22,522 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-19 21:32:22,522 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 220 transitions, 446 flow [2022-07-19 21:32:22,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:22,523 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:32:22,524 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)] === [2022-07-19 21:32:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1182409905, now seen corresponding path program 1 times [2022-07-19 21:32:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041441079] [2022-07-19 21:32:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:22,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:22,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041441079] [2022-07-19 21:32:22,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041441079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:22,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:22,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:32:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976928498] [2022-07-19 21:32:22,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:32:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:32:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:32:22,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 254 [2022-07-19 21:32:22,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 220 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:22,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 254 [2022-07-19 21:32:22,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:22,943 INFO L129 PetriNetUnfolder]: 79/371 cut-off events. [2022-07-19 21:32:22,944 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-19 21:32:22,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 371 events. 79/371 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 8 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 539. Up to 115 conditions per place. [2022-07-19 21:32:22,946 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 48 selfloop transitions, 4 changer transitions 4/232 dead transitions. [2022-07-19 21:32:22,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 232 transitions, 587 flow [2022-07-19 21:32:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:32:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:32:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2022-07-19 21:32:22,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7889763779527559 [2022-07-19 21:32:22,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2022-07-19 21:32:22,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2022-07-19 21:32:22,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:22,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2022-07-19 21:32:22,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,959 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,959 INFO L186 Difference]: Start difference. First operand has 226 places, 220 transitions, 446 flow. Second operand 5 states and 1002 transitions. [2022-07-19 21:32:22,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 232 transitions, 587 flow [2022-07-19 21:32:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 232 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:32:22,969 INFO L242 Difference]: Finished difference. Result has 226 places, 223 transitions, 476 flow [2022-07-19 21:32:22,970 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-07-19 21:32:22,971 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -5 predicate places. [2022-07-19 21:32:22,972 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 476 flow [2022-07-19 21:32:22,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.2) internal successors, (981), 5 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:22,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:22,973 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:22,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:32:22,974 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)] === [2022-07-19 21:32:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash 811659123, now seen corresponding path program 1 times [2022-07-19 21:32:22,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:22,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364977196] [2022-07-19 21:32:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:23,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364977196] [2022-07-19 21:32:23,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364977196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:23,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:23,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:32:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916162834] [2022-07-19 21:32:23,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:32:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:32:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:32:23,161 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-19 21:32:23,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:23,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-19 21:32:23,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:23,438 INFO L129 PetriNetUnfolder]: 83/511 cut-off events. [2022-07-19 21:32:23,438 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-19 21:32:23,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 511 events. 83/511 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1273 event pairs, 36 based on Foata normal form. 13/495 useless extension candidates. Maximal degree in co-relation 794. Up to 145 conditions per place. [2022-07-19 21:32:23,442 INFO L132 encePairwiseOnDemand]: 242/254 looper letters, 51 selfloop transitions, 8 changer transitions 32/259 dead transitions. [2022-07-19 21:32:23,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 259 transitions, 739 flow [2022-07-19 21:32:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:32:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:32:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1783 transitions. [2022-07-19 21:32:23,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7799650043744532 [2022-07-19 21:32:23,448 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1783 transitions. [2022-07-19 21:32:23,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1783 transitions. [2022-07-19 21:32:23,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:23,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1783 transitions. [2022-07-19 21:32:23,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.11111111111111) internal successors, (1783), 9 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,458 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,458 INFO L186 Difference]: Start difference. First operand has 226 places, 223 transitions, 476 flow. Second operand 9 states and 1783 transitions. [2022-07-19 21:32:23,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 259 transitions, 739 flow [2022-07-19 21:32:23,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 259 transitions, 730 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:32:23,464 INFO L242 Difference]: Finished difference. Result has 231 places, 224 transitions, 502 flow [2022-07-19 21:32:23,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=231, PETRI_TRANSITIONS=224} [2022-07-19 21:32:23,467 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 0 predicate places. [2022-07-19 21:32:23,467 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 224 transitions, 502 flow [2022-07-19 21:32:23,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:23,468 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:32:23,469 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)] === [2022-07-19 21:32:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1273864345, now seen corresponding path program 1 times [2022-07-19 21:32:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013511048] [2022-07-19 21:32:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:23,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:32:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013511048] [2022-07-19 21:32:23,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013511048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:23,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:23,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:32:23,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641496176] [2022-07-19 21:32:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:32:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:32:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:32:23,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-19 21:32:23,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 224 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:23,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-19 21:32:23,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:23,778 INFO L129 PetriNetUnfolder]: 84/434 cut-off events. [2022-07-19 21:32:23,778 INFO L130 PetriNetUnfolder]: For 88/89 co-relation queries the response was YES. [2022-07-19 21:32:23,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 434 events. 84/434 cut-off events. For 88/89 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1118 event pairs, 40 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 699. Up to 104 conditions per place. [2022-07-19 21:32:23,783 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 26 selfloop transitions, 6 changer transitions 0/232 dead transitions. [2022-07-19 21:32:23,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 232 transitions, 593 flow [2022-07-19 21:32:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:32:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:32:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-19 21:32:23,786 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8927165354330708 [2022-07-19 21:32:23,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-19 21:32:23,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-19 21:32:23,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:23,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-19 21:32:23,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,795 INFO L186 Difference]: Start difference. First operand has 231 places, 224 transitions, 502 flow. Second operand 4 states and 907 transitions. [2022-07-19 21:32:23,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 232 transitions, 593 flow [2022-07-19 21:32:23,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 579 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:32:23,800 INFO L242 Difference]: Finished difference. Result has 228 places, 224 transitions, 504 flow [2022-07-19 21:32:23,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=504, PETRI_PLACES=228, PETRI_TRANSITIONS=224} [2022-07-19 21:32:23,807 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -3 predicate places. [2022-07-19 21:32:23,808 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 224 transitions, 504 flow [2022-07-19 21:32:23,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:23,809 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:23,810 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:23,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:32:23,811 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)] === [2022-07-19 21:32:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 642704095, now seen corresponding path program 1 times [2022-07-19 21:32:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:23,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689070158] [2022-07-19 21:32:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:32:24,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689070158] [2022-07-19 21:32:24,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689070158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:24,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:32:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822769718] [2022-07-19 21:32:24,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:24,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:32:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:32:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:32:24,040 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-19 21:32:24,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 224 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:24,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-19 21:32:24,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:24,163 INFO L129 PetriNetUnfolder]: 96/423 cut-off events. [2022-07-19 21:32:24,163 INFO L130 PetriNetUnfolder]: For 124/125 co-relation queries the response was YES. [2022-07-19 21:32:24,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 423 events. 96/423 cut-off events. For 124/125 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1109 event pairs, 18 based on Foata normal form. 8/413 useless extension candidates. Maximal degree in co-relation 747. Up to 107 conditions per place. [2022-07-19 21:32:24,166 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 24 selfloop transitions, 6 changer transitions 3/233 dead transitions. [2022-07-19 21:32:24,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 599 flow [2022-07-19 21:32:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:32:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:32:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2022-07-19 21:32:24,169 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8956692913385826 [2022-07-19 21:32:24,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2022-07-19 21:32:24,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2022-07-19 21:32:24,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:24,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2022-07-19 21:32:24,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,175 INFO L186 Difference]: Start difference. First operand has 228 places, 224 transitions, 504 flow. Second operand 4 states and 910 transitions. [2022-07-19 21:32:24,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 599 flow [2022-07-19 21:32:24,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 233 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:32:24,180 INFO L242 Difference]: Finished difference. Result has 230 places, 224 transitions, 510 flow [2022-07-19 21:32:24,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=230, PETRI_TRANSITIONS=224} [2022-07-19 21:32:24,183 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, -1 predicate places. [2022-07-19 21:32:24,183 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 224 transitions, 510 flow [2022-07-19 21:32:24,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:24,184 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:24,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:32:24,184 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)] === [2022-07-19 21:32:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1052780232, now seen corresponding path program 1 times [2022-07-19 21:32:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:24,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869335242] [2022-07-19 21:32:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:32:24,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869335242] [2022-07-19 21:32:24,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869335242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:24,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:24,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:32:24,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089964978] [2022-07-19 21:32:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:32:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:32:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:32:24,320 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-19 21:32:24,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 224 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:24,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-19 21:32:24,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:24,576 INFO L129 PetriNetUnfolder]: 121/551 cut-off events. [2022-07-19 21:32:24,576 INFO L130 PetriNetUnfolder]: For 162/164 co-relation queries the response was YES. [2022-07-19 21:32:24,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 551 events. 121/551 cut-off events. For 162/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1666 event pairs, 73 based on Foata normal form. 7/530 useless extension candidates. Maximal degree in co-relation 1057. Up to 168 conditions per place. [2022-07-19 21:32:24,580 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 52 selfloop transitions, 8 changer transitions 25/253 dead transitions. [2022-07-19 21:32:24,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 253 transitions, 758 flow [2022-07-19 21:32:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:32:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:32:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1774 transitions. [2022-07-19 21:32:24,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7760279965004374 [2022-07-19 21:32:24,585 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1774 transitions. [2022-07-19 21:32:24,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1774 transitions. [2022-07-19 21:32:24,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:24,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1774 transitions. [2022-07-19 21:32:24,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 197.11111111111111) internal successors, (1774), 9 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 254.0) internal successors, (2540), 10 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,597 INFO L186 Difference]: Start difference. First operand has 230 places, 224 transitions, 510 flow. Second operand 9 states and 1774 transitions. [2022-07-19 21:32:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 253 transitions, 758 flow [2022-07-19 21:32:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 253 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:32:24,604 INFO L242 Difference]: Finished difference. Result has 238 places, 225 transitions, 528 flow [2022-07-19 21:32:24,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=238, PETRI_TRANSITIONS=225} [2022-07-19 21:32:24,606 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-19 21:32:24,607 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 225 transitions, 528 flow [2022-07-19 21:32:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:24,608 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:32:24,608 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)] === [2022-07-19 21:32:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1352398940, now seen corresponding path program 1 times [2022-07-19 21:32:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72532881] [2022-07-19 21:32:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:32:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:24,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72532881] [2022-07-19 21:32:24,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72532881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:24,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:24,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:32:24,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135899311] [2022-07-19 21:32:24,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:32:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:32:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:32:24,737 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 254 [2022-07-19 21:32:24,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 225 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:24,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 254 [2022-07-19 21:32:24,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:24,932 INFO L129 PetriNetUnfolder]: 101/483 cut-off events. [2022-07-19 21:32:24,932 INFO L130 PetriNetUnfolder]: For 159/161 co-relation queries the response was YES. [2022-07-19 21:32:24,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 483 events. 101/483 cut-off events. For 159/161 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1332 event pairs, 60 based on Foata normal form. 4/465 useless extension candidates. Maximal degree in co-relation 923. Up to 165 conditions per place. [2022-07-19 21:32:24,936 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 55 selfloop transitions, 6 changer transitions 9/238 dead transitions. [2022-07-19 21:32:24,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 238 transitions, 706 flow [2022-07-19 21:32:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:32:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:32:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1382 transitions. [2022-07-19 21:32:24,940 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772778402699663 [2022-07-19 21:32:24,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1382 transitions. [2022-07-19 21:32:24,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1382 transitions. [2022-07-19 21:32:24,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:24,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1382 transitions. [2022-07-19 21:32:24,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.42857142857142) internal successors, (1382), 7 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,948 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,948 INFO L186 Difference]: Start difference. First operand has 238 places, 225 transitions, 528 flow. Second operand 7 states and 1382 transitions. [2022-07-19 21:32:24,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 238 transitions, 706 flow [2022-07-19 21:32:24,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 238 transitions, 688 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-19 21:32:24,954 INFO L242 Difference]: Finished difference. Result has 238 places, 226 transitions, 532 flow [2022-07-19 21:32:24,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=532, PETRI_PLACES=238, PETRI_TRANSITIONS=226} [2022-07-19 21:32:24,955 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 7 predicate places. [2022-07-19 21:32:24,955 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 226 transitions, 532 flow [2022-07-19 21:32:24,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:24,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:24,956 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:24,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:32:24,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:32:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash -879290637, now seen corresponding path program 1 times [2022-07-19 21:32:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159143899] [2022-07-19 21:32:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:32:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159143899] [2022-07-19 21:32:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159143899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:25,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:25,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:32:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293581490] [2022-07-19 21:32:25,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:32:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:32:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:32:25,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-19 21:32:25,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 226 transitions, 532 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:25,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-19 21:32:25,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:25,231 INFO L129 PetriNetUnfolder]: 52/372 cut-off events. [2022-07-19 21:32:25,231 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2022-07-19 21:32:25,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 372 events. 52/372 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 20 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 584. Up to 84 conditions per place. [2022-07-19 21:32:25,234 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 19 selfloop transitions, 6 changer transitions 3/230 dead transitions. [2022-07-19 21:32:25,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 230 transitions, 601 flow [2022-07-19 21:32:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:32:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:32:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2022-07-19 21:32:25,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8963254593175853 [2022-07-19 21:32:25,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2022-07-19 21:32:25,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2022-07-19 21:32:25,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:25,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2022-07-19 21:32:25,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,241 INFO L186 Difference]: Start difference. First operand has 238 places, 226 transitions, 532 flow. Second operand 3 states and 683 transitions. [2022-07-19 21:32:25,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 230 transitions, 601 flow [2022-07-19 21:32:25,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 230 transitions, 589 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-19 21:32:25,247 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 546 flow [2022-07-19 21:32:25,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-19 21:32:25,248 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 4 predicate places. [2022-07-19 21:32:25,248 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 546 flow [2022-07-19 21:32:25,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,249 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:25,249 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:32:25,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:32:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1058869021, now seen corresponding path program 1 times [2022-07-19 21:32:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246396565] [2022-07-19 21:32:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:32:25,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:25,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246396565] [2022-07-19 21:32:25,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246396565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:32:25,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:32:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:32:25,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220447285] [2022-07-19 21:32:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:32:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:32:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:32:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:32:25,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-19 21:32:25,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 227 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:25,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-19 21:32:25,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:25,513 INFO L129 PetriNetUnfolder]: 134/666 cut-off events. [2022-07-19 21:32:25,513 INFO L130 PetriNetUnfolder]: For 352/371 co-relation queries the response was YES. [2022-07-19 21:32:25,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1232 conditions, 666 events. 134/666 cut-off events. For 352/371 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2551 event pairs, 35 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 1220. Up to 100 conditions per place. [2022-07-19 21:32:25,518 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 35 selfloop transitions, 9 changer transitions 0/249 dead transitions. [2022-07-19 21:32:25,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 249 transitions, 728 flow [2022-07-19 21:32:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:32:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:32:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-19 21:32:25,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-19 21:32:25,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-19 21:32:25,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-19 21:32:25,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:25,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-19 21:32:25,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,527 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,527 INFO L186 Difference]: Start difference. First operand has 235 places, 227 transitions, 546 flow. Second operand 4 states and 928 transitions. [2022-07-19 21:32:25,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 249 transitions, 728 flow [2022-07-19 21:32:25,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 249 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:32:25,534 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 613 flow [2022-07-19 21:32:25,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-19 21:32:25,535 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 8 predicate places. [2022-07-19 21:32:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 613 flow [2022-07-19 21:32:25,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:25,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:25,536 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:25,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:32:25,537 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:32:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 505081247, now seen corresponding path program 1 times [2022-07-19 21:32:25,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:25,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429910276] [2022-07-19 21:32:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:25,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:32:25,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429910276] [2022-07-19 21:32:25,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429910276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:32:25,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959965398] [2022-07-19 21:32:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:25,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:32:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:32:25,674 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) [2022-07-19 21:32:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:32:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:25,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:32:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:32:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:32:26,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:32:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:32:26,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959965398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:32:26,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:32:26,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:32:26,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452196213] [2022-07-19 21:32:26,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:32:26,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:32:26,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:32:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:32:26,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-19 21:32:26,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 613 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:26,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:26,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-19 21:32:26,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:27,045 INFO L129 PetriNetUnfolder]: 138/847 cut-off events. [2022-07-19 21:32:27,045 INFO L130 PetriNetUnfolder]: For 700/714 co-relation queries the response was YES. [2022-07-19 21:32:27,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 847 events. 138/847 cut-off events. For 700/714 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3213 event pairs, 63 based on Foata normal form. 1/785 useless extension candidates. Maximal degree in co-relation 1700. Up to 246 conditions per place. [2022-07-19 21:32:27,052 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 58 selfloop transitions, 20 changer transitions 41/282 dead transitions. [2022-07-19 21:32:27,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 282 transitions, 1001 flow [2022-07-19 21:32:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 21:32:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-19 21:32:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3217 transitions. [2022-07-19 21:32:27,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450208429828624 [2022-07-19 21:32:27,060 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3217 transitions. [2022-07-19 21:32:27,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3217 transitions. [2022-07-19 21:32:27,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:27,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3217 transitions. [2022-07-19 21:32:27,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 189.23529411764707) internal successors, (3217), 17 states have internal predecessors, (3217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:27,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:27,077 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 254.0) internal successors, (4572), 18 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:27,077 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 613 flow. Second operand 17 states and 3217 transitions. [2022-07-19 21:32:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 282 transitions, 1001 flow [2022-07-19 21:32:27,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 282 transitions, 977 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-19 21:32:27,084 INFO L242 Difference]: Finished difference. Result has 261 places, 237 transitions, 671 flow [2022-07-19 21:32:27,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=671, PETRI_PLACES=261, PETRI_TRANSITIONS=237} [2022-07-19 21:32:27,085 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 30 predicate places. [2022-07-19 21:32:27,085 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 237 transitions, 671 flow [2022-07-19 21:32:27,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:27,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:27,087 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:27,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:32:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:32:27,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:32:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1762191461, now seen corresponding path program 2 times [2022-07-19 21:32:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:27,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628858676] [2022-07-19 21:32:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:32:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628858676] [2022-07-19 21:32:27,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628858676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:32:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978986935] [2022-07-19 21:32:27,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:32:27,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:32:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:32:27,540 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) [2022-07-19 21:32:27,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:32:27,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:32:27,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:32:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 21:32:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:32:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:32:27,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:32:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:32:28,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978986935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:32:28,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:32:28,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:32:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589894986] [2022-07-19 21:32:28,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:32:28,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:32:28,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:32:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:32:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:32:28,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-19 21:32:28,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 237 transitions, 671 flow. Second operand has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:28,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:32:28,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-19 21:32:28,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:32:28,737 INFO L129 PetriNetUnfolder]: 168/965 cut-off events. [2022-07-19 21:32:28,738 INFO L130 PetriNetUnfolder]: For 825/841 co-relation queries the response was YES. [2022-07-19 21:32:28,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 965 events. 168/965 cut-off events. For 825/841 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4414 event pairs, 70 based on Foata normal form. 39/927 useless extension candidates. Maximal degree in co-relation 1995. Up to 234 conditions per place. [2022-07-19 21:32:28,745 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 61 selfloop transitions, 21 changer transitions 42/287 dead transitions. [2022-07-19 21:32:28,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 1135 flow [2022-07-19 21:32:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:32:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:32:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3030 transitions. [2022-07-19 21:32:28,752 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7455708661417323 [2022-07-19 21:32:28,752 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3030 transitions. [2022-07-19 21:32:28,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3030 transitions. [2022-07-19 21:32:28,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:32:28,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3030 transitions. [2022-07-19 21:32:28,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 189.375) internal successors, (3030), 16 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:28,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:28,766 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 254.0) internal successors, (4318), 17 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:28,766 INFO L186 Difference]: Start difference. First operand has 261 places, 237 transitions, 671 flow. Second operand 16 states and 3030 transitions. [2022-07-19 21:32:28,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 1135 flow [2022-07-19 21:32:28,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 287 transitions, 1081 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-19 21:32:28,774 INFO L242 Difference]: Finished difference. Result has 269 places, 241 transitions, 720 flow [2022-07-19 21:32:28,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=269, PETRI_TRANSITIONS=241} [2022-07-19 21:32:28,775 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 38 predicate places. [2022-07-19 21:32:28,776 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 241 transitions, 720 flow [2022-07-19 21:32:28,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.47368421052633) internal successors, (3562), 19 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:32:28,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:32:28,777 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:32:28,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:32:29,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 21:32:29,002 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:32:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:32:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash 642213491, now seen corresponding path program 3 times [2022-07-19 21:32:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:32:29,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139798985] [2022-07-19 21:32:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:32:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:32:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:32:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:32:35,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:32:35,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139798985] [2022-07-19 21:32:35,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139798985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:32:35,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319873945] [2022-07-19 21:32:35,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:32:35,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:32:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:32:35,128 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) [2022-07-19 21:32:35,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:32:35,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:32:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:32:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-19 21:32:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:32:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 21:32:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:32:54,634 INFO L356 Elim1Store]: treesize reduction 97, result has 81.5 percent of original size [2022-07-19 21:32:54,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 453 [2022-07-19 21:33:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 21:33:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319873945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:04,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:04,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 17, 15] total 75 [2022-07-19 21:33:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631086248] [2022-07-19 21:33:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:04,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-19 21:33:04,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-19 21:33:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=5073, Unknown=12, NotChecked=0, Total=5550 [2022-07-19 21:33:04,348 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 254 [2022-07-19 21:33:04,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 241 transitions, 720 flow. Second operand has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:04,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:04,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 254 [2022-07-19 21:33:04,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:14,992 INFO L129 PetriNetUnfolder]: 403/1559 cut-off events. [2022-07-19 21:33:14,993 INFO L130 PetriNetUnfolder]: For 1499/1515 co-relation queries the response was YES. [2022-07-19 21:33:14,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1559 events. 403/1559 cut-off events. For 1499/1515 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7962 event pairs, 68 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 3790. Up to 524 conditions per place. [2022-07-19 21:33:15,007 INFO L132 encePairwiseOnDemand]: 191/254 looper letters, 249 selfloop transitions, 131 changer transitions 36/504 dead transitions. [2022-07-19 21:33:15,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 504 transitions, 2409 flow [2022-07-19 21:33:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-19 21:33:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-07-19 21:33:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 11816 transitions. [2022-07-19 21:33:15,028 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41167862866699184 [2022-07-19 21:33:15,028 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 11816 transitions. [2022-07-19 21:33:15,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 11816 transitions. [2022-07-19 21:33:15,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:15,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 11816 transitions. [2022-07-19 21:33:15,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 104.56637168141593) internal successors, (11816), 113 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:15,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:15,110 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 254.0) internal successors, (28956), 114 states have internal predecessors, (28956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:15,111 INFO L186 Difference]: Start difference. First operand has 269 places, 241 transitions, 720 flow. Second operand 113 states and 11816 transitions. [2022-07-19 21:33:15,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 504 transitions, 2409 flow [2022-07-19 21:33:15,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 504 transitions, 2305 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-07-19 21:33:15,124 INFO L242 Difference]: Finished difference. Result has 397 places, 349 transitions, 1528 flow [2022-07-19 21:33:15,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=1528, PETRI_PLACES=397, PETRI_TRANSITIONS=349} [2022-07-19 21:33:15,126 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 166 predicate places. [2022-07-19 21:33:15,126 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 349 transitions, 1528 flow [2022-07-19 21:33:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 105.8) internal successors, (7935), 75 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:15,128 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:15,129 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:15,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:15,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:15,355 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash 329244297, now seen corresponding path program 4 times [2022-07-19 21:33:15,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:15,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946473966] [2022-07-19 21:33:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:15,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:33:15,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946473966] [2022-07-19 21:33:15,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946473966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077056744] [2022-07-19 21:33:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:15,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:15,523 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) [2022-07-19 21:33:15,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:33:15,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:15,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:33:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:33:16,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:33:16,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077056744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:16,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:16,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-19 21:33:16,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446684528] [2022-07-19 21:33:16,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:16,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:33:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:33:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:33:16,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 254 [2022-07-19 21:33:16,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 349 transitions, 1528 flow. Second operand has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:16,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:16,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 254 [2022-07-19 21:33:16,509 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:17,343 INFO L129 PetriNetUnfolder]: 173/1156 cut-off events. [2022-07-19 21:33:17,343 INFO L130 PetriNetUnfolder]: For 1152/1166 co-relation queries the response was YES. [2022-07-19 21:33:17,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1156 events. 173/1156 cut-off events. For 1152/1166 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 5226 event pairs, 47 based on Foata normal form. 11/1103 useless extension candidates. Maximal degree in co-relation 2643. Up to 271 conditions per place. [2022-07-19 21:33:17,356 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 73 selfloop transitions, 25 changer transitions 129/390 dead transitions. [2022-07-19 21:33:17,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 390 transitions, 2128 flow [2022-07-19 21:33:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:33:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:33:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4514 transitions. [2022-07-19 21:33:17,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.740485564304462 [2022-07-19 21:33:17,363 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4514 transitions. [2022-07-19 21:33:17,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4514 transitions. [2022-07-19 21:33:17,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:17,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4514 transitions. [2022-07-19 21:33:17,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 188.08333333333334) internal successors, (4514), 24 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:17,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:17,378 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 254.0) internal successors, (6350), 25 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:17,378 INFO L186 Difference]: Start difference. First operand has 397 places, 349 transitions, 1528 flow. Second operand 24 states and 4514 transitions. [2022-07-19 21:33:17,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 390 transitions, 2128 flow [2022-07-19 21:33:17,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 390 transitions, 1979 flow, removed 55 selfloop flow, removed 14 redundant places. [2022-07-19 21:33:17,393 INFO L242 Difference]: Finished difference. Result has 407 places, 256 transitions, 953 flow [2022-07-19 21:33:17,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=953, PETRI_PLACES=407, PETRI_TRANSITIONS=256} [2022-07-19 21:33:17,394 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 176 predicate places. [2022-07-19 21:33:17,394 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 256 transitions, 953 flow [2022-07-19 21:33:17,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 187.14285714285714) internal successors, (5240), 28 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:17,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:17,396 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:17,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:17,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:17,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash 60836953, now seen corresponding path program 5 times [2022-07-19 21:33:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:17,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369612706] [2022-07-19 21:33:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:17,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 21:33:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369612706] [2022-07-19 21:33:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369612706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:17,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:17,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:33:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548993318] [2022-07-19 21:33:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:33:17,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:33:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:33:17,810 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 254 [2022-07-19 21:33:17,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 256 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:17,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:17,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 254 [2022-07-19 21:33:17,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:18,121 INFO L129 PetriNetUnfolder]: 337/1352 cut-off events. [2022-07-19 21:33:18,122 INFO L130 PetriNetUnfolder]: For 2093/2109 co-relation queries the response was YES. [2022-07-19 21:33:18,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 1352 events. 337/1352 cut-off events. For 2093/2109 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7178 event pairs, 79 based on Foata normal form. 33/1309 useless extension candidates. Maximal degree in co-relation 3414. Up to 207 conditions per place. [2022-07-19 21:33:18,140 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 61 selfloop transitions, 6 changer transitions 0/284 dead transitions. [2022-07-19 21:33:18,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 284 transitions, 1280 flow [2022-07-19 21:33:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:33:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:33:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 928 transitions. [2022-07-19 21:33:18,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9133858267716536 [2022-07-19 21:33:18,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 928 transitions. [2022-07-19 21:33:18,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 928 transitions. [2022-07-19 21:33:18,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:18,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 928 transitions. [2022-07-19 21:33:18,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:18,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:18,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:18,148 INFO L186 Difference]: Start difference. First operand has 407 places, 256 transitions, 953 flow. Second operand 4 states and 928 transitions. [2022-07-19 21:33:18,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 284 transitions, 1280 flow [2022-07-19 21:33:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 284 transitions, 1126 flow, removed 49 selfloop flow, removed 43 redundant places. [2022-07-19 21:33:18,161 INFO L242 Difference]: Finished difference. Result has 278 places, 254 transitions, 830 flow [2022-07-19 21:33:18,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=830, PETRI_PLACES=278, PETRI_TRANSITIONS=254} [2022-07-19 21:33:18,162 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 47 predicate places. [2022-07-19 21:33:18,162 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 254 transitions, 830 flow [2022-07-19 21:33:18,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:18,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:18,163 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:18,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:33:18,163 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1601424871, now seen corresponding path program 6 times [2022-07-19 21:33:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:18,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100922700] [2022-07-19 21:33:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 21:33:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100922700] [2022-07-19 21:33:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100922700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110749804] [2022-07-19 21:33:18,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:33:18,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:18,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:18,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:33:18,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 21:33:18,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:33:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 21:33:18,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 21:33:19,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110749804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:19,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:19,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2022-07-19 21:33:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496373198] [2022-07-19 21:33:19,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:33:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:33:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:33:19,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 254 [2022-07-19 21:33:19,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 254 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:19,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:19,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 254 [2022-07-19 21:33:19,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:19,256 INFO L129 PetriNetUnfolder]: 14/351 cut-off events. [2022-07-19 21:33:19,257 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-07-19 21:33:19,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 351 events. 14/351 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 453 event pairs, 6 based on Foata normal form. 11/353 useless extension candidates. Maximal degree in co-relation 578. Up to 47 conditions per place. [2022-07-19 21:33:19,259 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 23 selfloop transitions, 9 changer transitions 0/246 dead transitions. [2022-07-19 21:33:19,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 246 transitions, 828 flow [2022-07-19 21:33:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:33:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:33:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1338 transitions. [2022-07-19 21:33:19,261 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8779527559055118 [2022-07-19 21:33:19,261 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1338 transitions. [2022-07-19 21:33:19,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1338 transitions. [2022-07-19 21:33:19,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:19,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1338 transitions. [2022-07-19 21:33:19,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:19,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:19,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:19,267 INFO L186 Difference]: Start difference. First operand has 278 places, 254 transitions, 830 flow. Second operand 6 states and 1338 transitions. [2022-07-19 21:33:19,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 246 transitions, 828 flow [2022-07-19 21:33:19,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 246 transitions, 777 flow, removed 2 selfloop flow, removed 9 redundant places. [2022-07-19 21:33:19,273 INFO L242 Difference]: Finished difference. Result has 274 places, 244 transitions, 725 flow [2022-07-19 21:33:19,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=274, PETRI_TRANSITIONS=244} [2022-07-19 21:33:19,274 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 43 predicate places. [2022-07-19 21:33:19,274 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 244 transitions, 725 flow [2022-07-19 21:33:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.375) internal successors, (1795), 8 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:19,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:19,275 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:19,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:33:19,492 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1127042464, now seen corresponding path program 7 times [2022-07-19 21:33:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:19,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551492345] [2022-07-19 21:33:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 21:33:19,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551492345] [2022-07-19 21:33:19,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551492345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925191215] [2022-07-19 21:33:19,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:33:19,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:19,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:19,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:33:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:33:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 21:33:20,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 21:33:20,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925191215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:20,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:20,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2022-07-19 21:33:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592237670] [2022-07-19 21:33:20,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:33:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:33:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:33:20,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 254 [2022-07-19 21:33:20,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 244 transitions, 725 flow. Second operand has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:20,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:20,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 254 [2022-07-19 21:33:20,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:21,922 INFO L129 PetriNetUnfolder]: 34/848 cut-off events. [2022-07-19 21:33:21,922 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2022-07-19 21:33:21,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 848 events. 34/848 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3457 event pairs, 20 based on Foata normal form. 3/804 useless extension candidates. Maximal degree in co-relation 1448. Up to 58 conditions per place. [2022-07-19 21:33:21,926 INFO L132 encePairwiseOnDemand]: 223/254 looper letters, 73 selfloop transitions, 30 changer transitions 113/375 dead transitions. [2022-07-19 21:33:21,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 375 transitions, 1680 flow [2022-07-19 21:33:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 21:33:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-19 21:33:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 10761 transitions. [2022-07-19 21:33:21,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180701988522621 [2022-07-19 21:33:21,946 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 10761 transitions. [2022-07-19 21:33:21,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 10761 transitions. [2022-07-19 21:33:21,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:21,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 10761 transitions. [2022-07-19 21:33:21,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 182.38983050847457) internal successors, (10761), 59 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:21,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:21,989 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 254.0) internal successors, (15240), 60 states have internal predecessors, (15240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:21,990 INFO L186 Difference]: Start difference. First operand has 274 places, 244 transitions, 725 flow. Second operand 59 states and 10761 transitions. [2022-07-19 21:33:21,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 375 transitions, 1680 flow [2022-07-19 21:33:21,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 375 transitions, 1643 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-19 21:33:21,999 INFO L242 Difference]: Finished difference. Result has 359 places, 252 transitions, 898 flow [2022-07-19 21:33:22,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=898, PETRI_PLACES=359, PETRI_TRANSITIONS=252} [2022-07-19 21:33:22,001 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 128 predicate places. [2022-07-19 21:33:22,001 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 252 transitions, 898 flow [2022-07-19 21:33:22,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.64285714285714) internal successors, (5170), 28 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:22,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:22,002 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:22,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:22,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:33:22,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -429007627, now seen corresponding path program 8 times [2022-07-19 21:33:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:22,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486236932] [2022-07-19 21:33:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 21:33:22,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486236932] [2022-07-19 21:33:22,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486236932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450292073] [2022-07-19 21:33:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:22,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:22,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:22,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:22,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:33:22,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:22,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:33:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 21:33:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 21:33:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450292073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:23,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-19 21:33:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197395158] [2022-07-19 21:33:23,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:23,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 21:33:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 21:33:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-07-19 21:33:23,517 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 254 [2022-07-19 21:33:23,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 252 transitions, 898 flow. Second operand has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:23,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:23,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 254 [2022-07-19 21:33:23,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:24,336 INFO L129 PetriNetUnfolder]: 21/576 cut-off events. [2022-07-19 21:33:24,337 INFO L130 PetriNetUnfolder]: For 425/425 co-relation queries the response was YES. [2022-07-19 21:33:24,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 576 events. 21/576 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1529 event pairs, 14 based on Foata normal form. 3/554 useless extension candidates. Maximal degree in co-relation 1129. Up to 64 conditions per place. [2022-07-19 21:33:24,342 INFO L132 encePairwiseOnDemand]: 230/254 looper letters, 60 selfloop transitions, 40 changer transitions 48/309 dead transitions. [2022-07-19 21:33:24,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 309 transitions, 1503 flow [2022-07-19 21:33:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 21:33:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-19 21:33:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5729 transitions. [2022-07-19 21:33:24,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7275844551689103 [2022-07-19 21:33:24,349 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5729 transitions. [2022-07-19 21:33:24,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5729 transitions. [2022-07-19 21:33:24,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:24,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5729 transitions. [2022-07-19 21:33:24,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 184.80645161290323) internal successors, (5729), 31 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:24,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:24,364 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 254.0) internal successors, (8128), 32 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:24,364 INFO L186 Difference]: Start difference. First operand has 359 places, 252 transitions, 898 flow. Second operand 31 states and 5729 transitions. [2022-07-19 21:33:24,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 309 transitions, 1503 flow [2022-07-19 21:33:24,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 309 transitions, 1310 flow, removed 71 selfloop flow, removed 43 redundant places. [2022-07-19 21:33:24,374 INFO L242 Difference]: Finished difference. Result has 325 places, 256 transitions, 910 flow [2022-07-19 21:33:24,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=910, PETRI_PLACES=325, PETRI_TRANSITIONS=256} [2022-07-19 21:33:24,375 INFO L279 CegarLoopForPetriNet]: 231 programPoint places, 94 predicate places. [2022-07-19 21:33:24,375 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 256 transitions, 910 flow [2022-07-19 21:33:24,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 185.5) internal successors, (5194), 28 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:24,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:24,376 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:24,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:24,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:33:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1560661591, now seen corresponding path program 9 times [2022-07-19 21:33:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679077227] [2022-07-19 21:33:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:35,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:35,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679077227] [2022-07-19 21:33:35,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679077227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574834128] [2022-07-19 21:33:35,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:33:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:35,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:35,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:33:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:33:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:35,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 153 conjunts are in the unsatisfiable core [2022-07-19 21:33:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:33:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:33:53,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:33:53,356 INFO L356 Elim1Store]: treesize reduction 422, result has 34.1 percent of original size [2022-07-19 21:33:53,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 249 [2022-07-19 21:33:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 21:33:53,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:11,894 INFO L356 Elim1Store]: treesize reduction 577, result has 74.2 percent of original size [2022-07-19 21:34:11,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 291 treesize of output 1714