./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a --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 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:29:41,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:29:41,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:29:41,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:29:41,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:29:41,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:29:41,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:29:41,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:29:41,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:29:41,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:29:41,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:29:41,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:29:41,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:29:41,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:29:41,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:29:41,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:29:41,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:29:41,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:29:41,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:29:41,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:29:41,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:29:41,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:29:41,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:29:41,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:29:41,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:29:41,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:29:41,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:29:41,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:29:41,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:29:41,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:29:41,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:29:41,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:29:41,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:29:41,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:29:41,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:29:41,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:29:41,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:29:41,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:29:41,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:29:41,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:29:41,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:29:41,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:29:41,849 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:29:41,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:29:41,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:29:41,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:29:41,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:29:41,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:29:41,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:29:41,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:29:41,852 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:29:41,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:29:41,854 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:29:41,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:29:41,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:29:41,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:29:41,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:29:41,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:29:41,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:29:41,855 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:29:41,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:29:41,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:29:41,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:29:41,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:29:41,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:29:41,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:29:41,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:29:41,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:29:41,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:29:41,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:29:41,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:29:41,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:29:41,857 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:29:41,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:29:41,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:29:41,858 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19006bb1633253053764e43b8bfff1653449498b05ea53714e3311a41e35d730 [2022-11-21 16:29:42,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:29:42,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:29:42,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:29:42,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:29:42,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:29:42,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-11-21 16:29:45,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:29:45,583 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:29:45,586 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c [2022-11-21 16:29:45,594 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/data/e44ea8834/adc034640019442ba7e351c36bddc539/FLAGeb6852517 [2022-11-21 16:29:45,610 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/data/e44ea8834/adc034640019442ba7e351c36bddc539 [2022-11-21 16:29:45,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:29:45,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:29:45,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:29:45,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:29:45,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:29:45,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:45,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386423a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45, skipping insertion in model container [2022-11-21 16:29:45,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:45,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:29:45,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:29:45,898 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-11-21 16:29:45,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:29:45,914 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:29:45,940 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/sv-benchmarks/c/weaver/bench-exp2x6.wvr.c[2453,2466] [2022-11-21 16:29:45,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:29:45,967 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:29:45,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45 WrapperNode [2022-11-21 16:29:45,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:29:45,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:29:45,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:29:45,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:29:45,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:45,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,030 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-21 16:29:46,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:29:46,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:29:46,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:29:46,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:29:46,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:29:46,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:29:46,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:29:46,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:29:46,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (1/1) ... [2022-11-21 16:29:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:29:46,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:46,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:29:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:29:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:29:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:29:46,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:29:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:29:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:29:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:29:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:29:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-21 16:29:46,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-21 16:29:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:29:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:29:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:29:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:29:46,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:29:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:29:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:29:46,189 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:29:46,326 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:29:46,328 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:29:46,664 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:29:46,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:29:46,674 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:29:46,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:29:46 BoogieIcfgContainer [2022-11-21 16:29:46,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:29:46,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:29:46,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:29:46,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:29:46,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:29:45" (1/3) ... [2022-11-21 16:29:46,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fdbb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:29:46, skipping insertion in model container [2022-11-21 16:29:46,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:29:45" (2/3) ... [2022-11-21 16:29:46,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53fdbb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:29:46, skipping insertion in model container [2022-11-21 16:29:46,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:29:46" (3/3) ... [2022-11-21 16:29:46,686 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x6.wvr.c [2022-11-21 16:29:46,696 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:29:46,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:29:46,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:29:46,705 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:29:46,796 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:29:46,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 306 flow [2022-11-21 16:29:46,906 INFO L130 PetriNetUnfolder]: 10/133 cut-off events. [2022-11-21 16:29:46,907 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:29:46,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 133 events. 10/133 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-21 16:29:46,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 306 flow [2022-11-21 16:29:46,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 264 flow [2022-11-21 16:29:46,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:29:46,938 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41079b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:29:46,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:29:47,022 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2022-11-21 16:29:47,025 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:29:47,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:47,026 INFO L209 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] [2022-11-21 16:29:47,027 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 2 more)] === [2022-11-21 16:29:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1558722128, now seen corresponding path program 1 times [2022-11-21 16:29:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363607735] [2022-11-21 16:29:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:47,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363607735] [2022-11-21 16:29:47,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363607735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:47,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:29:47,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:29:47,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952526364] [2022-11-21 16:29:47,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:47,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:29:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:29:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:29:47,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 137 [2022-11-21 16:29:47,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 264 flow. Second operand has 2 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 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) [2022-11-21 16:29:47,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:47,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 137 [2022-11-21 16:29:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:29:47,644 INFO L130 PetriNetUnfolder]: 4/114 cut-off events. [2022-11-21 16:29:47,647 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 16:29:47,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 4/114 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 18/126 useless extension candidates. Maximal degree in co-relation 92. Up to 9 conditions per place. [2022-11-21 16:29:47,653 INFO L137 encePairwiseOnDemand]: 131/137 looper letters, 8 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2022-11-21 16:29:47,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 268 flow [2022-11-21 16:29:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:29:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:29:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-11-21 16:29:47,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9416058394160584 [2022-11-21 16:29:47,675 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-11-21 16:29:47,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-11-21 16:29:47,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:47,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-11-21 16:29:47,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 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) [2022-11-21 16:29:47,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2022-11-21 16:29:47,697 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2022-11-21 16:29:47,699 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 264 flow. Second operand 2 states and 258 transitions. [2022-11-21 16:29:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 268 flow [2022-11-21 16:29:47,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 252 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-21 16:29:47,712 INFO L231 Difference]: Finished difference. Result has 116 places, 112 transitions, 232 flow [2022-11-21 16:29:47,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=116, PETRI_TRANSITIONS=112} [2022-11-21 16:29:47,722 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2022-11-21 16:29:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 112 transitions, 232 flow [2022-11-21 16:29:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 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) [2022-11-21 16:29:47,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:47,724 INFO L209 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] [2022-11-21 16:29:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:29:47,725 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 2 more)] === [2022-11-21 16:29:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1566756150, now seen corresponding path program 1 times [2022-11-21 16:29:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:47,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424600143] [2022-11-21 16:29:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424600143] [2022-11-21 16:29:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424600143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:48,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:29:48,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:29:48,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644187348] [2022-11-21 16:29:48,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:48,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:29:48,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:29:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:29:48,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2022-11-21 16:29:48,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 112 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-11-21 16:29:48,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:48,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2022-11-21 16:29:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:29:50,483 INFO L130 PetriNetUnfolder]: 5788/8836 cut-off events. [2022-11-21 16:29:50,484 INFO L131 PetriNetUnfolder]: For 299/351 co-relation queries the response was YES. [2022-11-21 16:29:50,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 8836 events. 5788/8836 cut-off events. For 299/351 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52422 event pairs, 3267 based on Foata normal form. 1/7221 useless extension candidates. Maximal degree in co-relation 16914. Up to 7342 conditions per place. [2022-11-21 16:29:50,563 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 59 selfloop transitions, 7 changer transitions 4/134 dead transitions. [2022-11-21 16:29:50,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 423 flow [2022-11-21 16:29:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:29:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:29:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2022-11-21 16:29:50,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6579770594369134 [2022-11-21 16:29:50,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2022-11-21 16:29:50,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2022-11-21 16:29:50,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:50,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2022-11-21 16:29:50,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 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) [2022-11-21 16:29:50,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:29:50,575 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:29:50,576 INFO L175 Difference]: Start difference. First operand has 116 places, 112 transitions, 232 flow. Second operand 7 states and 631 transitions. [2022-11-21 16:29:50,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 423 flow [2022-11-21 16:29:50,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:29:50,580 INFO L231 Difference]: Finished difference. Result has 123 places, 116 transitions, 273 flow [2022-11-21 16:29:50,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2022-11-21 16:29:50,582 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-11-21 16:29:50,582 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 273 flow [2022-11-21 16:29:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2022-11-21 16:29:50,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:50,583 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:29:50,584 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 2 more)] === [2022-11-21 16:29:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1883602194, now seen corresponding path program 1 times [2022-11-21 16:29:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:50,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048275322] [2022-11-21 16:29:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:50,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048275322] [2022-11-21 16:29:51,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048275322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:51,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:29:51,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:29:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334617772] [2022-11-21 16:29:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:51,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:29:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:29:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:29:51,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:29:51,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:51,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:51,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:29:51,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:29:52,471 INFO L130 PetriNetUnfolder]: 5753/8322 cut-off events. [2022-11-21 16:29:52,471 INFO L131 PetriNetUnfolder]: For 1125/1125 co-relation queries the response was YES. [2022-11-21 16:29:52,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17835 conditions, 8322 events. 5753/8322 cut-off events. For 1125/1125 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46213 event pairs, 2003 based on Foata normal form. 0/6835 useless extension candidates. Maximal degree in co-relation 17828. Up to 7344 conditions per place. [2022-11-21 16:29:52,545 INFO L137 encePairwiseOnDemand]: 126/137 looper letters, 68 selfloop transitions, 13 changer transitions 1/144 dead transitions. [2022-11-21 16:29:52,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 144 transitions, 515 flow [2022-11-21 16:29:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:29:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:29:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2022-11-21 16:29:52,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6715328467153284 [2022-11-21 16:29:52,549 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2022-11-21 16:29:52,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2022-11-21 16:29:52,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:52,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2022-11-21 16:29:52,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:52,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:52,555 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:52,555 INFO L175 Difference]: Start difference. First operand has 123 places, 116 transitions, 273 flow. Second operand 6 states and 552 transitions. [2022-11-21 16:29:52,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 144 transitions, 515 flow [2022-11-21 16:29:52,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 144 transitions, 498 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-21 16:29:52,561 INFO L231 Difference]: Finished difference. Result has 123 places, 122 transitions, 327 flow [2022-11-21 16:29:52,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-11-21 16:29:52,562 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-11-21 16:29:52,562 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 327 flow [2022-11-21 16:29:52,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:52,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:52,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:29:52,564 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 2 more)] === [2022-11-21 16:29:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 208265396, now seen corresponding path program 1 times [2022-11-21 16:29:52,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:52,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547537882] [2022-11-21 16:29:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:52,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547537882] [2022-11-21 16:29:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547537882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:53,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:29:53,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:29:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414518848] [2022-11-21 16:29:53,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:53,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:29:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:29:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:29:53,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:29:53,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:53,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:53,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:29:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:29:54,493 INFO L130 PetriNetUnfolder]: 5726/8796 cut-off events. [2022-11-21 16:29:54,494 INFO L131 PetriNetUnfolder]: For 2583/2629 co-relation queries the response was YES. [2022-11-21 16:29:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19757 conditions, 8796 events. 5726/8796 cut-off events. For 2583/2629 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52951 event pairs, 3085 based on Foata normal form. 0/7855 useless extension candidates. Maximal degree in co-relation 19750. Up to 7344 conditions per place. [2022-11-21 16:29:54,563 INFO L137 encePairwiseOnDemand]: 126/137 looper letters, 72 selfloop transitions, 21 changer transitions 1/156 dead transitions. [2022-11-21 16:29:54,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 657 flow [2022-11-21 16:29:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:29:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:29:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2022-11-21 16:29:54,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6715328467153284 [2022-11-21 16:29:54,566 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2022-11-21 16:29:54,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2022-11-21 16:29:54,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:54,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2022-11-21 16:29:54,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:54,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:54,576 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:54,576 INFO L175 Difference]: Start difference. First operand has 123 places, 122 transitions, 327 flow. Second operand 6 states and 552 transitions. [2022-11-21 16:29:54,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 657 flow [2022-11-21 16:29:54,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 619 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:29:54,583 INFO L231 Difference]: Finished difference. Result has 126 places, 132 transitions, 420 flow [2022-11-21 16:29:54,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=126, PETRI_TRANSITIONS=132} [2022-11-21 16:29:54,587 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 3 predicate places. [2022-11-21 16:29:54,588 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 132 transitions, 420 flow [2022-11-21 16:29:54,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:54,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:54,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:54,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:29:54,589 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 2 more)] === [2022-11-21 16:29:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash -877976618, now seen corresponding path program 2 times [2022-11-21 16:29:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:54,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597728798] [2022-11-21 16:29:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597728798] [2022-11-21 16:29:55,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597728798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:55,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:29:55,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:29:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280795563] [2022-11-21 16:29:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:29:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:29:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:29:55,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:29:55,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 132 transitions, 420 flow. Second operand has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:55,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:55,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:29:55,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:29:56,499 INFO L130 PetriNetUnfolder]: 5629/8623 cut-off events. [2022-11-21 16:29:56,499 INFO L131 PetriNetUnfolder]: For 3592/3662 co-relation queries the response was YES. [2022-11-21 16:29:56,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20618 conditions, 8623 events. 5629/8623 cut-off events. For 3592/3662 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53307 event pairs, 2089 based on Foata normal form. 27/8490 useless extension candidates. Maximal degree in co-relation 20609. Up to 7289 conditions per place. [2022-11-21 16:29:56,693 INFO L137 encePairwiseOnDemand]: 126/137 looper letters, 74 selfloop transitions, 21 changer transitions 1/158 dead transitions. [2022-11-21 16:29:56,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 158 transitions, 710 flow [2022-11-21 16:29:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:29:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:29:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-11-21 16:29:56,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6690997566909975 [2022-11-21 16:29:56,696 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-11-21 16:29:56,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-11-21 16:29:56,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:29:56,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-11-21 16:29:56,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 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) [2022-11-21 16:29:56,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:56,700 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-11-21 16:29:56,700 INFO L175 Difference]: Start difference. First operand has 126 places, 132 transitions, 420 flow. Second operand 6 states and 550 transitions. [2022-11-21 16:29:56,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 158 transitions, 710 flow [2022-11-21 16:29:56,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 158 transitions, 689 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:29:56,705 INFO L231 Difference]: Finished difference. Result has 130 places, 134 transitions, 478 flow [2022-11-21 16:29:56,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=130, PETRI_TRANSITIONS=134} [2022-11-21 16:29:56,706 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 7 predicate places. [2022-11-21 16:29:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 134 transitions, 478 flow [2022-11-21 16:29:56,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:56,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:29:56,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:29:56,708 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 2 more)] === [2022-11-21 16:29:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash -564085913, now seen corresponding path program 1 times [2022-11-21 16:29:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:56,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460542312] [2022-11-21 16:29:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:57,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460542312] [2022-11-21 16:29:57,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460542312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787151759] [2022-11-21 16:29:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:57,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:57,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:29:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:29:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:57,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:29:58,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787151759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:58,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:58,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-21 16:29:58,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129877873] [2022-11-21 16:29:58,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:58,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:29:58,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:29:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:29:58,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:29:58,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 478 flow. Second operand has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 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) [2022-11-21 16:29:58,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:29:58,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:29:58,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:30:01,068 INFO L130 PetriNetUnfolder]: 9103/13975 cut-off events. [2022-11-21 16:30:01,068 INFO L131 PetriNetUnfolder]: For 7604/7664 co-relation queries the response was YES. [2022-11-21 16:30:01,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34771 conditions, 13975 events. 9103/13975 cut-off events. For 7604/7664 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 90506 event pairs, 768 based on Foata normal form. 367/14179 useless extension candidates. Maximal degree in co-relation 34760. Up to 5605 conditions per place. [2022-11-21 16:30:01,208 INFO L137 encePairwiseOnDemand]: 122/137 looper letters, 189 selfloop transitions, 32 changer transitions 2/285 dead transitions. [2022-11-21 16:30:01,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 285 transitions, 1424 flow [2022-11-21 16:30:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:30:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:30:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1305 transitions. [2022-11-21 16:30:01,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6803962460896767 [2022-11-21 16:30:01,214 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1305 transitions. [2022-11-21 16:30:01,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1305 transitions. [2022-11-21 16:30:01,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:30:01,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1305 transitions. [2022-11-21 16:30:01,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.21428571428571) internal successors, (1305), 14 states have internal predecessors, (1305), 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) [2022-11-21 16:30:01,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 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) [2022-11-21 16:30:01,224 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 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) [2022-11-21 16:30:01,224 INFO L175 Difference]: Start difference. First operand has 130 places, 134 transitions, 478 flow. Second operand 14 states and 1305 transitions. [2022-11-21 16:30:01,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 285 transitions, 1424 flow [2022-11-21 16:30:01,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 285 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-11-21 16:30:01,235 INFO L231 Difference]: Finished difference. Result has 149 places, 144 transitions, 621 flow [2022-11-21 16:30:01,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=621, PETRI_PLACES=149, PETRI_TRANSITIONS=144} [2022-11-21 16:30:01,237 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 26 predicate places. [2022-11-21 16:30:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 144 transitions, 621 flow [2022-11-21 16:30:01,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 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) [2022-11-21 16:30:01,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:30:01,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:01,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:01,446 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 2 more)] === [2022-11-21 16:30:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash -938481652, now seen corresponding path program 2 times [2022-11-21 16:30:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:01,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758508728] [2022-11-21 16:30:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:01,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:02,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758508728] [2022-11-21 16:30:02,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758508728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:30:02,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:30:02,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:30:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387778208] [2022-11-21 16:30:02,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:30:02,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:30:02,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:30:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:30:02,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:30:02,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 144 transitions, 621 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2022-11-21 16:30:02,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:30:02,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:30:02,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:30:03,850 INFO L130 PetriNetUnfolder]: 9999/15204 cut-off events. [2022-11-21 16:30:03,850 INFO L131 PetriNetUnfolder]: For 22426/22488 co-relation queries the response was YES. [2022-11-21 16:30:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45596 conditions, 15204 events. 9999/15204 cut-off events. For 22426/22488 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 97871 event pairs, 3665 based on Foata normal form. 258/15296 useless extension candidates. Maximal degree in co-relation 45577. Up to 9826 conditions per place. [2022-11-21 16:30:04,067 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 110 selfloop transitions, 21 changer transitions 2/195 dead transitions. [2022-11-21 16:30:04,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 1130 flow [2022-11-21 16:30:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:30:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:30:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-11-21 16:30:04,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-11-21 16:30:04,071 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-11-21 16:30:04,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-11-21 16:30:04,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:30:04,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-11-21 16:30:04,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 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) [2022-11-21 16:30:04,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:30:04,077 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:30:04,077 INFO L175 Difference]: Start difference. First operand has 149 places, 144 transitions, 621 flow. Second operand 7 states and 649 transitions. [2022-11-21 16:30:04,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 1130 flow [2022-11-21 16:30:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 195 transitions, 1116 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-21 16:30:04,219 INFO L231 Difference]: Finished difference. Result has 154 places, 145 transitions, 684 flow [2022-11-21 16:30:04,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=684, PETRI_PLACES=154, PETRI_TRANSITIONS=145} [2022-11-21 16:30:04,220 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 31 predicate places. [2022-11-21 16:30:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 145 transitions, 684 flow [2022-11-21 16:30:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2022-11-21 16:30:04,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:30:04,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:30:04,221 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 2 more)] === [2022-11-21 16:30:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1766650179, now seen corresponding path program 1 times [2022-11-21 16:30:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:04,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043789770] [2022-11-21 16:30:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:04,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:04,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043789770] [2022-11-21 16:30:04,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043789770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358714542] [2022-11-21 16:30:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:04,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:04,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:04,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:30:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:30:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:30:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:05,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:30:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:05,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358714542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:30:05,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:30:05,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-21 16:30:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147957584] [2022-11-21 16:30:05,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:30:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:30:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:30:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:30:05,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:30:05,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 145 transitions, 684 flow. Second operand has 14 states, 14 states have (on average 82.35714285714286) internal successors, (1153), 14 states have internal predecessors, (1153), 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) [2022-11-21 16:30:05,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:30:05,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:30:05,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:30:08,806 INFO L130 PetriNetUnfolder]: 16638/26156 cut-off events. [2022-11-21 16:30:08,806 INFO L131 PetriNetUnfolder]: For 61866/61927 co-relation queries the response was YES. [2022-11-21 16:30:08,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82564 conditions, 26156 events. 16638/26156 cut-off events. For 61866/61927 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 196083 event pairs, 2694 based on Foata normal form. 683/26684 useless extension candidates. Maximal degree in co-relation 82543. Up to 12015 conditions per place. [2022-11-21 16:30:09,125 INFO L137 encePairwiseOnDemand]: 122/137 looper letters, 260 selfloop transitions, 32 changer transitions 2/356 dead transitions. [2022-11-21 16:30:09,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 356 transitions, 2532 flow [2022-11-21 16:30:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:30:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:30:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1303 transitions. [2022-11-21 16:30:09,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6793534932221064 [2022-11-21 16:30:09,129 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1303 transitions. [2022-11-21 16:30:09,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1303 transitions. [2022-11-21 16:30:09,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:30:09,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1303 transitions. [2022-11-21 16:30:09,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.07142857142857) internal successors, (1303), 14 states have internal predecessors, (1303), 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) [2022-11-21 16:30:09,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 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) [2022-11-21 16:30:09,137 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 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) [2022-11-21 16:30:09,137 INFO L175 Difference]: Start difference. First operand has 154 places, 145 transitions, 684 flow. Second operand 14 states and 1303 transitions. [2022-11-21 16:30:09,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 356 transitions, 2532 flow [2022-11-21 16:30:09,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 356 transitions, 2507 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:30:09,436 INFO L231 Difference]: Finished difference. Result has 170 places, 157 transitions, 838 flow [2022-11-21 16:30:09,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=838, PETRI_PLACES=170, PETRI_TRANSITIONS=157} [2022-11-21 16:30:09,439 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 47 predicate places. [2022-11-21 16:30:09,440 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 157 transitions, 838 flow [2022-11-21 16:30:09,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.35714285714286) internal successors, (1153), 14 states have internal predecessors, (1153), 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) [2022-11-21 16:30:09,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:30:09,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:30:09,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:30:09,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:09,647 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 2 more)] === [2022-11-21 16:30:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1100175370, now seen corresponding path program 3 times [2022-11-21 16:30:09,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628211113] [2022-11-21 16:30:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628211113] [2022-11-21 16:30:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628211113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:30:10,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:30:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:30:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502121484] [2022-11-21 16:30:10,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:30:10,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:30:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:30:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:30:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:30:10,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 137 [2022-11-21 16:30:10,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 157 transitions, 838 flow. Second operand has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2022-11-21 16:30:10,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:30:10,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 137 [2022-11-21 16:30:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:30:14,026 INFO L130 PetriNetUnfolder]: 18218/27815 cut-off events. [2022-11-21 16:30:14,026 INFO L131 PetriNetUnfolder]: For 93385/93403 co-relation queries the response was YES. [2022-11-21 16:30:14,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103117 conditions, 27815 events. 18218/27815 cut-off events. For 93385/93403 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 195927 event pairs, 9383 based on Foata normal form. 486/28016 useless extension candidates. Maximal degree in co-relation 103089. Up to 19090 conditions per place. [2022-11-21 16:30:14,321 INFO L137 encePairwiseOnDemand]: 127/137 looper letters, 134 selfloop transitions, 21 changer transitions 2/219 dead transitions. [2022-11-21 16:30:14,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 219 transitions, 1567 flow [2022-11-21 16:30:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:30:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:30:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2022-11-21 16:30:14,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6767466110531803 [2022-11-21 16:30:14,324 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2022-11-21 16:30:14,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2022-11-21 16:30:14,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:30:14,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2022-11-21 16:30:14,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 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) [2022-11-21 16:30:14,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:30:14,330 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 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) [2022-11-21 16:30:14,331 INFO L175 Difference]: Start difference. First operand has 170 places, 157 transitions, 838 flow. Second operand 7 states and 649 transitions. [2022-11-21 16:30:14,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 219 transitions, 1567 flow [2022-11-21 16:30:14,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1534 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-21 16:30:14,551 INFO L231 Difference]: Finished difference. Result has 173 places, 158 transitions, 880 flow [2022-11-21 16:30:14,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=173, PETRI_TRANSITIONS=158} [2022-11-21 16:30:14,552 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 50 predicate places. [2022-11-21 16:30:14,552 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 158 transitions, 880 flow [2022-11-21 16:30:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.0) internal successors, (581), 7 states have internal predecessors, (581), 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) [2022-11-21 16:30:14,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:30:14,553 INFO L209 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] [2022-11-21 16:30:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:30:14,553 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 2 more)] === [2022-11-21 16:30:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:30:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash 468194223, now seen corresponding path program 1 times [2022-11-21 16:30:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:30:14,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037068753] [2022-11-21 16:30:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:30:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:30:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:30:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:30:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037068753] [2022-11-21 16:30:16,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037068753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:30:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163062584] [2022-11-21 16:30:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:30:16,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:30:16,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:30:16,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:30:16,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ac734-8aea-4798-9a8b-5e44b9629306/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:43:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 16:43:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates...