./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8 --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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- 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-2329fc7 [2022-12-13 16:08:30,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:08:30,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:08:30,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:08:30,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:08:30,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:08:30,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:08:30,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:08:30,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:08:30,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:08:30,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:08:30,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:08:30,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:08:30,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:08:30,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:08:30,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:08:30,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:08:30,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:08:30,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:08:30,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:08:30,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:08:30,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:08:30,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:08:30,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:08:30,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:08:30,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:08:30,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:08:30,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:08:30,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:08:30,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:08:30,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:08:30,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:08:30,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:08:30,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:08:30,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:08:30,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:08:30,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:08:30,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:08:30,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:08:30,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:08:30,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:08:30,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:08:30,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:08:30,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:08:30,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:08:30,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:08:30,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:08:30,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:08:30,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:08:30,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:08:30,781 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:08:30,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:08:30,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:08:30,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:08:30,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:08:30,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:08:30,782 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:08:30,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:08:30,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:08:30,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:08:30,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:08:30,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:08:30,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:08:30,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:08:30,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:08:30,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:08:30,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:08:30,784 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:08:30,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:08:30,785 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:08:30,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:08:30,785 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:08:30,785 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2022-12-13 16:08:30,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:08:30,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:08:30,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:08:30,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:08:30,973 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:08:30,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-12-13 16:08:33,495 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:08:33,698 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:08:33,698 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2022-12-13 16:08:33,708 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/data/81394c57f/2c709b73086047f99cf2c3c9d41d0250/FLAG4565286b2 [2022-12-13 16:08:34,055 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/data/81394c57f/2c709b73086047f99cf2c3c9d41d0250 [2022-12-13 16:08:34,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:08:34,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:08:34,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:08:34,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:08:34,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:08:34,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7006021f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34, skipping insertion in model container [2022-12-13 16:08:34,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:08:34,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:08:34,376 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_b8a211e4-7054-4d10-8e5c-b67690714da7/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-12-13 16:08:34,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:08:34,405 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:08:34,430 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_b8a211e4-7054-4d10-8e5c-b67690714da7/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2022-12-13 16:08:34,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:08:34,473 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:08:34,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34 WrapperNode [2022-12-13 16:08:34,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:08:34,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:08:34,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:08:34,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:08:34,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,510 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-12-13 16:08:34,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:08:34,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:08:34,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:08:34,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:08:34,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:08:34,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:08:34,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:08:34,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:08:34,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (1/1) ... [2022-12-13 16:08:34,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:08:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:34,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:08:34,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:08:34,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:08:34,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 16:08:34,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 16:08:34,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:08:34,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:08:34,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:08:34,603 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:08:34,724 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:08:34,726 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:08:35,011 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:08:35,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:08:35,017 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-12-13 16:08:35,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:08:35 BoogieIcfgContainer [2022-12-13 16:08:35,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:08:35,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:08:35,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:08:35,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:08:35,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:08:34" (1/3) ... [2022-12-13 16:08:35,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145ec634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:08:35, skipping insertion in model container [2022-12-13 16:08:35,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:08:34" (2/3) ... [2022-12-13 16:08:35,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145ec634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:08:35, skipping insertion in model container [2022-12-13 16:08:35,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:08:35" (3/3) ... [2022-12-13 16:08:35,025 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2022-12-13 16:08:35,032 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:08:35,040 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:08:35,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-12-13 16:08:35,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:08:35,090 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 16:08:35,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-12-13 16:08:35,198 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-12-13 16:08:35,198 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:08:35,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1776 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-12-13 16:08:35,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-12-13 16:08:35,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-12-13 16:08:35,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:08:35,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 250 transitions, 505 flow [2022-12-13 16:08:35,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 250 transitions, 505 flow [2022-12-13 16:08:35,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 250 transitions, 505 flow [2022-12-13 16:08:35,261 INFO L130 PetriNetUnfolder]: 72/389 cut-off events. [2022-12-13 16:08:35,261 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:08:35,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 389 events. 72/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1740 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-12-13 16:08:35,269 INFO L119 LiptonReduction]: Number of co-enabled transitions 20590 [2022-12-13 16:08:37,545 INFO L134 LiptonReduction]: Checked pairs total: 33032 [2022-12-13 16:08:37,545 INFO L136 LiptonReduction]: Total number of compositions: 197 [2022-12-13 16:08:37,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:08:37,565 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;@76a3c60c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:08:37,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 16:08:37,570 INFO L130 PetriNetUnfolder]: 9/35 cut-off events. [2022-12-13 16:08:37,570 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:08:37,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:37,571 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:37,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:08:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -325144679, now seen corresponding path program 1 times [2022-12-13 16:08:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:37,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833346276] [2022-12-13 16:08:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:37,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:37,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833346276] [2022-12-13 16:08:37,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833346276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:37,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:37,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:08:37,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091301444] [2022-12-13 16:08:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:37,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:37,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 452 [2022-12-13 16:08:37,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 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) [2022-12-13 16:08:37,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:37,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 452 [2022-12-13 16:08:37,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:38,010 INFO L130 PetriNetUnfolder]: 664/1344 cut-off events. [2022-12-13 16:08:38,010 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:08:38,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2576 conditions, 1344 events. 664/1344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7371 event pairs, 544 based on Foata normal form. 199/1319 useless extension candidates. Maximal degree in co-relation 2486. Up to 1225 conditions per place. [2022-12-13 16:08:38,016 INFO L137 encePairwiseOnDemand]: 418/452 looper letters, 54 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 16:08:38,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 249 flow [2022-12-13 16:08:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2022-12-13 16:08:38,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5250737463126843 [2022-12-13 16:08:38,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2022-12-13 16:08:38,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2022-12-13 16:08:38,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:38,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2022-12-13 16:08:38,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,048 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 712 transitions. [2022-12-13 16:08:38,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 249 flow [2022-12-13 16:08:38,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 249 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:38,052 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2022-12-13 16:08:38,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2022-12-13 16:08:38,057 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2022-12-13 16:08:38,057 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2022-12-13 16:08:38,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 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) [2022-12-13 16:08:38,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:38,057 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:08:38,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:08:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2020132011, now seen corresponding path program 1 times [2022-12-13 16:08:38,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:38,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159721055] [2022-12-13 16:08:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159721055] [2022-12-13 16:08:38,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159721055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013730591] [2022-12-13 16:08:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:38,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:38,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:38,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:08:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:08:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013730591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:38,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:38,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:08:38,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012710855] [2022-12-13 16:08:38,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:38,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:08:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:08:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:08:38,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 452 [2022-12-13 16:08:38,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:38,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 452 [2022-12-13 16:08:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:38,475 INFO L130 PetriNetUnfolder]: 664/1347 cut-off events. [2022-12-13 16:08:38,475 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:08:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2592 conditions, 1347 events. 664/1347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7370 event pairs, 544 based on Foata normal form. 0/1123 useless extension candidates. Maximal degree in co-relation 2580. Up to 1225 conditions per place. [2022-12-13 16:08:38,480 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 54 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-12-13 16:08:38,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 277 flow [2022-12-13 16:08:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:08:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:08:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1304 transitions. [2022-12-13 16:08:38,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4808259587020649 [2022-12-13 16:08:38,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1304 transitions. [2022-12-13 16:08:38,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1304 transitions. [2022-12-13 16:08:38,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:38,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1304 transitions. [2022-12-13 16:08:38,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.33333333333334) internal successors, (1304), 6 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,491 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 452.0) internal successors, (3164), 7 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,491 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1304 transitions. [2022-12-13 16:08:38,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 277 flow [2022-12-13 16:08:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 273 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:38,493 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2022-12-13 16:08:38,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2022-12-13 16:08:38,494 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2022-12-13 16:08:38,494 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2022-12-13 16:08:38,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:38,495 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-13 16:08:38,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:38,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:38,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:08:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1667874980, now seen corresponding path program 2 times [2022-12-13 16:08:38,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:38,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478443169] [2022-12-13 16:08:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:38,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478443169] [2022-12-13 16:08:38,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478443169] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:38,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591574392] [2022-12-13 16:08:38,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:08:38,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:38,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:38,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:08:38,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:08:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:08:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:38,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591574392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:38,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:38,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:08:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771381026] [2022-12-13 16:08:38,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:38,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:08:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:08:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:08:38,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 452 [2022-12-13 16:08:38,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 208.30769230769232) internal successors, (2708), 13 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:38,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 452 [2022-12-13 16:08:38,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:39,204 INFO L130 PetriNetUnfolder]: 664/1353 cut-off events. [2022-12-13 16:08:39,204 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 16:08:39,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 1353 events. 664/1353 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7360 event pairs, 544 based on Foata normal form. 6/1136 useless extension candidates. Maximal degree in co-relation 2571. Up to 1225 conditions per place. [2022-12-13 16:08:39,208 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 54 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2022-12-13 16:08:39,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 345 flow [2022-12-13 16:08:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:08:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:08:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2555 transitions. [2022-12-13 16:08:39,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4710545722713864 [2022-12-13 16:08:39,213 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2555 transitions. [2022-12-13 16:08:39,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2555 transitions. [2022-12-13 16:08:39,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:39,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2555 transitions. [2022-12-13 16:08:39,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 212.91666666666666) internal successors, (2555), 12 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 452.0) internal successors, (5876), 13 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,225 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 452.0) internal successors, (5876), 13 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,225 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2555 transitions. [2022-12-13 16:08:39,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 345 flow [2022-12-13 16:08:39,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 331 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:39,227 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2022-12-13 16:08:39,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2022-12-13 16:08:39,227 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2022-12-13 16:08:39,227 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2022-12-13 16:08:39,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.30769230769232) internal successors, (2708), 13 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:39,228 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 16:08:39,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:08:39,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 16:08:39,429 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-13 16:08:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2129128700, now seen corresponding path program 3 times [2022-12-13 16:08:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705038946] [2022-12-13 16:08:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:08:39,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:08:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:08:39,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:08:39,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:08:39,494 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 16:08:39,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 16:08:39,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 16:08:39,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 16:08:39,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 16:08:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:08:39,497 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2022-12-13 16:08:39,499 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:08:39,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 16:08:39,530 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:08:39,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,609 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-12-13 16:08:39,610 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:08:39,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3246 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-12-13 16:08:39,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:08:39,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-12-13 16:08:39,679 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-12-13 16:08:39,680 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 16:08:39,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3246 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-12-13 16:08:39,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 52824 [2022-12-13 16:08:42,121 INFO L134 LiptonReduction]: Checked pairs total: 90016 [2022-12-13 16:08:42,121 INFO L136 LiptonReduction]: Total number of compositions: 255 [2022-12-13 16:08:42,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:08:42,124 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;@76a3c60c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:08:42,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 16:08:42,126 INFO L130 PetriNetUnfolder]: 9/34 cut-off events. [2022-12-13 16:08:42,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:08:42,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:42,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:42,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash -326645075, now seen corresponding path program 1 times [2022-12-13 16:08:42,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:42,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294315881] [2022-12-13 16:08:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:42,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:42,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294315881] [2022-12-13 16:08:42,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294315881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:42,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:42,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:08:42,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746351988] [2022-12-13 16:08:42,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:42,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 583 [2022-12-13 16:08:42,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:42,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:42,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 583 [2022-12-13 16:08:42,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:44,100 INFO L130 PetriNetUnfolder]: 21831/33866 cut-off events. [2022-12-13 16:08:44,100 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-12-13 16:08:44,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64817 conditions, 33866 events. 21831/33866 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 239536 event pairs, 18796 based on Foata normal form. 5771/33725 useless extension candidates. Maximal degree in co-relation 26344. Up to 30841 conditions per place. [2022-12-13 16:08:44,248 INFO L137 encePairwiseOnDemand]: 540/583 looper letters, 75 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2022-12-13 16:08:44,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 358 flow [2022-12-13 16:08:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-12-13 16:08:44,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5237278444825615 [2022-12-13 16:08:44,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-12-13 16:08:44,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-12-13 16:08:44,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:44,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-12-13 16:08:44,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,255 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 916 transitions. [2022-12-13 16:08:44,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 358 flow [2022-12-13 16:08:44,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:44,257 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2022-12-13 16:08:44,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2022-12-13 16:08:44,258 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2022-12-13 16:08:44,258 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2022-12-13 16:08:44,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:44,258 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:08:44,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1743563000, now seen corresponding path program 1 times [2022-12-13 16:08:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:44,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782196984] [2022-12-13 16:08:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:44,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782196984] [2022-12-13 16:08:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782196984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549564982] [2022-12-13 16:08:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:44,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:44,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:44,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:08:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:08:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:08:44,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:08:44,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549564982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:44,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:08:44,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:08:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091605487] [2022-12-13 16:08:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:44,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 583 [2022-12-13 16:08:44,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:44,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 583 [2022-12-13 16:08:44,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:46,198 INFO L130 PetriNetUnfolder]: 21474/33713 cut-off events. [2022-12-13 16:08:46,198 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 16:08:46,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64663 conditions, 33713 events. 21474/33713 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 245638 event pairs, 8970 based on Foata normal form. 0/27751 useless extension candidates. Maximal degree in co-relation 64650. Up to 30791 conditions per place. [2022-12-13 16:08:46,304 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 95 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2022-12-13 16:08:46,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 113 transitions, 448 flow [2022-12-13 16:08:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-12-13 16:08:46,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5117209834190967 [2022-12-13 16:08:46,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-12-13 16:08:46,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-12-13 16:08:46,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:46,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-12-13 16:08:46,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:46,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:46,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 583.0) internal successors, (2332), 4 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:46,310 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 895 transitions. [2022-12-13 16:08:46,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 113 transitions, 448 flow [2022-12-13 16:08:46,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 113 transitions, 444 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:46,312 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2022-12-13 16:08:46,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2022-12-13 16:08:46,313 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2022-12-13 16:08:46,313 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2022-12-13 16:08:46,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:46,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:46,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:46,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:08:46,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:46,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1178001613, now seen corresponding path program 1 times [2022-12-13 16:08:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828218683] [2022-12-13 16:08:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:46,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:46,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828218683] [2022-12-13 16:08:46,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828218683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:46,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369162426] [2022-12-13 16:08:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:46,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:46,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:46,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:08:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:08:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:46,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:46,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369162426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:46,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:08:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650516362] [2022-12-13 16:08:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:46,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:08:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:08:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:08:46,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 583 [2022-12-13 16:08:46,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 267.14285714285717) internal successors, (1870), 7 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:46,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:46,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 583 [2022-12-13 16:08:46,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:48,928 INFO L130 PetriNetUnfolder]: 21923/33774 cut-off events. [2022-12-13 16:08:48,928 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2022-12-13 16:08:48,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65338 conditions, 33774 events. 21923/33774 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 237004 event pairs, 18796 based on Foata normal form. 3/28108 useless extension candidates. Maximal degree in co-relation 65310. Up to 30811 conditions per place. [2022-12-13 16:08:49,049 INFO L137 encePairwiseOnDemand]: 580/583 looper letters, 76 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2022-12-13 16:08:49,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 396 flow [2022-12-13 16:08:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:08:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:08:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2022-12-13 16:08:49,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.478273299028016 [2022-12-13 16:08:49,052 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2022-12-13 16:08:49,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2022-12-13 16:08:49,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:49,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2022-12-13 16:08:49,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,059 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1673 transitions. [2022-12-13 16:08:49,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 396 flow [2022-12-13 16:08:49,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:49,062 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2022-12-13 16:08:49,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-12-13 16:08:49,063 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2022-12-13 16:08:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2022-12-13 16:08:49,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 267.14285714285717) internal successors, (1870), 7 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:49,064 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:49,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:08:49,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:49,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1310029154, now seen corresponding path program 2 times [2022-12-13 16:08:49,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:49,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135167909] [2022-12-13 16:08:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:49,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:49,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135167909] [2022-12-13 16:08:49,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135167909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953217639] [2022-12-13 16:08:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:08:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:49,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:49,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:08:49,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:08:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:08:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:49,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:08:49,474 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:08:49,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:08:49,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 16:08:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:08:49,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:08:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953217639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:08:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:08:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844616102] [2022-12-13 16:08:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:49,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:08:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:08:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:08:49,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 583 [2022-12-13 16:08:49,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:49,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 583 [2022-12-13 16:08:49,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:52,450 INFO L130 PetriNetUnfolder]: 28344/44177 cut-off events. [2022-12-13 16:08:52,450 INFO L131 PetriNetUnfolder]: For 1078/1078 co-relation queries the response was YES. [2022-12-13 16:08:52,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86468 conditions, 44177 events. 28344/44177 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 335367 event pairs, 3992 based on Foata normal form. 0/36547 useless extension candidates. Maximal degree in co-relation 86432. Up to 30508 conditions per place. [2022-12-13 16:08:52,629 INFO L137 encePairwiseOnDemand]: 573/583 looper letters, 201 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2022-12-13 16:08:52,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 233 transitions, 996 flow [2022-12-13 16:08:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:08:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:08:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1732 transitions. [2022-12-13 16:08:52,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49514008004574045 [2022-12-13 16:08:52,633 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1732 transitions. [2022-12-13 16:08:52,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1732 transitions. [2022-12-13 16:08:52,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:52,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1732 transitions. [2022-12-13 16:08:52,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.6666666666667) internal successors, (1732), 6 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:52,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:52,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 583.0) internal successors, (4081), 7 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:52,641 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1732 transitions. [2022-12-13 16:08:52,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 233 transitions, 996 flow [2022-12-13 16:08:52,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 233 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:52,645 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2022-12-13 16:08:52,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2022-12-13 16:08:52,645 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2022-12-13 16:08:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2022-12-13 16:08:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 254.66666666666666) internal successors, (1528), 6 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:52,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:52,646 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:52,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:08:52,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:52,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1085926314, now seen corresponding path program 1 times [2022-12-13 16:08:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548324661] [2022-12-13 16:08:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:08:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548324661] [2022-12-13 16:08:52,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548324661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095162098] [2022-12-13 16:08:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:52,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:52,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:08:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:08:52,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:08:53,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:08:53,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095162098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:53,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:53,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-12-13 16:08:53,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632031917] [2022-12-13 16:08:53,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:53,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:08:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:08:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:08:53,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 583 [2022-12-13 16:08:53,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 263.85714285714283) internal successors, (3694), 14 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:53,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:53,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 583 [2022-12-13 16:08:53,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:56,595 INFO L130 PetriNetUnfolder]: 28325/44201 cut-off events. [2022-12-13 16:08:56,596 INFO L131 PetriNetUnfolder]: For 7657/7657 co-relation queries the response was YES. [2022-12-13 16:08:56,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95135 conditions, 44201 events. 28325/44201 cut-off events. For 7657/7657 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 337119 event pairs, 358 based on Foata normal form. 36/39026 useless extension candidates. Maximal degree in co-relation 95076. Up to 40116 conditions per place. [2022-12-13 16:08:56,793 INFO L137 encePairwiseOnDemand]: 578/583 looper letters, 147 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2022-12-13 16:08:56,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 865 flow [2022-12-13 16:08:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:08:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 16:08:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3816 transitions. [2022-12-13 16:08:56,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2022-12-13 16:08:56,798 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3816 transitions. [2022-12-13 16:08:56,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3816 transitions. [2022-12-13 16:08:56,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:56,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3816 transitions. [2022-12-13 16:08:56,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.57142857142856) internal successors, (3816), 14 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 583.0) internal successors, (8745), 15 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,811 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3816 transitions. [2022-12-13 16:08:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 865 flow [2022-12-13 16:08:56,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 865 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:56,827 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2022-12-13 16:08:56,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=583, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2022-12-13 16:08:56,828 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2022-12-13 16:08:56,828 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2022-12-13 16:08:56,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 263.85714285714283) internal successors, (3694), 14 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:56,829 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:08:56,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:57,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-13 16:08:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1835665514, now seen corresponding path program 1 times [2022-12-13 16:08:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:57,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966981339] [2022-12-13 16:08:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:08:57,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:08:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:08:57,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:08:57,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 16:08:57,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 16:08:57,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:08:57,094 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-12-13 16:08:57,094 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:08:57,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 16:08:57,121 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:08:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,239 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-12-13 16:08:57,240 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 16:08:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4916 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-12-13 16:08:57,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,251 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:08:57,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-12-13 16:08:57,337 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-12-13 16:08:57,337 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 16:08:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4916 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-12-13 16:08:57,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 94998 [2022-12-13 16:09:00,103 INFO L134 LiptonReduction]: Checked pairs total: 160583 [2022-12-13 16:09:00,103 INFO L136 LiptonReduction]: Total number of compositions: 313 [2022-12-13 16:09:00,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:09:00,105 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;@76a3c60c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:09:00,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 16:09:00,107 INFO L130 PetriNetUnfolder]: 12/40 cut-off events. [2022-12-13 16:09:00,108 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:09:00,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:00,108 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:09:00,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:09:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1365953914, now seen corresponding path program 1 times [2022-12-13 16:09:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:00,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825584744] [2022-12-13 16:09:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825584744] [2022-12-13 16:09:00,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825584744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:00,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:00,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:09:00,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384325] [2022-12-13 16:09:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:00,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:00,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:00,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 714 [2022-12-13 16:09:00,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:00,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:00,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 714 [2022-12-13 16:09:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:40,654 INFO L130 PetriNetUnfolder]: 548664/740447 cut-off events. [2022-12-13 16:09:40,654 INFO L131 PetriNetUnfolder]: For 4353/4353 co-relation queries the response was YES. [2022-12-13 16:09:41,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446493 conditions, 740447 events. 548664/740447 cut-off events. For 4353/4353 co-relation queries the response was YES. Maximal size of possible extension queue 15872. Compared 5628505 event pairs, 488120 based on Foata normal form. 130706/738987 useless extension candidates. Maximal degree in co-relation 168606. Up to 703677 conditions per place. [2022-12-13 16:09:43,912 INFO L137 encePairwiseOnDemand]: 660/714 looper letters, 94 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2022-12-13 16:09:43,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 452 flow [2022-12-13 16:09:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:09:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1120 transitions. [2022-12-13 16:09:43,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2022-12-13 16:09:43,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1120 transitions. [2022-12-13 16:09:43,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1120 transitions. [2022-12-13 16:09:43,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:43,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1120 transitions. [2022-12-13 16:09:43,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:43,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:43,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:43,921 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1120 transitions. [2022-12-13 16:09:43,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 452 flow [2022-12-13 16:09:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 452 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:09:43,924 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2022-12-13 16:09:43,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2022-12-13 16:09:43,925 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2022-12-13 16:09:43,925 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2022-12-13 16:09:43,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:43,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:43,926 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:09:43,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:09:43,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:09:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash -888483533, now seen corresponding path program 1 times [2022-12-13 16:09:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:43,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563875480] [2022-12-13 16:09:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:09:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563875480] [2022-12-13 16:09:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563875480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134657936] [2022-12-13 16:09:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:43,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:43,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:09:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:09:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:09:44,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:09:44,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134657936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:44,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:09:44,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:09:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756548706] [2022-12-13 16:09:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:44,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 714 [2022-12-13 16:09:44,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:44,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:44,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 714 [2022-12-13 16:09:44,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:10:24,474 INFO L130 PetriNetUnfolder]: 548885/742052 cut-off events. [2022-12-13 16:10:24,474 INFO L131 PetriNetUnfolder]: For 4100/4100 co-relation queries the response was YES. [2022-12-13 16:10:25,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448180 conditions, 742052 events. 548885/742052 cut-off events. For 4100/4100 co-relation queries the response was YES. Maximal size of possible extension queue 15940. Compared 5655857 event pairs, 320792 based on Foata normal form. 0/609649 useless extension candidates. Maximal degree in co-relation 1448166. Up to 703628 conditions per place. [2022-12-13 16:10:27,706 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 113 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2022-12-13 16:10:27,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 134 transitions, 538 flow [2022-12-13 16:10:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:10:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:10:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1087 transitions. [2022-12-13 16:10:27,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.507469654528478 [2022-12-13 16:10:27,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1087 transitions. [2022-12-13 16:10:27,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1087 transitions. [2022-12-13 16:10:27,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:10:27,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1087 transitions. [2022-12-13 16:10:27,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:27,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:27,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:27,713 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1087 transitions. [2022-12-13 16:10:27,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 134 transitions, 538 flow [2022-12-13 16:10:27,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 134 transitions, 534 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:10:27,717 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2022-12-13 16:10:27,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2022-12-13 16:10:27,717 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2022-12-13 16:10:27,717 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2022-12-13 16:10:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:27,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:10:27,718 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:10:27,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:10:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:27,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:10:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash -709437533, now seen corresponding path program 1 times [2022-12-13 16:10:27,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:27,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155924003] [2022-12-13 16:10:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:27,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:10:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:27,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155924003] [2022-12-13 16:10:27,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155924003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:10:27,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621175316] [2022-12-13 16:10:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:10:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:10:27,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:10:27,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:10:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:10:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:10:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:10:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:10:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:10:28,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621175316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:10:28,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:10:28,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:10:28,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724821670] [2022-12-13 16:10:28,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:10:28,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:10:28,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:10:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:10:28,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 714 [2022-12-13 16:10:28,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:28,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:10:28,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 714 [2022-12-13 16:10:28,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:11:09,841 INFO L130 PetriNetUnfolder]: 552694/744307 cut-off events. [2022-12-13 16:11:09,841 INFO L131 PetriNetUnfolder]: For 14393/14393 co-relation queries the response was YES. [2022-12-13 16:11:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460723 conditions, 744307 events. 552694/744307 cut-off events. For 14393/14393 co-relation queries the response was YES. Maximal size of possible extension queue 15916. Compared 5613993 event pairs, 488120 based on Foata normal form. 3/616656 useless extension candidates. Maximal degree in co-relation 1460694. Up to 703647 conditions per place. [2022-12-13 16:11:13,240 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 95 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2022-12-13 16:11:13,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 490 flow [2022-12-13 16:11:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:11:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:11:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2040 transitions. [2022-12-13 16:11:13,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-13 16:11:13,244 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2040 transitions. [2022-12-13 16:11:13,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2040 transitions. [2022-12-13 16:11:13,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:11:13,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2040 transitions. [2022-12-13 16:11:13,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 340.0) internal successors, (2040), 6 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:13,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:13,250 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:13,250 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 278 flow. Second operand 6 states and 2040 transitions. [2022-12-13 16:11:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 490 flow [2022-12-13 16:11:13,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:11:13,258 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 312 flow [2022-12-13 16:11:13,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2022-12-13 16:11:13,259 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 12 predicate places. [2022-12-13 16:11:13,259 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 312 flow [2022-12-13 16:11:13,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:13,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:11:13,260 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:11:13,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 16:11:13,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:11:13,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:11:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash -649793449, now seen corresponding path program 2 times [2022-12-13 16:11:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362251300] [2022-12-13 16:11:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:11:13,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362251300] [2022-12-13 16:11:13,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362251300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:11:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774348205] [2022-12-13 16:11:13,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:11:13,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:11:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:11:13,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:11:13,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:11:13,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:11:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:11:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:11:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:11:13,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:11:13,626 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:11:13,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:11:13,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 16:11:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:11:13,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:11:13,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774348205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:13,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:11:13,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:11:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669438372] [2022-12-13 16:11:13,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:13,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:11:13,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:11:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:11:13,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 714 [2022-12-13 16:11:13,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:13,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:11:13,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 714 [2022-12-13 16:11:13,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:12:05,994 INFO L130 PetriNetUnfolder]: 658076/903049 cut-off events. [2022-12-13 16:12:05,994 INFO L131 PetriNetUnfolder]: For 18769/18769 co-relation queries the response was YES. [2022-12-13 16:12:07,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773164 conditions, 903049 events. 658076/903049 cut-off events. For 18769/18769 co-relation queries the response was YES. Maximal size of possible extension queue 20684. Compared 7381827 event pairs, 112334 based on Foata normal form. 0/747392 useless extension candidates. Maximal degree in co-relation 1773127. Up to 692316 conditions per place. [2022-12-13 16:12:10,381 INFO L137 encePairwiseOnDemand]: 703/714 looper letters, 270 selfloop transitions, 20 changer transitions 0/309 dead transitions. [2022-12-13 16:12:10,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 309 transitions, 1326 flow [2022-12-13 16:12:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:12:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:12:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2141 transitions. [2022-12-13 16:12:10,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49976657329598506 [2022-12-13 16:12:10,385 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2141 transitions. [2022-12-13 16:12:10,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2141 transitions. [2022-12-13 16:12:10,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:12:10,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2141 transitions. [2022-12-13 16:12:10,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 356.8333333333333) internal successors, (2141), 6 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:10,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:10,395 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:10,395 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 312 flow. Second operand 6 states and 2141 transitions. [2022-12-13 16:12:10,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 309 transitions, 1326 flow [2022-12-13 16:12:10,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 309 transitions, 1312 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:12:10,419 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 423 flow [2022-12-13 16:12:10,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2022-12-13 16:12:10,420 INFO L288 CegarLoopForPetriNet]: 108 programPoint places, 20 predicate places. [2022-12-13 16:12:10,420 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 423 flow [2022-12-13 16:12:10,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.5) internal successors, (1863), 6 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:10,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:12:10,420 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:12:10,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 16:12:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:12:10,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 16:12:10,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash 69766838, now seen corresponding path program 1 times [2022-12-13 16:12:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656500178] [2022-12-13 16:12:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:12:10,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656500178] [2022-12-13 16:12:10,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656500178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:12:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838501110] [2022-12-13 16:12:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:10,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:12:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:12:10,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:12:10,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a211e4-7054-4d10-8e5c-b67690714da7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:12:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:12:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:12:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:12:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:12:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:12:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838501110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:12:10,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:12:10,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-12-13 16:12:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305697679] [2022-12-13 16:12:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:12:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:12:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:12:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:12:10,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 714 [2022-12-13 16:12:10,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 423 flow. Second operand has 14 states, 14 states have (on average 321.85714285714283) internal successors, (4506), 14 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:10,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:12:10,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 714 [2022-12-13 16:12:10,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand