./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8 --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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- 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-e04fb08 [2022-11-16 11:14:02,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:14:02,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:14:02,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:14:02,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:14:02,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:14:02,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:14:02,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:14:02,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:14:02,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:14:02,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:14:02,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:14:02,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:14:02,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:14:02,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:14:02,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:14:02,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:14:02,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:14:02,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:14:02,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:14:02,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:14:02,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:14:02,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:14:02,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:14:02,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:14:02,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:14:02,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:14:02,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:14:02,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:14:02,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:14:02,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:14:02,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:14:02,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:14:02,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:14:02,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:14:02,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:14:02,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:14:02,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:14:02,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:14:02,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:14:02,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:14:02,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:14:02,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:14:02,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:14:02,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:14:02,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:14:02,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:14:02,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:14:02,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:14:02,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:14:02,730 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:14:02,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:14:02,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:14:02,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:14:02,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:14:02,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:14:02,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:14:02,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:14:02,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:14:02,733 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:14:02,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:14:02,733 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:14:02,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:14:02,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:14:02,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:14:02,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:14:02,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:02,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:14:02,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:14:02,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:14:02,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:14:02,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:14:02,737 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:14:02,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:14:02,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:14:02,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-11-16 11:14:03,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:14:03,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:14:03,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:14:03,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:14:03,289 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:14:03,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-16 11:14:03,408 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/data/f28a80639/615701fbd6e14bb1a1bc0bff476bea76/FLAG9a05a6d3c [2022-11-16 11:14:04,354 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:14:04,355 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-16 11:14:04,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/data/f28a80639/615701fbd6e14bb1a1bc0bff476bea76/FLAG9a05a6d3c [2022-11-16 11:14:04,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/data/f28a80639/615701fbd6e14bb1a1bc0bff476bea76 [2022-11-16 11:14:04,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:14:04,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:14:04,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:04,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:14:04,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:14:04,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:04" (1/1) ... [2022-11-16 11:14:04,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a407d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:04, skipping insertion in model container [2022-11-16 11:14:04,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:04" (1/1) ... [2022-11-16 11:14:04,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:14:04,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:14:05,420 WARN L229 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_1fe823e4-71be-41a2-937b-6745da1b3546/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-16 11:14:05,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:05,638 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:14:05,710 WARN L229 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_1fe823e4-71be-41a2-937b-6745da1b3546/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-16 11:14:05,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:05,825 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:14:05,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05 WrapperNode [2022-11-16 11:14:05,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:05,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:05,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:14:05,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:14:05,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:05,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:05,960 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-11-16 11:14:05,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:05,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:14:05,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:14:05,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:14:05,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:05,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:14:06,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:14:06,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:14:06,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:14:06,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (1/1) ... [2022-11-16 11:14:06,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:06,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:14:06,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:14:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:14:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:14:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-16 11:14:06,206 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-16 11:14:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:14:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:14:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-16 11:14:06,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-16 11:14:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:14:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:14:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:14:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:14:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:14:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:14:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:14:06,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:14:06,214 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:14:06,506 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:14:06,509 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:14:07,115 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:14:07,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:14:07,129 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-16 11:14:07,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:07 BoogieIcfgContainer [2022-11-16 11:14:07,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:14:07,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:14:07,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:14:07,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:14:07,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:14:04" (1/3) ... [2022-11-16 11:14:07,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511d7130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:07, skipping insertion in model container [2022-11-16 11:14:07,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:05" (2/3) ... [2022-11-16 11:14:07,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511d7130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:07, skipping insertion in model container [2022-11-16 11:14:07,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:07" (3/3) ... [2022-11-16 11:14:07,163 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-11-16 11:14:07,184 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:14:07,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:14:07,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:14:07,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:14:07,468 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:14:07,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 498 flow [2022-11-16 11:14:07,873 INFO L130 PetriNetUnfolder]: 54/440 cut-off events. [2022-11-16 11:14:07,874 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-16 11:14:07,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 440 events. 54/440 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1753 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2022-11-16 11:14:07,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 498 flow [2022-11-16 11:14:07,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 236 transitions, 488 flow [2022-11-16 11:14:07,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:14:07,979 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;@4c16a955, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:14:07,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 11:14:08,010 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2022-11-16 11:14:08,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:14:08,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:08,013 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:08,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash 826857823, now seen corresponding path program 1 times [2022-11-16 11:14:08,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:08,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807301974] [2022-11-16 11:14:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:08,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:08,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807301974] [2022-11-16 11:14:08,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807301974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:08,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:08,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:14:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981783455] [2022-11-16 11:14:08,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:08,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:14:08,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:14:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:14:08,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 238 [2022-11-16 11:14:08,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 236 transitions, 488 flow. Second operand has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:08,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:08,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 238 [2022-11-16 11:14:08,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:08,783 INFO L130 PetriNetUnfolder]: 11/387 cut-off events. [2022-11-16 11:14:08,783 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-16 11:14:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 387 events. 11/387 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1466 event pairs, 0 based on Foata normal form. 55/417 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2022-11-16 11:14:08,792 INFO L137 encePairwiseOnDemand]: 221/238 looper letters, 4 selfloop transitions, 0 changer transitions 0/218 dead transitions. [2022-11-16 11:14:08,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 218 transitions, 460 flow [2022-11-16 11:14:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:14:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:14:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 449 transitions. [2022-11-16 11:14:08,826 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9432773109243697 [2022-11-16 11:14:08,827 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 449 transitions. [2022-11-16 11:14:08,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 449 transitions. [2022-11-16 11:14:08,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:08,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 449 transitions. [2022-11-16 11:14:08,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:08,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:08,853 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:08,856 INFO L175 Difference]: Start difference. First operand has 218 places, 236 transitions, 488 flow. Second operand 2 states and 449 transitions. [2022-11-16 11:14:08,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 218 transitions, 460 flow [2022-11-16 11:14:08,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 218 transitions, 460 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:14:08,869 INFO L231 Difference]: Finished difference. Result has 218 places, 218 transitions, 452 flow [2022-11-16 11:14:08,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=452, PETRI_PLACES=218, PETRI_TRANSITIONS=218} [2022-11-16 11:14:08,877 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 0 predicate places. [2022-11-16 11:14:08,878 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 218 transitions, 452 flow [2022-11-16 11:14:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:08,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:08,879 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:14:08,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -170214530, now seen corresponding path program 1 times [2022-11-16 11:14:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106181990] [2022-11-16 11:14:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:09,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106181990] [2022-11-16 11:14:09,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106181990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:09,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:09,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:14:09,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536539357] [2022-11-16 11:14:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:09,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:14:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:14:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:14:09,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 238 [2022-11-16 11:14:09,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 218 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:09,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:09,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 238 [2022-11-16 11:14:09,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:09,355 INFO L130 PetriNetUnfolder]: 11/402 cut-off events. [2022-11-16 11:14:09,355 INFO L131 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-11-16 11:14:09,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 402 events. 11/402 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1456 event pairs, 0 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 435. Up to 16 conditions per place. [2022-11-16 11:14:09,362 INFO L137 encePairwiseOnDemand]: 235/238 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-11-16 11:14:09,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 223 transitions, 496 flow [2022-11-16 11:14:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:14:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:14:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-11-16 11:14:09,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8907563025210085 [2022-11-16 11:14:09,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-11-16 11:14:09,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-11-16 11:14:09,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:09,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-11-16 11:14:09,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:09,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:09,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:09,379 INFO L175 Difference]: Start difference. First operand has 218 places, 218 transitions, 452 flow. Second operand 3 states and 636 transitions. [2022-11-16 11:14:09,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 223 transitions, 496 flow [2022-11-16 11:14:09,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 223 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:14:09,395 INFO L231 Difference]: Finished difference. Result has 221 places, 219 transitions, 464 flow [2022-11-16 11:14:09,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=221, PETRI_TRANSITIONS=219} [2022-11-16 11:14:09,397 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 3 predicate places. [2022-11-16 11:14:09,397 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 219 transitions, 464 flow [2022-11-16 11:14:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:09,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:09,401 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:14:09,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2038246020, now seen corresponding path program 1 times [2022-11-16 11:14:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:09,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671513151] [2022-11-16 11:14:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671513151] [2022-11-16 11:14:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671513151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869001315] [2022-11-16 11:14:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:09,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:09,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:14:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:14:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869001315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:10,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:10,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-16 11:14:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951932907] [2022-11-16 11:14:10,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:14:10,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:10,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:14:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:14:10,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-16 11:14:10,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 219 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:10,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:10,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-16 11:14:10,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:10,653 INFO L130 PetriNetUnfolder]: 11/420 cut-off events. [2022-11-16 11:14:10,653 INFO L131 PetriNetUnfolder]: For 20/30 co-relation queries the response was YES. [2022-11-16 11:14:10,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 420 events. 11/420 cut-off events. For 20/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1386 event pairs, 0 based on Foata normal form. 2/398 useless extension candidates. Maximal degree in co-relation 468. Up to 12 conditions per place. [2022-11-16 11:14:10,659 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 17 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-11-16 11:14:10,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 231 transitions, 542 flow [2022-11-16 11:14:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:14:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:14:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-11-16 11:14:10,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8744164332399627 [2022-11-16 11:14:10,670 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-11-16 11:14:10,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-11-16 11:14:10,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:10,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-11-16 11:14:10,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:10,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:10,689 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:10,689 INFO L175 Difference]: Start difference. First operand has 221 places, 219 transitions, 464 flow. Second operand 9 states and 1873 transitions. [2022-11-16 11:14:10,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 231 transitions, 542 flow [2022-11-16 11:14:10,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 231 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:14:10,698 INFO L231 Difference]: Finished difference. Result has 231 places, 225 transitions, 512 flow [2022-11-16 11:14:10,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=512, PETRI_PLACES=231, PETRI_TRANSITIONS=225} [2022-11-16 11:14:10,712 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 13 predicate places. [2022-11-16 11:14:10,712 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 225 transitions, 512 flow [2022-11-16 11:14:10,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:10,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:10,716 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:10,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:14:10,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:10,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:10,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1148441976, now seen corresponding path program 2 times [2022-11-16 11:14:10,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:10,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160104257] [2022-11-16 11:14:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:10,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160104257] [2022-11-16 11:14:11,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160104257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724376742] [2022-11-16 11:14:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:14:11,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:11,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:11,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:14:11,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:14:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:14:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:12,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724376742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:12,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:12,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 11:14:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146418485] [2022-11-16 11:14:12,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:12,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:14:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:14:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:14:12,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-16 11:14:12,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 225 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:12,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:12,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-16 11:14:12,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:12,813 INFO L130 PetriNetUnfolder]: 11/484 cut-off events. [2022-11-16 11:14:12,813 INFO L131 PetriNetUnfolder]: For 40/50 co-relation queries the response was YES. [2022-11-16 11:14:12,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 484 events. 11/484 cut-off events. For 40/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1390 event pairs, 0 based on Foata normal form. 4/464 useless extension candidates. Maximal degree in co-relation 603. Up to 12 conditions per place. [2022-11-16 11:14:12,820 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 29 selfloop transitions, 21 changer transitions 0/255 dead transitions. [2022-11-16 11:14:12,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 255 transitions, 732 flow [2022-11-16 11:14:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:14:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:14:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4359 transitions. [2022-11-16 11:14:12,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8721488595438175 [2022-11-16 11:14:12,834 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4359 transitions. [2022-11-16 11:14:12,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4359 transitions. [2022-11-16 11:14:12,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:12,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4359 transitions. [2022-11-16 11:14:12,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 207.57142857142858) internal successors, (4359), 21 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:12,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:12,873 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:12,873 INFO L175 Difference]: Start difference. First operand has 231 places, 225 transitions, 512 flow. Second operand 21 states and 4359 transitions. [2022-11-16 11:14:12,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 255 transitions, 732 flow [2022-11-16 11:14:12,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 255 transitions, 718 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 11:14:12,886 INFO L231 Difference]: Finished difference. Result has 255 places, 238 transitions, 636 flow [2022-11-16 11:14:12,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=636, PETRI_PLACES=255, PETRI_TRANSITIONS=238} [2022-11-16 11:14:12,889 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 37 predicate places. [2022-11-16 11:14:12,890 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 238 transitions, 636 flow [2022-11-16 11:14:12,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:12,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:12,893 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:12,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:13,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:13,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:14:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2047277712, now seen corresponding path program 3 times [2022-11-16 11:14:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653421210] [2022-11-16 11:14:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:13,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:14,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:14,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653421210] [2022-11-16 11:14:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653421210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234461050] [2022-11-16 11:14:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:14:14,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:14,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:14,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:16:02,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-16 11:16:02,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:16:02,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:16:02,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:16:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234461050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:03,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:03,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-16 11:16:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754825076] [2022-11-16 11:16:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:03,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:16:03,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:16:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:16:03,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-16 11:16:03,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 238 transitions, 636 flow. Second operand has 34 states, 34 states have (on average 207.8235294117647) internal successors, (7066), 34 states have internal predecessors, (7066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:03,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:16:03,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-16 11:16:03,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:16:04,523 INFO L130 PetriNetUnfolder]: 11/612 cut-off events. [2022-11-16 11:16:04,523 INFO L131 PetriNetUnfolder]: For 248/258 co-relation queries the response was YES. [2022-11-16 11:16:04,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 612 events. 11/612 cut-off events. For 248/258 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1387 event pairs, 0 based on Foata normal form. 8/596 useless extension candidates. Maximal degree in co-relation 905. Up to 27 conditions per place. [2022-11-16 11:16:04,528 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 53 selfloop transitions, 45 changer transitions 0/303 dead transitions. [2022-11-16 11:16:04,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 303 transitions, 1176 flow [2022-11-16 11:16:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:16:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-16 11:16:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 9331 transitions. [2022-11-16 11:16:04,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8712418300653595 [2022-11-16 11:16:04,548 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 9331 transitions. [2022-11-16 11:16:04,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 9331 transitions. [2022-11-16 11:16:04,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:16:04,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 9331 transitions. [2022-11-16 11:16:04,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 207.35555555555555) internal successors, (9331), 45 states have internal predecessors, (9331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:04,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 238.0) internal successors, (10948), 46 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:04,617 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 238.0) internal successors, (10948), 46 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:04,617 INFO L175 Difference]: Start difference. First operand has 255 places, 238 transitions, 636 flow. Second operand 45 states and 9331 transitions. [2022-11-16 11:16:04,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 303 transitions, 1176 flow [2022-11-16 11:16:04,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 303 transitions, 1136 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-16 11:16:04,630 INFO L231 Difference]: Finished difference. Result has 302 places, 263 transitions, 914 flow [2022-11-16 11:16:04,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=914, PETRI_PLACES=302, PETRI_TRANSITIONS=263} [2022-11-16 11:16:04,634 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 84 predicate places. [2022-11-16 11:16:04,634 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 263 transitions, 914 flow [2022-11-16 11:16:04,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 207.8235294117647) internal successors, (7066), 34 states have internal predecessors, (7066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:04,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:16:04,637 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:04,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:04,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:04,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:16:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 948970848, now seen corresponding path program 4 times [2022-11-16 11:16:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339452068] [2022-11-16 11:16:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 0 proven. 1695 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:16:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339452068] [2022-11-16 11:16:07,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339452068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750439311] [2022-11-16 11:16:07,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:16:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:07,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:07,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:07,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:23:01,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:23:01,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:01,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:23:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 0 proven. 1695 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:23:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 0 proven. 1695 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:23:04,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750439311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:04,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:04,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-16 11:23:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814982605] [2022-11-16 11:23:04,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:23:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:23:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:23:04,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-16 11:23:04,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 263 transitions, 914 flow. Second operand has 66 states, 66 states have (on average 207.9090909090909) internal successors, (13722), 66 states have internal predecessors, (13722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:04,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:04,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-16 11:23:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:07,036 INFO L130 PetriNetUnfolder]: 11/868 cut-off events. [2022-11-16 11:23:07,036 INFO L131 PetriNetUnfolder]: For 2119/2129 co-relation queries the response was YES. [2022-11-16 11:23:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 868 events. 11/868 cut-off events. For 2119/2129 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1385 event pairs, 0 based on Foata normal form. 16/860 useless extension candidates. Maximal degree in co-relation 1582. Up to 58 conditions per place. [2022-11-16 11:23:07,043 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 101 selfloop transitions, 93 changer transitions 0/399 dead transitions. [2022-11-16 11:23:07,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 399 transitions, 2210 flow [2022-11-16 11:23:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-16 11:23:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-16 11:23:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 19275 transitions. [2022-11-16 11:23:07,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8708322038492816 [2022-11-16 11:23:07,083 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 19275 transitions. [2022-11-16 11:23:07,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 19275 transitions. [2022-11-16 11:23:07,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:07,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 19275 transitions. [2022-11-16 11:23:07,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 207.25806451612902) internal successors, (19275), 93 states have internal predecessors, (19275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:07,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 238.0) internal successors, (22372), 94 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:07,221 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 238.0) internal successors, (22372), 94 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:07,222 INFO L175 Difference]: Start difference. First operand has 302 places, 263 transitions, 914 flow. Second operand 93 states and 19275 transitions. [2022-11-16 11:23:07,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 399 transitions, 2210 flow [2022-11-16 11:23:07,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 399 transitions, 2122 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-16 11:23:07,240 INFO L231 Difference]: Finished difference. Result has 393 places, 312 transitions, 1548 flow [2022-11-16 11:23:07,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1548, PETRI_PLACES=393, PETRI_TRANSITIONS=312} [2022-11-16 11:23:07,244 INFO L288 CegarLoopForPetriNet]: 218 programPoint places, 175 predicate places. [2022-11-16 11:23:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 312 transitions, 1548 flow [2022-11-16 11:23:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 207.9090909090909) internal successors, (13722), 66 states have internal predecessors, (13722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:07,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:07,252 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:07,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:07,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:07,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:23:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 603022656, now seen corresponding path program 5 times [2022-11-16 11:23:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:07,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751718115] [2022-11-16 11:23:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:07,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 7471 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:23:14,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751718115] [2022-11-16 11:23:14,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751718115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537572990] [2022-11-16 11:23:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:23:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:14,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:14,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe823e4-71be-41a2-937b-6745da1b3546/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process