./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:37:45,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:37:45,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:37:45,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:37:45,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:37:45,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:37:45,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:37:45,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:37:45,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:37:45,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:37:45,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:37:45,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:37:45,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:37:45,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:37:45,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:37:45,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:37:45,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:37:45,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:37:45,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:37:45,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:37:45,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:37:45,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:37:45,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:37:45,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:37:45,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:37:45,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:37:45,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:37:45,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:37:45,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:37:45,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:37:45,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:37:45,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:37:45,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:37:45,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:37:45,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:37:45,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:37:45,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:37:45,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:37:45,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:37:45,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:37:45,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:37:45,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:37:45,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:37:45,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:37:45,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:37:45,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:37:45,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:37:45,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:37:45,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:37:45,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:37:45,428 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:37:45,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:37:45,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:37:45,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:37:45,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:37:45,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:37:45,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:37:45,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:37:45,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:37:45,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:37:45,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:37:45,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:37:45,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:37:45,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:37:45,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:37:45,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:37:45,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:37:45,433 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-12-13 16:37:45,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:37:45,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:37:45,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:37:45,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:37:45,613 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:37:45,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-12-13 16:37:48,124 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:37:48,339 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:37:48,340 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-12-13 16:37:48,352 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/data/9fd4cd784/8c519590c2114773a21e769450a0c533/FLAG16bea687b [2022-12-13 16:37:48,700 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/data/9fd4cd784/8c519590c2114773a21e769450a0c533 [2022-12-13 16:37:48,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:37:48,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:37:48,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:37:48,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:37:48,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:37:48,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:37:48" (1/1) ... [2022-12-13 16:37:48,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dc475f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:48, skipping insertion in model container [2022-12-13 16:37:48,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:37:48" (1/1) ... [2022-12-13 16:37:48,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:37:48,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:37:49,013 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-12-13 16:37:49,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:37:49,042 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:37:49,068 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-12-13 16:37:49,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:37:49,107 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:37:49,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49 WrapperNode [2022-12-13 16:37:49,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:37:49,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:37:49,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:37:49,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:37:49,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,141 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-12-13 16:37:49,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:37:49,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:37:49,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:37:49,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:37:49,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:37:49,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:37:49,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:37:49,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:37:49,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (1/1) ... [2022-12-13 16:37:49,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:37:49,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:49,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:37:49,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:37:49,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:37:49,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:37:49,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 16:37:49,224 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:37:49,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:37:49,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:37:49,226 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:37:49,327 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:37:49,329 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:37:49,538 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:37:49,544 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:37:49,544 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 16:37:49,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:37:49 BoogieIcfgContainer [2022-12-13 16:37:49,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:37:49,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:37:49,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:37:49,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:37:49,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:37:48" (1/3) ... [2022-12-13 16:37:49,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55642659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:37:49, skipping insertion in model container [2022-12-13 16:37:49,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:49" (2/3) ... [2022-12-13 16:37:49,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55642659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:37:49, skipping insertion in model container [2022-12-13 16:37:49,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:37:49" (3/3) ... [2022-12-13 16:37:49,552 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-12-13 16:37:49,558 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:37:49,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:37:49,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 16:37:49,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:37:49,615 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 16:37:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-12-13 16:37:49,724 INFO L130 PetriNetUnfolder]: 45/272 cut-off events. [2022-12-13 16:37:49,724 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 16:37:49,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 832 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-12-13 16:37:49,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-12-13 16:37:49,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-12-13 16:37:49,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:37:49,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 195 transitions, 395 flow [2022-12-13 16:37:49,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 195 transitions, 395 flow [2022-12-13 16:37:49,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 195 transitions, 395 flow [2022-12-13 16:37:49,780 INFO L130 PetriNetUnfolder]: 44/267 cut-off events. [2022-12-13 16:37:49,780 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:37:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 267 events. 44/267 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 789 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-12-13 16:37:49,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 11388 [2022-12-13 16:37:52,094 INFO L134 LiptonReduction]: Checked pairs total: 18305 [2022-12-13 16:37:52,094 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-12-13 16:37:52,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:37:52,109 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;@2d77d75e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:37:52,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 16:37:52,112 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2022-12-13 16:37:52,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:37:52,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:52,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:52,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:37:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2040123477, now seen corresponding path program 1 times [2022-12-13 16:37:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:52,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292439332] [2022-12-13 16:37:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:52,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292439332] [2022-12-13 16:37:52,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292439332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:52,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:52,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462324652] [2022-12-13 16:37:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:52,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:52,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-12-13 16:37:52,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:52,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-12-13 16:37:52,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:52,490 INFO L130 PetriNetUnfolder]: 286/626 cut-off events. [2022-12-13 16:37:52,490 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:37:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 626 events. 286/626 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3111 event pairs, 252 based on Foata normal form. 105/642 useless extension candidates. Maximal degree in co-relation 1135. Up to 558 conditions per place. [2022-12-13 16:37:52,495 INFO L137 encePairwiseOnDemand]: 346/371 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 16:37:52,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 169 flow [2022-12-13 16:37:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:37:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2022-12-13 16:37:52,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49865229110512127 [2022-12-13 16:37:52,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2022-12-13 16:37:52,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2022-12-13 16:37:52,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:52,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2022-12-13 16:37:52,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,525 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 555 transitions. [2022-12-13 16:37:52,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 169 flow [2022-12-13 16:37:52,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 169 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:37:52,528 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2022-12-13 16:37:52,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-12-13 16:37:52,533 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2022-12-13 16:37:52,534 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2022-12-13 16:37:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:52,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:52,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:37:52,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:37:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1608007837, now seen corresponding path program 1 times [2022-12-13 16:37:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208071646] [2022-12-13 16:37:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:52,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208071646] [2022-12-13 16:37:52,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208071646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652305116] [2022-12-13 16:37:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:52,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:52,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:52,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:52,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:37:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:37:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:37:52,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:37:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652305116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:52,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:37:52,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:37:52,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957315799] [2022-12-13 16:37:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:52,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:52,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:52,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-12-13 16:37:52,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:52,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-12-13 16:37:52,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:52,833 INFO L130 PetriNetUnfolder]: 269/606 cut-off events. [2022-12-13 16:37:52,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:37:52,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 606 events. 269/606 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3298 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1163. Up to 526 conditions per place. [2022-12-13 16:37:52,837 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2022-12-13 16:37:52,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 239 flow [2022-12-13 16:37:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:37:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2022-12-13 16:37:52,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4914645103324349 [2022-12-13 16:37:52,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2022-12-13 16:37:52,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2022-12-13 16:37:52,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:52,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2022-12-13 16:37:52,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,847 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 547 transitions. [2022-12-13 16:37:52,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 239 flow [2022-12-13 16:37:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 235 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:37:52,850 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2022-12-13 16:37:52,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-12-13 16:37:52,851 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2022-12-13 16:37:52,851 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2022-12-13 16:37:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:52,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:52,852 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:52,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:37:53,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 16:37:53,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:37:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1687710642, now seen corresponding path program 1 times [2022-12-13 16:37:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965343333] [2022-12-13 16:37:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:53,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965343333] [2022-12-13 16:37:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965343333] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842631548] [2022-12-13 16:37:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:53,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:53,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:53,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:53,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:37:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:37:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842631548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:53,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:53,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:37:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724768131] [2022-12-13 16:37:53,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:53,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:37:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:37:53,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:37:53,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-12-13 16:37:53,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:53,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-12-13 16:37:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:53,338 INFO L130 PetriNetUnfolder]: 285/604 cut-off events. [2022-12-13 16:37:53,338 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-12-13 16:37:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1211 conditions, 604 events. 285/604 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2951 event pairs, 252 based on Foata normal form. 3/536 useless extension candidates. Maximal degree in co-relation 1184. Up to 542 conditions per place. [2022-12-13 16:37:53,340 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 35 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2022-12-13 16:37:53,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 201 flow [2022-12-13 16:37:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:37:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:37:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1027 transitions. [2022-12-13 16:37:53,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613656783468104 [2022-12-13 16:37:53,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1027 transitions. [2022-12-13 16:37:53,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1027 transitions. [2022-12-13 16:37:53,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:53,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1027 transitions. [2022-12-13 16:37:53,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,348 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 1027 transitions. [2022-12-13 16:37:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 201 flow [2022-12-13 16:37:53,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:37:53,349 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2022-12-13 16:37:53,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-12-13 16:37:53,350 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2022-12-13 16:37:53,350 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2022-12-13 16:37:53,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:53,351 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-13 16:37:53,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 16:37:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:53,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:37:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash -14117504, now seen corresponding path program 2 times [2022-12-13 16:37:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:53,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024482106] [2022-12-13 16:37:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:53,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024482106] [2022-12-13 16:37:53,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024482106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410671965] [2022-12-13 16:37:53,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:37:53,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:53,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:53,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:53,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:37:53,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:37:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:37:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:37:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:37:53,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410671965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:53,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:53,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:37:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842347002] [2022-12-13 16:37:53,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:53,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:37:53,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:37:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:37:53,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-12-13 16:37:53,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:53,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:53,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-12-13 16:37:53,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:54,014 INFO L130 PetriNetUnfolder]: 285/610 cut-off events. [2022-12-13 16:37:54,014 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-12-13 16:37:54,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 610 events. 285/610 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2938 event pairs, 252 based on Foata normal form. 6/545 useless extension candidates. Maximal degree in co-relation 1175. Up to 542 conditions per place. [2022-12-13 16:37:54,017 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 35 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2022-12-13 16:37:54,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 269 flow [2022-12-13 16:37:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:37:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:37:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2020 transitions. [2022-12-13 16:37:54,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4537286612758311 [2022-12-13 16:37:54,020 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2020 transitions. [2022-12-13 16:37:54,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2020 transitions. [2022-12-13 16:37:54,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:54,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2020 transitions. [2022-12-13 16:37:54,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.33333333333334) internal successors, (2020), 12 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:54,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:54,030 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:54,030 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 2020 transitions. [2022-12-13 16:37:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 269 flow [2022-12-13 16:37:54,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:37:54,033 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2022-12-13 16:37:54,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2022-12-13 16:37:54,034 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2022-12-13 16:37:54,034 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2022-12-13 16:37:54,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:54,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:54,035 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 16:37:54,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:37:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:54,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:37:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1930786752, now seen corresponding path program 3 times [2022-12-13 16:37:54,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810350251] [2022-12-13 16:37:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:37:54,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:37:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:37:54,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:37:54,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:37:54,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 16:37:54,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 16:37:54,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 16:37:54,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 16:37:54,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:37:54,353 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-12-13 16:37:54,356 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:37:54,356 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 16:37:54,392 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:37:54,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,448 INFO L130 PetriNetUnfolder]: 75/444 cut-off events. [2022-12-13 16:37:54,448 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-12-13 16:37:54,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1724 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-12-13 16:37:54,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,453 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:37:54,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-12-13 16:37:54,487 INFO L130 PetriNetUnfolder]: 75/444 cut-off events. [2022-12-13 16:37:54,487 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-12-13 16:37:54,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1724 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-12-13 16:37:54,501 INFO L119 LiptonReduction]: Number of co-enabled transitions 35040 [2022-12-13 16:37:57,122 INFO L134 LiptonReduction]: Checked pairs total: 56817 [2022-12-13 16:37:57,122 INFO L136 LiptonReduction]: Total number of compositions: 228 [2022-12-13 16:37:57,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:37:57,125 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;@2d77d75e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:37:57,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 16:37:57,128 INFO L130 PetriNetUnfolder]: 8/28 cut-off events. [2022-12-13 16:37:57,128 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:37:57,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:57,128 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:57,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:37:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2042302456, now seen corresponding path program 1 times [2022-12-13 16:37:57,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:57,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073599793] [2022-12-13 16:37:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:57,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:57,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073599793] [2022-12-13 16:37:57,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073599793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:57,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:57,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694981968] [2022-12-13 16:37:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:57,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:57,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 503 [2022-12-13 16:37:57,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:57,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:57,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 503 [2022-12-13 16:37:57,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:58,199 INFO L130 PetriNetUnfolder]: 9235/14978 cut-off events. [2022-12-13 16:37:58,199 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-12-13 16:37:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 14978 events. 9235/14978 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 101706 event pairs, 8526 based on Foata normal form. 2881/15496 useless extension candidates. Maximal degree in co-relation 10490. Up to 13441 conditions per place. [2022-12-13 16:37:58,253 INFO L137 encePairwiseOnDemand]: 469/503 looper letters, 54 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-12-13 16:37:58,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 270 flow [2022-12-13 16:37:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:37:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2022-12-13 16:37:58,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5056328694499669 [2022-12-13 16:37:58,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2022-12-13 16:37:58,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2022-12-13 16:37:58,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:58,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2022-12-13 16:37:58,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:58,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:58,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:58,261 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 763 transitions. [2022-12-13 16:37:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 270 flow [2022-12-13 16:37:58,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:37:58,264 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2022-12-13 16:37:58,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-12-13 16:37:58,265 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-12-13 16:37:58,265 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2022-12-13 16:37:58,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:58,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:58,265 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:58,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:37:58,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:37:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1992107039, now seen corresponding path program 1 times [2022-12-13 16:37:58,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:58,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256449033] [2022-12-13 16:37:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:58,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256449033] [2022-12-13 16:37:58,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256449033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704789405] [2022-12-13 16:37:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:58,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:58,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:58,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:58,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:37:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:37:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:37:58,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:37:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704789405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:58,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:37:58,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:37:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819229720] [2022-12-13 16:37:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:58,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 503 [2022-12-13 16:37:58,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:58,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:58,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 503 [2022-12-13 16:37:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:37:59,301 INFO L130 PetriNetUnfolder]: 9353/14978 cut-off events. [2022-12-13 16:37:59,301 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-12-13 16:37:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 14978 events. 9353/14978 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 100036 event pairs, 5960 based on Foata normal form. 0/12632 useless extension candidates. Maximal degree in co-relation 28501. Up to 13410 conditions per place. [2022-12-13 16:37:59,344 INFO L137 encePairwiseOnDemand]: 500/503 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 16:37:59,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 344 flow [2022-12-13 16:37:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:37:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2022-12-13 16:37:59,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49502982107355864 [2022-12-13 16:37:59,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2022-12-13 16:37:59,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2022-12-13 16:37:59,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:37:59,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2022-12-13 16:37:59,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:59,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:59,351 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:59,351 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 747 transitions. [2022-12-13 16:37:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 344 flow [2022-12-13 16:37:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 340 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:37:59,353 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2022-12-13 16:37:59,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-12-13 16:37:59,354 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-12-13 16:37:59,354 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2022-12-13 16:37:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:59,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:59,354 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:59,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:37:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:59,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:37:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash 695419437, now seen corresponding path program 1 times [2022-12-13 16:37:59,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:59,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275270361] [2022-12-13 16:37:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:59,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275270361] [2022-12-13 16:37:59,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275270361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847841955] [2022-12-13 16:37:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:59,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:59,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:59,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:59,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:37:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:37:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:59,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:59,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847841955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:59,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:59,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 16:37:59,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175031301] [2022-12-13 16:37:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:59,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:37:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:37:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:37:59,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 503 [2022-12-13 16:37:59,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:59,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:59,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 503 [2022-12-13 16:37:59,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:00,585 INFO L130 PetriNetUnfolder]: 9302/14868 cut-off events. [2022-12-13 16:38:00,586 INFO L131 PetriNetUnfolder]: For 576/576 co-relation queries the response was YES. [2022-12-13 16:38:00,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28897 conditions, 14868 events. 9302/14868 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 98842 event pairs, 8526 based on Foata normal form. 3/12721 useless extension candidates. Maximal degree in co-relation 28869. Up to 13426 conditions per place. [2022-12-13 16:38:00,629 INFO L137 encePairwiseOnDemand]: 500/503 looper letters, 55 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-12-13 16:38:00,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 308 flow [2022-12-13 16:38:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:38:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:38:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1406 transitions. [2022-12-13 16:38:00,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46587143803843606 [2022-12-13 16:38:00,633 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1406 transitions. [2022-12-13 16:38:00,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1406 transitions. [2022-12-13 16:38:00,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:00,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1406 transitions. [2022-12-13 16:38:00,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.33333333333334) internal successors, (1406), 6 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:00,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:00,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:00,641 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1406 transitions. [2022-12-13 16:38:00,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 308 flow [2022-12-13 16:38:00,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:38:00,643 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2022-12-13 16:38:00,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-12-13 16:38:00,644 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2022-12-13 16:38:00,644 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2022-12-13 16:38:00,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 226.0) internal successors, (1356), 6 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:00,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:00,645 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:00,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:38:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:00,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:38:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 619933380, now seen corresponding path program 2 times [2022-12-13 16:38:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358940772] [2022-12-13 16:38:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358940772] [2022-12-13 16:38:00,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358940772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:38:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473914231] [2022-12-13 16:38:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:38:00,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:00,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:38:00,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:38:00,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:38:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:38:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:38:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 16:38:00,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:38:01,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:38:01,051 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:38:01,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:38:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 16:38:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:38:01,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:38:01,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473914231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:38:01,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:38:01,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-13 16:38:01,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115651075] [2022-12-13 16:38:01,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:38:01,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:38:01,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:38:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:38:01,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 503 [2022-12-13 16:38:01,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 218.8) internal successors, (1094), 5 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:01,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:01,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 503 [2022-12-13 16:38:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:02,429 INFO L130 PetriNetUnfolder]: 9384/15516 cut-off events. [2022-12-13 16:38:02,429 INFO L131 PetriNetUnfolder]: For 598/598 co-relation queries the response was YES. [2022-12-13 16:38:02,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30303 conditions, 15516 events. 9384/15516 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 109739 event pairs, 3418 based on Foata normal form. 0/13613 useless extension candidates. Maximal degree in co-relation 30267. Up to 10755 conditions per place. [2022-12-13 16:38:02,476 INFO L137 encePairwiseOnDemand]: 494/503 looper letters, 98 selfloop transitions, 8 changer transitions 9/129 dead transitions. [2022-12-13 16:38:02,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 567 flow [2022-12-13 16:38:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:38:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:38:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 982 transitions. [2022-12-13 16:38:02,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48807157057654077 [2022-12-13 16:38:02,478 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 982 transitions. [2022-12-13 16:38:02,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 982 transitions. [2022-12-13 16:38:02,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:02,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 982 transitions. [2022-12-13 16:38:02,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.5) internal successors, (982), 4 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:02,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:02,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:02,481 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 4 states and 982 transitions. [2022-12-13 16:38:02,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 567 flow [2022-12-13 16:38:02,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 553 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:38:02,483 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 252 flow [2022-12-13 16:38:02,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-12-13 16:38:02,484 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2022-12-13 16:38:02,484 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 252 flow [2022-12-13 16:38:02,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.8) internal successors, (1094), 5 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:02,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:02,484 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:38:02,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:38:02,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:02,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:38:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash 578021925, now seen corresponding path program 1 times [2022-12-13 16:38:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287375681] [2022-12-13 16:38:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:02,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:38:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287375681] [2022-12-13 16:38:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287375681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:38:02,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512891730] [2022-12-13 16:38:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:02,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:02,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:38:02,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:38:02,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:38:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:38:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:38:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:38:02,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:38:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:38:02,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512891730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:38:02,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:38:02,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:38:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529193078] [2022-12-13 16:38:02,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:38:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:38:02,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:38:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:38:02,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 503 [2022-12-13 16:38:02,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 225.3846153846154) internal successors, (2930), 13 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:02,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:02,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 503 [2022-12-13 16:38:02,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:03,975 INFO L130 PetriNetUnfolder]: 9380/15448 cut-off events. [2022-12-13 16:38:03,975 INFO L131 PetriNetUnfolder]: For 2713/2713 co-relation queries the response was YES. [2022-12-13 16:38:03,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32913 conditions, 15448 events. 9380/15448 cut-off events. For 2713/2713 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 108570 event pairs, 8473 based on Foata normal form. 6/14411 useless extension candidates. Maximal degree in co-relation 32856. Up to 14166 conditions per place. [2022-12-13 16:38:04,022 INFO L137 encePairwiseOnDemand]: 500/503 looper letters, 61 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2022-12-13 16:38:04,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 432 flow [2022-12-13 16:38:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:38:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:38:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2759 transitions. [2022-12-13 16:38:04,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.457090788601723 [2022-12-13 16:38:04,026 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2759 transitions. [2022-12-13 16:38:04,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2759 transitions. [2022-12-13 16:38:04,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:04,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2759 transitions. [2022-12-13 16:38:04,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.91666666666666) internal successors, (2759), 12 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:04,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:04,037 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:04,037 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 252 flow. Second operand 12 states and 2759 transitions. [2022-12-13 16:38:04,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 432 flow [2022-12-13 16:38:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 86 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:38:04,041 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 336 flow [2022-12-13 16:38:04,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=336, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2022-12-13 16:38:04,042 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2022-12-13 16:38:04,042 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 336 flow [2022-12-13 16:38:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 225.3846153846154) internal successors, (2930), 13 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:04,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:04,043 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:38:04,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:38:04,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:38:04,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:38:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash -308653691, now seen corresponding path program 2 times [2022-12-13 16:38:04,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:04,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228517724] [2022-12-13 16:38:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:04,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:38:04,293 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:38:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:38:04,311 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:38:04,311 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:38:04,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 16:38:04,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 16:38:04,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 16:38:04,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 16:38:04,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 16:38:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:38:04,312 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-12-13 16:38:04,312 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:38:04,312 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 16:38:04,340 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:38:04,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,408 INFO L130 PetriNetUnfolder]: 110/649 cut-off events. [2022-12-13 16:38:04,409 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-12-13 16:38:04,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2823 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-12-13 16:38:04,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:38:04,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,417 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-12-13 16:38:04,545 INFO L130 PetriNetUnfolder]: 110/649 cut-off events. [2022-12-13 16:38:04,545 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-12-13 16:38:04,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2823 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-12-13 16:38:04,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 69204 [2022-12-13 16:38:07,585 INFO L134 LiptonReduction]: Checked pairs total: 115429 [2022-12-13 16:38:07,585 INFO L136 LiptonReduction]: Total number of compositions: 289 [2022-12-13 16:38:07,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:38:07,586 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;@2d77d75e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:38:07,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 16:38:07,588 INFO L130 PetriNetUnfolder]: 7/25 cut-off events. [2022-12-13 16:38:07,588 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:38:07,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:07,588 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:38:07,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:38:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1693459281, now seen corresponding path program 1 times [2022-12-13 16:38:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:07,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967668640] [2022-12-13 16:38:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:07,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967668640] [2022-12-13 16:38:07,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967668640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:38:07,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:38:07,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:38:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461993083] [2022-12-13 16:38:07,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:38:07,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:38:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:38:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:38:07,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 639 [2022-12-13 16:38:07,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:07,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:07,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 639 [2022-12-13 16:38:07,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:27,565 INFO L130 PetriNetUnfolder]: 250939/345958 cut-off events. [2022-12-13 16:38:27,565 INFO L131 PetriNetUnfolder]: For 3530/3530 co-relation queries the response was YES. [2022-12-13 16:38:28,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676742 conditions, 345958 events. 250939/345958 cut-off events. For 3530/3530 co-relation queries the response was YES. Maximal size of possible extension queue 8356. Compared 2586970 event pairs, 239201 based on Foata normal form. 62783/356774 useless extension candidates. Maximal degree in co-relation 87991. Up to 328708 conditions per place. [2022-12-13 16:38:29,223 INFO L137 encePairwiseOnDemand]: 594/639 looper letters, 73 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2022-12-13 16:38:29,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2022-12-13 16:38:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:38:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:38:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-12-13 16:38:29,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5075639019300991 [2022-12-13 16:38:29,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-12-13 16:38:29,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-12-13 16:38:29,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:29,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-12-13 16:38:29,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:29,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 639.0) internal successors, (2556), 4 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:29,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 639.0) internal successors, (2556), 4 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:29,233 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 973 transitions. [2022-12-13 16:38:29,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2022-12-13 16:38:29,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:38:29,238 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2022-12-13 16:38:29,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2022-12-13 16:38:29,238 INFO L288 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2022-12-13 16:38:29,239 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2022-12-13 16:38:29,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:29,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:29,240 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:38:29,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:38:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -223918549, now seen corresponding path program 1 times [2022-12-13 16:38:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:29,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138423545] [2022-12-13 16:38:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138423545] [2022-12-13 16:38:29,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138423545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:38:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725319403] [2022-12-13 16:38:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:29,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:38:29,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:38:29,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:38:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:38:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:38:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:38:29,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:38:29,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725319403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:38:29,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:38:29,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:38:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914313050] [2022-12-13 16:38:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:38:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:38:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:38:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:38:29,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 639 [2022-12-13 16:38:29,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:29,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:29,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 639 [2022-12-13 16:38:29,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:48,581 INFO L130 PetriNetUnfolder]: 250880/346345 cut-off events. [2022-12-13 16:38:48,581 INFO L131 PetriNetUnfolder]: For 3488/3488 co-relation queries the response was YES. [2022-12-13 16:38:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677193 conditions, 346345 events. 250880/346345 cut-off events. For 3488/3488 co-relation queries the response was YES. Maximal size of possible extension queue 8285. Compared 2597056 event pairs, 157105 based on Foata normal form. 0/294352 useless extension candidates. Maximal degree in co-relation 677179. Up to 328677 conditions per place. [2022-12-13 16:38:50,009 INFO L137 encePairwiseOnDemand]: 636/639 looper letters, 89 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2022-12-13 16:38:50,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 434 flow [2022-12-13 16:38:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:38:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:38:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 946 transitions. [2022-12-13 16:38:50,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4934793948878456 [2022-12-13 16:38:50,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 946 transitions. [2022-12-13 16:38:50,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 946 transitions. [2022-12-13 16:38:50,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:50,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 946 transitions. [2022-12-13 16:38:50,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:50,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 639.0) internal successors, (2556), 4 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:50,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 639.0) internal successors, (2556), 4 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:50,016 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 946 transitions. [2022-12-13 16:38:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 434 flow [2022-12-13 16:38:50,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 430 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:38:50,018 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2022-12-13 16:38:50,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2022-12-13 16:38:50,018 INFO L288 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2022-12-13 16:38:50,018 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2022-12-13 16:38:50,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:50,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:50,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:50,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 16:38:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:38:50,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:38:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -835250620, now seen corresponding path program 1 times [2022-12-13 16:38:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688713229] [2022-12-13 16:38:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:50,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688713229] [2022-12-13 16:38:50,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688713229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:38:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742581208] [2022-12-13 16:38:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:50,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:38:50,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:38:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:38:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:50,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:38:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:38:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:50,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:38:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742581208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:38:50,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:38:50,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:38:50,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81219710] [2022-12-13 16:38:50,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:38:50,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:38:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:38:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:38:50,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 639 [2022-12-13 16:38:50,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 285.85714285714283) internal successors, (2001), 7 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:50,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:50,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 639 [2022-12-13 16:38:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:39:11,232 INFO L130 PetriNetUnfolder]: 252661/347404 cut-off events. [2022-12-13 16:39:11,232 INFO L131 PetriNetUnfolder]: For 12094/12094 co-relation queries the response was YES. [2022-12-13 16:39:11,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686871 conditions, 347404 events. 252661/347404 cut-off events. For 12094/12094 co-relation queries the response was YES. Maximal size of possible extension queue 8266. Compared 2576593 event pairs, 239201 based on Foata normal form. 3/299600 useless extension candidates. Maximal degree in co-relation 686842. Up to 328693 conditions per place. [2022-12-13 16:39:12,667 INFO L137 encePairwiseOnDemand]: 636/639 looper letters, 74 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2022-12-13 16:39:12,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 398 flow [2022-12-13 16:39:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:39:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:39:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1785 transitions. [2022-12-13 16:39:12,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46557120500782473 [2022-12-13 16:39:12,670 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1785 transitions. [2022-12-13 16:39:12,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1785 transitions. [2022-12-13 16:39:12,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:39:12,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1785 transitions. [2022-12-13 16:39:12,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.5) internal successors, (1785), 6 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:12,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:12,676 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:12,677 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1785 transitions. [2022-12-13 16:39:12,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 398 flow [2022-12-13 16:39:12,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:39:12,687 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2022-12-13 16:39:12,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-12-13 16:39:12,687 INFO L288 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2022-12-13 16:39:12,687 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2022-12-13 16:39:12,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 285.85714285714283) internal successors, (2001), 7 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:12,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:39:12,688 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:39:12,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:39:12,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:39:12,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:39:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:39:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 196905066, now seen corresponding path program 2 times [2022-12-13 16:39:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:39:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942425207] [2022-12-13 16:39:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:39:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:39:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:39:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:39:12,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:39:12,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942425207] [2022-12-13 16:39:12,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942425207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:39:12,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697726741] [2022-12-13 16:39:12,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:39:12,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:39:12,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:39:12,954 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:39:12,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:39:13,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:39:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:39:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 16:39:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:39:13,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 16:39:13,055 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:39:13,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:39:13,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 16:39:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:39:13,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:39:13,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697726741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:39:13,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:39:13,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:39:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200085557] [2022-12-13 16:39:13,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:39:13,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:39:13,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:39:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:39:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:39:13,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 639 [2022-12-13 16:39:13,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 274.3333333333333) internal successors, (1646), 6 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:13,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:39:13,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 639 [2022-12-13 16:39:13,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:39:35,351 INFO L130 PetriNetUnfolder]: 257638/360529 cut-off events. [2022-12-13 16:39:35,351 INFO L131 PetriNetUnfolder]: For 12689/12689 co-relation queries the response was YES. [2022-12-13 16:39:36,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712497 conditions, 360529 events. 257638/360529 cut-off events. For 12689/12689 co-relation queries the response was YES. Maximal size of possible extension queue 9393. Compared 2825969 event pairs, 61501 based on Foata normal form. 0/316860 useless extension candidates. Maximal degree in co-relation 712460. Up to 294913 conditions per place. [2022-12-13 16:39:36,888 INFO L137 encePairwiseOnDemand]: 627/639 looper letters, 198 selfloop transitions, 18 changer transitions 0/231 dead transitions. [2022-12-13 16:39:36,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 231 transitions, 1019 flow [2022-12-13 16:39:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:39:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:39:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1859 transitions. [2022-12-13 16:39:36,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48487219613980176 [2022-12-13 16:39:36,892 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1859 transitions. [2022-12-13 16:39:36,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1859 transitions. [2022-12-13 16:39:36,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:39:36,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1859 transitions. [2022-12-13 16:39:36,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 309.8333333333333) internal successors, (1859), 6 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:36,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:36,902 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:36,902 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1859 transitions. [2022-12-13 16:39:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 231 transitions, 1019 flow [2022-12-13 16:39:36,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 231 transitions, 1005 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:39:36,912 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2022-12-13 16:39:36,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2022-12-13 16:39:36,913 INFO L288 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2022-12-13 16:39:36,913 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2022-12-13 16:39:36,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 274.3333333333333) internal successors, (1646), 6 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:36,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:39:36,914 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 16:39:36,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:39:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:39:37,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:39:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:39:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1264636530, now seen corresponding path program 1 times [2022-12-13 16:39:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:39:37,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628161387] [2022-12-13 16:39:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:39:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:39:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:39:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:39:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:39:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628161387] [2022-12-13 16:39:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628161387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:39:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025987838] [2022-12-13 16:39:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:39:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:39:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:39:37,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:39:37,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:39:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:39:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:39:37,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:39:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:39:37,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:39:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:39:37,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025987838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:39:37,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:39:37,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:39:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377678615] [2022-12-13 16:39:37,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:39:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:39:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:39:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:39:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:39:37,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 639 [2022-12-13 16:39:37,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 285.46153846153845) internal successors, (3711), 13 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:39:37,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:39:37,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 639 [2022-12-13 16:39:37,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:40:03,814 INFO L130 PetriNetUnfolder]: 257754/359159 cut-off events. [2022-12-13 16:40:03,814 INFO L131 PetriNetUnfolder]: For 137423/137423 co-relation queries the response was YES. [2022-12-13 16:40:04,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802293 conditions, 359159 events. 257754/359159 cut-off events. For 137423/137423 co-relation queries the response was YES. Maximal size of possible extension queue 9407. Compared 2772980 event pairs, 229837 based on Foata normal form. 6/336905 useless extension candidates. Maximal degree in co-relation 802233. Up to 341824 conditions per place. [2022-12-13 16:40:05,754 INFO L137 encePairwiseOnDemand]: 636/639 looper letters, 90 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2022-12-13 16:40:05,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 116 transitions, 613 flow [2022-12-13 16:40:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:40:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:40:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3498 transitions. [2022-12-13 16:40:05,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45618153364632236 [2022-12-13 16:40:05,761 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3498 transitions. [2022-12-13 16:40:05,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3498 transitions. [2022-12-13 16:40:05,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:40:05,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3498 transitions. [2022-12-13 16:40:05,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 291.5) internal successors, (3498), 12 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:40:05,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 639.0) internal successors, (8307), 13 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:40:05,772 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 639.0) internal successors, (8307), 13 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:40:05,773 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 12 states and 3498 transitions. [2022-12-13 16:40:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 116 transitions, 613 flow [2022-12-13 16:40:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 613 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:40:06,326 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 459 flow [2022-12-13 16:40:06,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=459, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2022-12-13 16:40:06,326 INFO L288 CegarLoopForPetriNet]: 88 programPoint places, 37 predicate places. [2022-12-13 16:40:06,326 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 459 flow [2022-12-13 16:40:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 285.46153846153845) internal successors, (3711), 13 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:40:06,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:40:06,327 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 16:40:06,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 16:40:06,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6900f118-4e8e-435f-b245-524c51b65875/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:40:06,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:40:06,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:40:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash -714709966, now seen corresponding path program 2 times [2022-12-13 16:40:06,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:40:06,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067454179] [2022-12-13 16:40:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:40:06,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:40:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:40:06,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:40:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:40:06,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:40:06,569 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:40:06,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 16:40:06,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 16:40:06,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 16:40:06,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 16:40:06,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 16:40:06,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 16:40:06,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 16:40:06,570 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-12-13 16:40:06,570 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:40:06,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 16:40:06,595 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 16:40:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,828 INFO L130 PetriNetUnfolder]: 157/922 cut-off events. [2022-12-13 16:40:06,828 INFO L131 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-12-13 16:40:06,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4402 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-12-13 16:40:06,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,839 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:40:06,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-12-13 16:40:06,963 INFO L130 PetriNetUnfolder]: 157/922 cut-off events. [2022-12-13 16:40:06,963 INFO L131 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-12-13 16:40:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4402 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-12-13 16:40:07,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 114464 [2022-12-13 16:40:10,463 INFO L134 LiptonReduction]: Checked pairs total: 215344 [2022-12-13 16:40:10,464 INFO L136 LiptonReduction]: Total number of compositions: 354 [2022-12-13 16:40:10,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:40:10,465 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;@2d77d75e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:40:10,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 16:40:10,468 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2022-12-13 16:40:10,468 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:40:10,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:40:10,468 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:40:10,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 16:40:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:40:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1172334274, now seen corresponding path program 1 times [2022-12-13 16:40:10,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:40:10,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226789149] [2022-12-13 16:40:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:40:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:40:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:40:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:40:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:40:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226789149] [2022-12-13 16:40:10,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226789149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:40:10,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:40:10,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:40:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794004048] [2022-12-13 16:40:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:40:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:40:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:40:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:40:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:40:10,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 779 [2022-12-13 16:40:10,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 164 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:40:10,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:40:10,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 779 [2022-12-13 16:40:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand