./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/fibonacci.wvr.c --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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- 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 14:59:50,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:59:50,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:59:50,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:59:50,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:59:50,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:59:50,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:59:50,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:59:50,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:59:50,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:59:50,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:59:50,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:59:50,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:59:50,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:59:50,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:59:50,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:59:50,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:59:50,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:59:50,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:59:50,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:59:50,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:59:50,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:59:50,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:59:50,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:59:50,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:59:50,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:59:50,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:59:50,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:59:50,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:59:50,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:59:50,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:59:50,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:59:50,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:59:50,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:59:50,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:59:50,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:59:50,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:59:50,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:59:50,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:59:50,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:59:50,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:59:50,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:59:50,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:59:50,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:59:50,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:59:50,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:59:50,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:59:50,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:59:50,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:59:50,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:59:50,326 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:59:50,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:59:50,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:59:50,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:59:50,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:59:50,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:59:50,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:59:50,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:59:50,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:59:50,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:59:50,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:59:50,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:59:50,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:59:50,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:59:50,330 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:59:50,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:59:50,330 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:59:50,330 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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-12-13 14:59:50,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:59:50,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:59:50,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:59:50,517 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:59:50,518 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:59:50,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-12-13 14:59:53,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:59:53,214 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:59:53,214 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-12-13 14:59:53,219 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/data/afc9ea69d/e77096645e154ac1966948a23ebc4686/FLAG04d30b532 [2022-12-13 14:59:53,638 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/data/afc9ea69d/e77096645e154ac1966948a23ebc4686 [2022-12-13 14:59:53,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:59:53,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:59:53,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:59:53,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:59:53,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:59:53,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f407fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53, skipping insertion in model container [2022-12-13 14:59:53,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:59:53,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:59:53,779 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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-12-13 14:59:53,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:59:53,793 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:59:53,807 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_e9dccd66-e033-4ae9-8f43-4c7e63c17622/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-12-13 14:59:53,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:59:53,820 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:59:53,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53 WrapperNode [2022-12-13 14:59:53,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:59:53,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:59:53,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:59:53,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:59:53,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,847 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-12-13 14:59:53,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:59:53,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:59:53,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:59:53,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:59:53,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:59:53,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:59:53,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:59:53,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:59:53,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (1/1) ... [2022-12-13 14:59:53,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:59:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:59:53,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:59:53,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:59:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:59:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:59:53,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:59:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:59:53,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:59:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:59:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:59:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:59:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:59:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:59:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:59:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:59:53,927 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 14:59:54,007 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:59:54,009 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:59:54,265 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:59:54,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:59:54,276 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:59:54,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:59:54 BoogieIcfgContainer [2022-12-13 14:59:54,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:59:54,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:59:54,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:59:54,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:59:54,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:59:53" (1/3) ... [2022-12-13 14:59:54,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a654c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:59:54, skipping insertion in model container [2022-12-13 14:59:54,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:59:53" (2/3) ... [2022-12-13 14:59:54,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a654c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:59:54, skipping insertion in model container [2022-12-13 14:59:54,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:59:54" (3/3) ... [2022-12-13 14:59:54,289 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-12-13 14:59:54,298 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:59:54,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:59:54,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:59:54,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:59:54,411 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:59:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 220 transitions, 456 flow [2022-12-13 14:59:54,505 INFO L130 PetriNetUnfolder]: 14/218 cut-off events. [2022-12-13 14:59:54,505 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:59:54,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 14/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 313 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-12-13 14:59:54,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 220 transitions, 456 flow [2022-12-13 14:59:54,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 209 transitions, 430 flow [2022-12-13 14:59:54,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:59:54,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 209 transitions, 430 flow [2022-12-13 14:59:54,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 209 transitions, 430 flow [2022-12-13 14:59:54,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 209 transitions, 430 flow [2022-12-13 14:59:54,574 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2022-12-13 14:59:54,574 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:59:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 14/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 277 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-12-13 14:59:54,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 10692 [2022-12-13 14:59:59,541 INFO L134 LiptonReduction]: Checked pairs total: 8824 [2022-12-13 14:59:59,541 INFO L136 LiptonReduction]: Total number of compositions: 237 [2022-12-13 14:59:59,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:59:59,556 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;@7df359e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:59:59,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 14:59:59,559 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 14:59:59,559 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:59:59,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:59:59,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:59:59,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:59:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:59:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash -274762792, now seen corresponding path program 1 times [2022-12-13 14:59:59,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:59:59,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577309081] [2022-12-13 14:59:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:59:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:59,941 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 14:59:59,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:59:59,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577309081] [2022-12-13 14:59:59,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577309081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:59:59,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:59:59,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:59:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972423004] [2022-12-13 14:59:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:59:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:59:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:59:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:59:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:00:00,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 457 [2022-12-13 15:00:00,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 15:00:00,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:00,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 457 [2022-12-13 15:00:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:00,139 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2022-12-13 15:00:00,139 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 15:00:00,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 336 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2022-12-13 15:00:00,141 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2022-12-13 15:00:00,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2022-12-13 15:00:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 989 transitions. [2022-12-13 15:00:00,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328227571115974 [2022-12-13 15:00:00,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 989 transitions. [2022-12-13 15:00:00,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 989 transitions. [2022-12-13 15:00:00,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:00,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 989 transitions. [2022-12-13 15:00:00,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 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 15:00:00,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,184 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 989 transitions. [2022-12-13 15:00:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2022-12-13 15:00:00,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 15:00:00,190 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2022-12-13 15:00:00,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-13 15:00:00,195 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-12-13 15:00:00,196 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2022-12-13 15:00:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 15:00:00,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:00,197 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:00:00,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1806037320, now seen corresponding path program 2 times [2022-12-13 15:00:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579205488] [2022-12-13 15:00:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:00,386 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 15:00:00,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579205488] [2022-12-13 15:00:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579205488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:00:00,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:00:00,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:00:00,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736835818] [2022-12-13 15:00:00,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:00:00,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:00:00,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:00:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:00:00,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 457 [2022-12-13 15:00:00,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 15:00:00,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:00,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 457 [2022-12-13 15:00:00,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:00,530 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2022-12-13 15:00:00,530 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 15:00:00,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 281 event pairs, 5 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2022-12-13 15:00:00,531 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2022-12-13 15:00:00,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2022-12-13 15:00:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 987 transitions. [2022-12-13 15:00:00,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43194748358862145 [2022-12-13 15:00:00,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 987 transitions. [2022-12-13 15:00:00,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 987 transitions. [2022-12-13 15:00:00,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:00,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 987 transitions. [2022-12-13 15:00:00,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.4) internal successors, (987), 5 states have internal predecessors, (987), 0 states have call successors, (0), 0 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 15:00:00,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,546 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,546 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 987 transitions. [2022-12-13 15:00:00,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2022-12-13 15:00:00,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:00:00,547 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2022-12-13 15:00:00,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-12-13 15:00:00,548 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-12-13 15:00:00,549 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2022-12-13 15:00:00,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 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 15:00:00,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:00,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:00,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:00:00,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash -620944409, now seen corresponding path program 1 times [2022-12-13 15:00:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211457331] [2022-12-13 15:00:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:00,620 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 15:00:00,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211457331] [2022-12-13 15:00:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211457331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835704241] [2022-12-13 15:00:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:00,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:00,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:00:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:00,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:00,744 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 15:00:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:00,771 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 15:00:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835704241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:00,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:00,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:00,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629217931] [2022-12-13 15:00:00,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:00,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:00:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:00:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:00:00,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:00,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 195.4) internal successors, (1954), 10 states have internal predecessors, (1954), 0 states have call successors, (0), 0 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 15:00:00,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:00,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:00,955 INFO L130 PetriNetUnfolder]: 106/197 cut-off events. [2022-12-13 15:00:00,955 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-12-13 15:00:00,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 197 events. 106/197 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 625 event pairs, 26 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 624. Up to 108 conditions per place. [2022-12-13 15:00:00,957 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 40 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2022-12-13 15:00:00,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 333 flow [2022-12-13 15:00:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2022-12-13 15:00:00,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4402625820568928 [2022-12-13 15:00:00,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2022-12-13 15:00:00,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2022-12-13 15:00:00,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:00,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2022-12-13 15:00:00,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 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 15:00:00,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,971 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:00,971 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 1006 transitions. [2022-12-13 15:00:00,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 333 flow [2022-12-13 15:00:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 311 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:00,975 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 172 flow [2022-12-13 15:00:00,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-12-13 15:00:00,976 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-12-13 15:00:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 172 flow [2022-12-13 15:00:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.4) internal successors, (1954), 10 states have internal predecessors, (1954), 0 states have call successors, (0), 0 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 15:00:00,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:00,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:00,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:01,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:01,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1285383138, now seen corresponding path program 1 times [2022-12-13 15:00:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:01,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210984817] [2022-12-13 15:00:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210984817] [2022-12-13 15:00:01,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210984817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:00:01,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:00:01,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:00:01,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590160014] [2022-12-13 15:00:01,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:00:01,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:00:01,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:00:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:00:01,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 457 [2022-12-13 15:00:01,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 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 15:00:01,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:01,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 457 [2022-12-13 15:00:01,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:01,484 INFO L130 PetriNetUnfolder]: 121/230 cut-off events. [2022-12-13 15:00:01,485 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2022-12-13 15:00:01,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 230 events. 121/230 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 780 event pairs, 42 based on Foata normal form. 4/234 useless extension candidates. Maximal degree in co-relation 544. Up to 142 conditions per place. [2022-12-13 15:00:01,487 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 36 selfloop transitions, 9 changer transitions 6/51 dead transitions. [2022-12-13 15:00:01,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 365 flow [2022-12-13 15:00:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1012 transitions. [2022-12-13 15:00:01,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4428884026258206 [2022-12-13 15:00:01,491 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1012 transitions. [2022-12-13 15:00:01,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1012 transitions. [2022-12-13 15:00:01,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:01,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1012 transitions. [2022-12-13 15:00:01,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 15:00:01,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:01,500 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:01,501 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 172 flow. Second operand 5 states and 1012 transitions. [2022-12-13 15:00:01,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 365 flow [2022-12-13 15:00:01,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 363 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 15:00:01,505 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 215 flow [2022-12-13 15:00:01,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2022-12-13 15:00:01,506 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2022-12-13 15:00:01,506 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 215 flow [2022-12-13 15:00:01,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 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 15:00:01,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:01,507 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:01,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:00:01,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:01,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash -73269972, now seen corresponding path program 2 times [2022-12-13 15:00:01,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:01,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474407400] [2022-12-13 15:00:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:01,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474407400] [2022-12-13 15:00:01,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474407400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:00:01,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:00:01,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:00:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770144878] [2022-12-13 15:00:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:00:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:00:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:00:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:00:01,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 457 [2022-12-13 15:00:01,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 15:00:01,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:01,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 457 [2022-12-13 15:00:01,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:01,692 INFO L130 PetriNetUnfolder]: 112/217 cut-off events. [2022-12-13 15:00:01,692 INFO L131 PetriNetUnfolder]: For 477/477 co-relation queries the response was YES. [2022-12-13 15:00:01,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 217 events. 112/217 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 728 event pairs, 38 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 848. Up to 140 conditions per place. [2022-12-13 15:00:01,694 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 33 selfloop transitions, 9 changer transitions 5/47 dead transitions. [2022-12-13 15:00:01,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 380 flow [2022-12-13 15:00:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1007 transitions. [2022-12-13 15:00:01,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44070021881838073 [2022-12-13 15:00:01,698 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1007 transitions. [2022-12-13 15:00:01,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1007 transitions. [2022-12-13 15:00:01,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:01,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1007 transitions. [2022-12-13 15:00:01,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 0 states have call successors, (0), 0 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 15:00:01,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:01,706 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:01,706 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 215 flow. Second operand 5 states and 1007 transitions. [2022-12-13 15:00:01,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 380 flow [2022-12-13 15:00:01,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 363 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 15:00:01,709 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 240 flow [2022-12-13 15:00:01,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2022-12-13 15:00:01,710 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2022-12-13 15:00:01,710 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 240 flow [2022-12-13 15:00:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 15:00:01,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:01,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:00:01,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 622924129, now seen corresponding path program 2 times [2022-12-13 15:00:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400042387] [2022-12-13 15:00:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:01,774 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 15:00:01,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400042387] [2022-12-13 15:00:01,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400042387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046211555] [2022-12-13 15:00:01,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:01,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:01,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:01,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:00:01,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:01,864 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 15:00:01,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:01,885 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 15:00:01,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046211555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:01,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 15:00:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415363773] [2022-12-13 15:00:01,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:00:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:00:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:00:01,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:01,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:00:01,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:01,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:01,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:02,036 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2022-12-13 15:00:02,037 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2022-12-13 15:00:02,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 223 events. 118/223 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 747 event pairs, 16 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 910. Up to 120 conditions per place. [2022-12-13 15:00:02,038 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 44 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2022-12-13 15:00:02,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 439 flow [2022-12-13 15:00:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2022-12-13 15:00:02,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43982494529540483 [2022-12-13 15:00:02,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2022-12-13 15:00:02,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2022-12-13 15:00:02,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:02,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2022-12-13 15:00:02,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 15:00:02,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:02,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:02,045 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 240 flow. Second operand 5 states and 1005 transitions. [2022-12-13 15:00:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 439 flow [2022-12-13 15:00:02,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 424 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 15:00:02,048 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 274 flow [2022-12-13 15:00:02,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-12-13 15:00:02,049 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2022-12-13 15:00:02,049 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 274 flow [2022-12-13 15:00:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:00:02,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:02,049 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:02,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:00:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:02,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1976236128, now seen corresponding path program 3 times [2022-12-13 15:00:02,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:02,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091972272] [2022-12-13 15:00:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:02,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:02,339 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 15:00:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091972272] [2022-12-13 15:00:02,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091972272] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142258886] [2022-12-13 15:00:02,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:02,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:02,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:02,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:02,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:00:02,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:00:02,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:02,423 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 15:00:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:02,439 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 15:00:02,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142258886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:02,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:02,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 15:00:02,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741467967] [2022-12-13 15:00:02,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:00:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:00:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:00:02,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:02,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 195.625) internal successors, (1565), 8 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 15:00:02,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:02,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:02,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:02,570 INFO L130 PetriNetUnfolder]: 124/233 cut-off events. [2022-12-13 15:00:02,570 INFO L131 PetriNetUnfolder]: For 778/778 co-relation queries the response was YES. [2022-12-13 15:00:02,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 233 events. 124/233 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 771 event pairs, 22 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 1004. Up to 98 conditions per place. [2022-12-13 15:00:02,572 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 39 selfloop transitions, 12 changer transitions 1/52 dead transitions. [2022-12-13 15:00:02,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 478 flow [2022-12-13 15:00:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2022-12-13 15:00:02,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43807439824945293 [2022-12-13 15:00:02,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2022-12-13 15:00:02,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2022-12-13 15:00:02,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:02,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2022-12-13 15:00:02,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 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 15:00:02,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:02,579 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:02,579 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 274 flow. Second operand 5 states and 1001 transitions. [2022-12-13 15:00:02,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 478 flow [2022-12-13 15:00:02,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 460 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:02,583 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 316 flow [2022-12-13 15:00:02,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2022-12-13 15:00:02,584 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2022-12-13 15:00:02,584 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 316 flow [2022-12-13 15:00:02,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 195.625) internal successors, (1565), 8 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 15:00:02,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:02,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:02,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:02,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash 806281403, now seen corresponding path program 3 times [2022-12-13 15:00:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178604334] [2022-12-13 15:00:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:02,857 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 15:00:02,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178604334] [2022-12-13 15:00:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178604334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154102884] [2022-12-13 15:00:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:02,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:02,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:00:02,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:00:02,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:02,971 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 15:00:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:02,997 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 15:00:02,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154102884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:02,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:02,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:02,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572507426] [2022-12-13 15:00:02,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:02,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:00:02,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:00:02,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:00:03,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:03,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 195.6) internal successors, (1956), 10 states have internal predecessors, (1956), 0 states have call successors, (0), 0 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 15:00:03,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:03,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:03,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:03,206 INFO L130 PetriNetUnfolder]: 124/231 cut-off events. [2022-12-13 15:00:03,206 INFO L131 PetriNetUnfolder]: For 866/866 co-relation queries the response was YES. [2022-12-13 15:00:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 231 events. 124/231 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 768 event pairs, 16 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 1042. Up to 104 conditions per place. [2022-12-13 15:00:03,209 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 51 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2022-12-13 15:00:03,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 581 flow [2022-12-13 15:00:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:00:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:00:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1599 transitions. [2022-12-13 15:00:03,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.437363238512035 [2022-12-13 15:00:03,213 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1599 transitions. [2022-12-13 15:00:03,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1599 transitions. [2022-12-13 15:00:03,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:03,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1599 transitions. [2022-12-13 15:00:03,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 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 15:00:03,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:00:03,219 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:00:03,219 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 316 flow. Second operand 8 states and 1599 transitions. [2022-12-13 15:00:03,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 581 flow [2022-12-13 15:00:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 563 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:03,222 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 355 flow [2022-12-13 15:00:03,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2022-12-13 15:00:03,223 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2022-12-13 15:00:03,223 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 355 flow [2022-12-13 15:00:03,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.6) internal successors, (1956), 10 states have internal predecessors, (1956), 0 states have call successors, (0), 0 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 15:00:03,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:03,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:03,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:00:03,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:03,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1967138416, now seen corresponding path program 4 times [2022-12-13 15:00:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:03,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038611665] [2022-12-13 15:00:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:03,483 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 15:00:03,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:03,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038611665] [2022-12-13 15:00:03,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038611665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:03,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574881111] [2022-12-13 15:00:03,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:03,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:03,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:03,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:03,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:00:03,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:03,572 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 15:00:03,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:03,588 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 15:00:03,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574881111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:03,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:03,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996194288] [2022-12-13 15:00:03,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:03,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:00:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:00:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:00:03,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:03,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 355 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 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 15:00:03,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:03,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:03,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:03,747 INFO L130 PetriNetUnfolder]: 130/241 cut-off events. [2022-12-13 15:00:03,747 INFO L131 PetriNetUnfolder]: For 1041/1041 co-relation queries the response was YES. [2022-12-13 15:00:03,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 241 events. 130/241 cut-off events. For 1041/1041 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 816 event pairs, 40 based on Foata normal form. 4/245 useless extension candidates. Maximal degree in co-relation 1182. Up to 160 conditions per place. [2022-12-13 15:00:03,749 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2022-12-13 15:00:03,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 534 flow [2022-12-13 15:00:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:00:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:00:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2022-12-13 15:00:03,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.437636761487965 [2022-12-13 15:00:03,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2022-12-13 15:00:03,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2022-12-13 15:00:03,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:03,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2022-12-13 15:00:03,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 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 15:00:03,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:03,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 457.0) internal successors, (2742), 6 states have internal predecessors, (2742), 0 states have call successors, (0), 0 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 15:00:03,755 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 355 flow. Second operand 5 states and 1000 transitions. [2022-12-13 15:00:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 534 flow [2022-12-13 15:00:03,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 496 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 15:00:03,759 INFO L231 Difference]: Finished difference. Result has 58 places, 38 transitions, 357 flow [2022-12-13 15:00:03,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=58, PETRI_TRANSITIONS=38} [2022-12-13 15:00:03,760 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2022-12-13 15:00:03,760 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 38 transitions, 357 flow [2022-12-13 15:00:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 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 15:00:03,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:03,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:03,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:00:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:03,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1836548500, now seen corresponding path program 5 times [2022-12-13 15:00:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:03,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289192994] [2022-12-13 15:00:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:04,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289192994] [2022-12-13 15:00:04,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289192994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:00:04,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:00:04,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:00:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335629011] [2022-12-13 15:00:04,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:00:04,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:00:04,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:00:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:00:04,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 457 [2022-12-13 15:00:04,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 38 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 15:00:04,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:04,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 457 [2022-12-13 15:00:04,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:04,121 INFO L130 PetriNetUnfolder]: 122/225 cut-off events. [2022-12-13 15:00:04,121 INFO L131 PetriNetUnfolder]: For 1031/1031 co-relation queries the response was YES. [2022-12-13 15:00:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 225 events. 122/225 cut-off events. For 1031/1031 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 727 event pairs, 40 based on Foata normal form. 6/231 useless extension candidates. Maximal degree in co-relation 1070. Up to 162 conditions per place. [2022-12-13 15:00:04,124 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 28 selfloop transitions, 12 changer transitions 9/49 dead transitions. [2022-12-13 15:00:04,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 494 flow [2022-12-13 15:00:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:00:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:00:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1199 transitions. [2022-12-13 15:00:04,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43727206418672504 [2022-12-13 15:00:04,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1199 transitions. [2022-12-13 15:00:04,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1199 transitions. [2022-12-13 15:00:04,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:04,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1199 transitions. [2022-12-13 15:00:04,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.83333333333334) internal successors, (1199), 6 states have internal predecessors, (1199), 0 states have call successors, (0), 0 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 15:00:04,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 15:00:04,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 457.0) internal successors, (3199), 7 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 15:00:04,130 INFO L175 Difference]: Start difference. First operand has 58 places, 38 transitions, 357 flow. Second operand 6 states and 1199 transitions. [2022-12-13 15:00:04,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 494 flow [2022-12-13 15:00:04,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 464 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 15:00:04,134 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 300 flow [2022-12-13 15:00:04,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2022-12-13 15:00:04,134 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2022-12-13 15:00:04,134 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 300 flow [2022-12-13 15:00:04,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 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 15:00:04,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:04,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:04,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:00:04,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:04,136 INFO L85 PathProgramCache]: Analyzing trace with hash -61413804, now seen corresponding path program 6 times [2022-12-13 15:00:04,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235649748] [2022-12-13 15:00:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:04,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:04,176 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 15:00:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235649748] [2022-12-13 15:00:04,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235649748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780014710] [2022-12-13 15:00:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:04,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:00:04,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:00:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:00:04,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:04,266 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 15:00:04,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:04,288 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 15:00:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780014710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:04,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:04,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22491155] [2022-12-13 15:00:04,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:00:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:00:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:00:04,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:04,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 34 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 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 15:00:04,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:04,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:04,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:04,456 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2022-12-13 15:00:04,456 INFO L131 PetriNetUnfolder]: For 744/744 co-relation queries the response was YES. [2022-12-13 15:00:04,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 193 events. 110/193 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 570 event pairs, 9 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 923. Up to 86 conditions per place. [2022-12-13 15:00:04,458 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2022-12-13 15:00:04,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 504 flow [2022-12-13 15:00:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:00:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:00:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1588 transitions. [2022-12-13 15:00:04,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43435448577680524 [2022-12-13 15:00:04,462 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1588 transitions. [2022-12-13 15:00:04,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1588 transitions. [2022-12-13 15:00:04,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:04,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1588 transitions. [2022-12-13 15:00:04,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.5) internal successors, (1588), 8 states have internal predecessors, (1588), 0 states have call successors, (0), 0 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 15:00:04,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:00:04,471 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:00:04,471 INFO L175 Difference]: Start difference. First operand has 60 places, 34 transitions, 300 flow. Second operand 8 states and 1588 transitions. [2022-12-13 15:00:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 504 flow [2022-12-13 15:00:04,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 455 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-12-13 15:00:04,475 INFO L231 Difference]: Finished difference. Result has 56 places, 35 transitions, 294 flow [2022-12-13 15:00:04,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=56, PETRI_TRANSITIONS=35} [2022-12-13 15:00:04,475 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2022-12-13 15:00:04,476 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 35 transitions, 294 flow [2022-12-13 15:00:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 195.3) internal successors, (1953), 10 states have internal predecessors, (1953), 0 states have call successors, (0), 0 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 15:00:04,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:04,476 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:04,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:00:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:04,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:04,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2130267241, now seen corresponding path program 1 times [2022-12-13 15:00:04,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210673064] [2022-12-13 15:00:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210673064] [2022-12-13 15:00:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210673064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336189531] [2022-12-13 15:00:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:05,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:00:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:05,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336189531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:05,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:05,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:05,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380694220] [2022-12-13 15:00:05,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:05,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:05,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 35 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 187.5) internal successors, (2250), 12 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 15:00:05,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:05,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:05,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:05,828 INFO L130 PetriNetUnfolder]: 130/234 cut-off events. [2022-12-13 15:00:05,828 INFO L131 PetriNetUnfolder]: For 730/758 co-relation queries the response was YES. [2022-12-13 15:00:05,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 234 events. 130/234 cut-off events. For 730/758 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 798 event pairs, 4 based on Foata normal form. 15/242 useless extension candidates. Maximal degree in co-relation 1122. Up to 165 conditions per place. [2022-12-13 15:00:05,831 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2022-12-13 15:00:05,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 550 flow [2022-12-13 15:00:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1335 transitions. [2022-12-13 15:00:05,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173179118474523 [2022-12-13 15:00:05,834 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1335 transitions. [2022-12-13 15:00:05,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1335 transitions. [2022-12-13 15:00:05,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:05,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1335 transitions. [2022-12-13 15:00:05,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.71428571428572) internal successors, (1335), 7 states have internal predecessors, (1335), 0 states have call successors, (0), 0 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 15:00:05,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:05,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:05,842 INFO L175 Difference]: Start difference. First operand has 56 places, 35 transitions, 294 flow. Second operand 7 states and 1335 transitions. [2022-12-13 15:00:05,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 550 flow [2022-12-13 15:00:05,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 499 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:05,846 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 395 flow [2022-12-13 15:00:05,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2022-12-13 15:00:05,846 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2022-12-13 15:00:05,846 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 395 flow [2022-12-13 15:00:05,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.5) internal successors, (2250), 12 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 15:00:05,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:05,847 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:05,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:00:06,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:06,048 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1317993581, now seen corresponding path program 2 times [2022-12-13 15:00:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275876685] [2022-12-13 15:00:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:06,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:06,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275876685] [2022-12-13 15:00:06,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275876685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566327864] [2022-12-13 15:00:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:06,351 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:06,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:00:06,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:06,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:06,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:06,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:06,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566327864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:06,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:06,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 15:00:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591424052] [2022-12-13 15:00:06,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:06,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:06,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 187.66666666666666) internal successors, (2252), 12 states have internal predecessors, (2252), 0 states have call successors, (0), 0 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 15:00:06,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:06,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:06,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:06,995 INFO L130 PetriNetUnfolder]: 142/260 cut-off events. [2022-12-13 15:00:06,995 INFO L131 PetriNetUnfolder]: For 1048/1090 co-relation queries the response was YES. [2022-12-13 15:00:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 260 events. 142/260 cut-off events. For 1048/1090 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 937 event pairs, 6 based on Foata normal form. 11/262 useless extension candidates. Maximal degree in co-relation 1316. Up to 169 conditions per place. [2022-12-13 15:00:06,998 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2022-12-13 15:00:06,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 637 flow [2022-12-13 15:00:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1340 transitions. [2022-12-13 15:00:07,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188809002813379 [2022-12-13 15:00:07,001 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1340 transitions. [2022-12-13 15:00:07,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1340 transitions. [2022-12-13 15:00:07,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:07,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1340 transitions. [2022-12-13 15:00:07,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.42857142857142) internal successors, (1340), 7 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 15:00:07,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:07,009 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:07,009 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 395 flow. Second operand 7 states and 1340 transitions. [2022-12-13 15:00:07,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 637 flow [2022-12-13 15:00:07,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 71 transitions, 604 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:07,014 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 464 flow [2022-12-13 15:00:07,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2022-12-13 15:00:07,015 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2022-12-13 15:00:07,015 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 464 flow [2022-12-13 15:00:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.66666666666666) internal successors, (2252), 12 states have internal predecessors, (2252), 0 states have call successors, (0), 0 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 15:00:07,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:07,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:07,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:00:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:00:07,218 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1139030303, now seen corresponding path program 3 times [2022-12-13 15:00:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:07,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216296804] [2022-12-13 15:00:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:07,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:07,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216296804] [2022-12-13 15:00:07,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216296804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88303021] [2022-12-13 15:00:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:07,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:00:07,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:00:07,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:07,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:07,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:07,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88303021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:07,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:07,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 15:00:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549748996] [2022-12-13 15:00:07,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:08,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:08,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 187.6153846153846) internal successors, (2439), 13 states have internal predecessors, (2439), 0 states have call successors, (0), 0 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 15:00:08,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:08,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:08,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:08,189 INFO L130 PetriNetUnfolder]: 139/251 cut-off events. [2022-12-13 15:00:08,189 INFO L131 PetriNetUnfolder]: For 1445/1479 co-relation queries the response was YES. [2022-12-13 15:00:08,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 251 events. 139/251 cut-off events. For 1445/1479 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 885 event pairs, 6 based on Foata normal form. 13/257 useless extension candidates. Maximal degree in co-relation 1353. Up to 169 conditions per place. [2022-12-13 15:00:08,192 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2022-12-13 15:00:08,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 665 flow [2022-12-13 15:00:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1336 transitions. [2022-12-13 15:00:08,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4176305095342294 [2022-12-13 15:00:08,194 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1336 transitions. [2022-12-13 15:00:08,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1336 transitions. [2022-12-13 15:00:08,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:08,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1336 transitions. [2022-12-13 15:00:08,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.85714285714286) internal successors, (1336), 7 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 15:00:08,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:08,198 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:08,198 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 464 flow. Second operand 7 states and 1336 transitions. [2022-12-13 15:00:08,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 665 flow [2022-12-13 15:00:08,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 605 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-12-13 15:00:08,202 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 498 flow [2022-12-13 15:00:08,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2022-12-13 15:00:08,202 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2022-12-13 15:00:08,202 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 498 flow [2022-12-13 15:00:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.6153846153846) internal successors, (2439), 13 states have internal predecessors, (2439), 0 states have call successors, (0), 0 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 15:00:08,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:08,203 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:08,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:00:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:00:08,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash -431589031, now seen corresponding path program 4 times [2022-12-13 15:00:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:08,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314358177] [2022-12-13 15:00:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314358177] [2022-12-13 15:00:08,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314358177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86760837] [2022-12-13 15:00:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:08,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:08,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:08,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:00:08,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:08,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:08,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:08,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:08,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:08,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86760837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:08,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:08,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 15:00:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433076213] [2022-12-13 15:00:08,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:00:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:00:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:00:09,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:09,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 498 flow. Second operand has 11 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 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 15:00:09,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:09,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:09,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:09,243 INFO L130 PetriNetUnfolder]: 160/288 cut-off events. [2022-12-13 15:00:09,243 INFO L131 PetriNetUnfolder]: For 1720/1758 co-relation queries the response was YES. [2022-12-13 15:00:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 288 events. 160/288 cut-off events. For 1720/1758 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1071 event pairs, 6 based on Foata normal form. 17/298 useless extension candidates. Maximal degree in co-relation 1593. Up to 241 conditions per place. [2022-12-13 15:00:09,245 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2022-12-13 15:00:09,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 752 flow [2022-12-13 15:00:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1327 transitions. [2022-12-13 15:00:09,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41481713035323536 [2022-12-13 15:00:09,247 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1327 transitions. [2022-12-13 15:00:09,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1327 transitions. [2022-12-13 15:00:09,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:09,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1327 transitions. [2022-12-13 15:00:09,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 189.57142857142858) internal successors, (1327), 7 states have internal predecessors, (1327), 0 states have call successors, (0), 0 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 15:00:09,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:09,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:09,251 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 498 flow. Second operand 7 states and 1327 transitions. [2022-12-13 15:00:09,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 752 flow [2022-12-13 15:00:09,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 701 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-13 15:00:09,256 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 601 flow [2022-12-13 15:00:09,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2022-12-13 15:00:09,256 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2022-12-13 15:00:09,256 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 601 flow [2022-12-13 15:00:09,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 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 15:00:09,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:09,257 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:09,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:00:09,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:00:09,457 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2131741443, now seen corresponding path program 5 times [2022-12-13 15:00:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:09,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757707018] [2022-12-13 15:00:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757707018] [2022-12-13 15:00:09,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757707018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703088552] [2022-12-13 15:00:09,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:09,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:09,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:00:09,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:00:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:09,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703088552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:09,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:09,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 15:00:09,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435356496] [2022-12-13 15:00:09,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:09,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:09,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:10,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:10,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 601 flow. Second operand has 13 states, 13 states have (on average 187.53846153846155) internal successors, (2438), 13 states have internal predecessors, (2438), 0 states have call successors, (0), 0 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 15:00:10,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:10,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:10,249 INFO L130 PetriNetUnfolder]: 174/316 cut-off events. [2022-12-13 15:00:10,249 INFO L131 PetriNetUnfolder]: For 2108/2146 co-relation queries the response was YES. [2022-12-13 15:00:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 316 events. 174/316 cut-off events. For 2108/2146 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1213 event pairs, 10 based on Foata normal form. 17/326 useless extension candidates. Maximal degree in co-relation 1822. Up to 245 conditions per place. [2022-12-13 15:00:10,251 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2022-12-13 15:00:10,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 872 flow [2022-12-13 15:00:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1334 transitions. [2022-12-13 15:00:10,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4170053141606752 [2022-12-13 15:00:10,253 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1334 transitions. [2022-12-13 15:00:10,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1334 transitions. [2022-12-13 15:00:10,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:10,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1334 transitions. [2022-12-13 15:00:10,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 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 15:00:10,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:10,257 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:10,257 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 601 flow. Second operand 7 states and 1334 transitions. [2022-12-13 15:00:10,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 872 flow [2022-12-13 15:00:10,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 823 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:10,265 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 670 flow [2022-12-13 15:00:10,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=670, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2022-12-13 15:00:10,265 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-12-13 15:00:10,265 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 670 flow [2022-12-13 15:00:10,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 187.53846153846155) internal successors, (2438), 13 states have internal predecessors, (2438), 0 states have call successors, (0), 0 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 15:00:10,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:10,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:10,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:00:10,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:00:10,468 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2135520223, now seen corresponding path program 6 times [2022-12-13 15:00:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651762290] [2022-12-13 15:00:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:10,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:10,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651762290] [2022-12-13 15:00:10,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651762290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233317685] [2022-12-13 15:00:10,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:10,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:00:10,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:00:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 15:00:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:10,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:11,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233317685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:11,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 15:00:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13697009] [2022-12-13 15:00:11,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:00:11,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:00:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:00:11,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:11,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 670 flow. Second operand has 14 states, 14 states have (on average 187.42857142857142) internal successors, (2624), 14 states have internal predecessors, (2624), 0 states have call successors, (0), 0 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 15:00:11,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:11,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:11,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:11,367 INFO L130 PetriNetUnfolder]: 171/307 cut-off events. [2022-12-13 15:00:11,367 INFO L131 PetriNetUnfolder]: For 2462/2506 co-relation queries the response was YES. [2022-12-13 15:00:11,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1853 conditions, 307 events. 171/307 cut-off events. For 2462/2506 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1173 event pairs, 10 based on Foata normal form. 15/315 useless extension candidates. Maximal degree in co-relation 1817. Up to 245 conditions per place. [2022-12-13 15:00:11,369 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2022-12-13 15:00:11,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 897 flow [2022-12-13 15:00:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1332 transitions. [2022-12-13 15:00:11,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.416380118787121 [2022-12-13 15:00:11,372 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1332 transitions. [2022-12-13 15:00:11,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1332 transitions. [2022-12-13 15:00:11,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:11,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1332 transitions. [2022-12-13 15:00:11,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 15:00:11,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:11,379 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:11,379 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 670 flow. Second operand 7 states and 1332 transitions. [2022-12-13 15:00:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 897 flow [2022-12-13 15:00:11,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 815 flow, removed 32 selfloop flow, removed 3 redundant places. [2022-12-13 15:00:11,384 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 692 flow [2022-12-13 15:00:11,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2022-12-13 15:00:11,384 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2022-12-13 15:00:11,384 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 692 flow [2022-12-13 15:00:11,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 187.42857142857142) internal successors, (2624), 14 states have internal predecessors, (2624), 0 states have call successors, (0), 0 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 15:00:11,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:11,385 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:11,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:00:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:11,586 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1326281586, now seen corresponding path program 7 times [2022-12-13 15:00:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743109623] [2022-12-13 15:00:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743109623] [2022-12-13 15:00:11,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743109623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135802440] [2022-12-13 15:00:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:00:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:11,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:11,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:00:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:11,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:11,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135802440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:11,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:11,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 15:00:11,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188567931] [2022-12-13 15:00:11,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:11,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:00:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:00:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:00:11,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:11,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 692 flow. Second operand has 11 states, 11 states have (on average 195.1818181818182) internal successors, (2147), 11 states have internal predecessors, (2147), 0 states have call successors, (0), 0 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 15:00:11,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:11,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:11,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:12,055 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2022-12-13 15:00:12,055 INFO L131 PetriNetUnfolder]: For 3099/3099 co-relation queries the response was YES. [2022-12-13 15:00:12,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 403 events. 228/403 cut-off events. For 3099/3099 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1570 event pairs, 23 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2331. Up to 154 conditions per place. [2022-12-13 15:00:12,060 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2022-12-13 15:00:12,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 103 transitions, 1179 flow [2022-12-13 15:00:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1404 transitions. [2022-12-13 15:00:12,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43888715223507346 [2022-12-13 15:00:12,062 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1404 transitions. [2022-12-13 15:00:12,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1404 transitions. [2022-12-13 15:00:12,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:12,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1404 transitions. [2022-12-13 15:00:12,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.57142857142858) internal successors, (1404), 7 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 15:00:12,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:12,065 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:12,065 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 692 flow. Second operand 7 states and 1404 transitions. [2022-12-13 15:00:12,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 103 transitions, 1179 flow [2022-12-13 15:00:12,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 1112 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-12-13 15:00:12,072 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 787 flow [2022-12-13 15:00:12,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=787, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2022-12-13 15:00:12,072 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2022-12-13 15:00:12,072 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 787 flow [2022-12-13 15:00:12,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.1818181818182) internal successors, (2147), 11 states have internal predecessors, (2147), 0 states have call successors, (0), 0 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 15:00:12,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:12,073 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:12,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:00:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:00:12,274 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1901784981, now seen corresponding path program 8 times [2022-12-13 15:00:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057728410] [2022-12-13 15:00:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057728410] [2022-12-13 15:00:12,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057728410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590356116] [2022-12-13 15:00:12,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:12,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:12,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:12,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:00:12,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:12,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:12,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:12,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590356116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:12,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:12,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 15:00:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161733243] [2022-12-13 15:00:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:00:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:00:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:00:12,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:12,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 787 flow. Second operand has 11 states, 11 states have (on average 195.36363636363637) internal successors, (2149), 11 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 15:00:12,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:12,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:12,794 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2022-12-13 15:00:12,794 INFO L131 PetriNetUnfolder]: For 3768/3768 co-relation queries the response was YES. [2022-12-13 15:00:12,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2558 conditions, 413 events. 230/413 cut-off events. For 3768/3768 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1658 event pairs, 39 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2516. Up to 153 conditions per place. [2022-12-13 15:00:12,800 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2022-12-13 15:00:12,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 118 transitions, 1368 flow [2022-12-13 15:00:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:00:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:00:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2185 transitions. [2022-12-13 15:00:12,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43465287447781975 [2022-12-13 15:00:12,803 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2185 transitions. [2022-12-13 15:00:12,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2185 transitions. [2022-12-13 15:00:12,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:12,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2185 transitions. [2022-12-13 15:00:12,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 198.63636363636363) internal successors, (2185), 11 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 15:00:12,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:12,810 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:12,810 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 787 flow. Second operand 11 states and 2185 transitions. [2022-12-13 15:00:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 118 transitions, 1368 flow [2022-12-13 15:00:12,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 118 transitions, 1321 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:12,819 INFO L231 Difference]: Finished difference. Result has 103 places, 83 transitions, 1043 flow [2022-12-13 15:00:12,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1043, PETRI_PLACES=103, PETRI_TRANSITIONS=83} [2022-12-13 15:00:12,820 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places. [2022-12-13 15:00:12,820 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 83 transitions, 1043 flow [2022-12-13 15:00:12,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.36363636363637) internal successors, (2149), 11 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 15:00:12,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:12,820 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:12,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:00:13,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:13,021 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash -466717491, now seen corresponding path program 9 times [2022-12-13 15:00:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:13,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372718728] [2022-12-13 15:00:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:13,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372718728] [2022-12-13 15:00:13,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372718728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:13,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670415486] [2022-12-13 15:00:13,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:13,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:13,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:13,091 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:13,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:00:13,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:00:13,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:13,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:13,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670415486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:13,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:13,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 15:00:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986801643] [2022-12-13 15:00:13,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:13,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:13,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 83 transitions, 1043 flow. Second operand has 13 states, 13 states have (on average 195.15384615384616) internal successors, (2537), 13 states have internal predecessors, (2537), 0 states have call successors, (0), 0 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 15:00:13,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:13,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:13,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:13,614 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2022-12-13 15:00:13,614 INFO L131 PetriNetUnfolder]: For 5181/5181 co-relation queries the response was YES. [2022-12-13 15:00:13,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3203 conditions, 492 events. 265/492 cut-off events. For 5181/5181 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2122 event pairs, 39 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3156. Up to 159 conditions per place. [2022-12-13 15:00:13,622 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2022-12-13 15:00:13,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 161 transitions, 1951 flow [2022-12-13 15:00:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:00:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:00:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3570 transitions. [2022-12-13 15:00:13,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4339897884755653 [2022-12-13 15:00:13,625 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3570 transitions. [2022-12-13 15:00:13,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3570 transitions. [2022-12-13 15:00:13,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:13,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3570 transitions. [2022-12-13 15:00:13,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.33333333333334) internal successors, (3570), 18 states have internal predecessors, (3570), 0 states have call successors, (0), 0 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 15:00:13,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:13,633 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:13,633 INFO L175 Difference]: Start difference. First operand has 103 places, 83 transitions, 1043 flow. Second operand 18 states and 3570 transitions. [2022-12-13 15:00:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 161 transitions, 1951 flow [2022-12-13 15:00:13,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1798 flow, removed 50 selfloop flow, removed 8 redundant places. [2022-12-13 15:00:13,645 INFO L231 Difference]: Finished difference. Result has 116 places, 103 transitions, 1387 flow [2022-12-13 15:00:13,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1387, PETRI_PLACES=116, PETRI_TRANSITIONS=103} [2022-12-13 15:00:13,645 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2022-12-13 15:00:13,646 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 103 transitions, 1387 flow [2022-12-13 15:00:13,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.15384615384616) internal successors, (2537), 13 states have internal predecessors, (2537), 0 states have call successors, (0), 0 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 15:00:13,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:13,646 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:13,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:00:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:13,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 305172534, now seen corresponding path program 10 times [2022-12-13 15:00:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860928492] [2022-12-13 15:00:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860928492] [2022-12-13 15:00:13,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860928492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686019522] [2022-12-13 15:00:13,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:13,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:13,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:00:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:14,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686019522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:14,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:14,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 15:00:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957842071] [2022-12-13 15:00:14,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:14,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:14,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:14,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 1387 flow. Second operand has 13 states, 13 states have (on average 195.3846153846154) internal successors, (2540), 13 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:14,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:14,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:14,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:14,399 INFO L130 PetriNetUnfolder]: 315/576 cut-off events. [2022-12-13 15:00:14,399 INFO L131 PetriNetUnfolder]: For 7713/7713 co-relation queries the response was YES. [2022-12-13 15:00:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 576 events. 315/576 cut-off events. For 7713/7713 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2491 event pairs, 25 based on Foata normal form. 28/604 useless extension candidates. Maximal degree in co-relation 3870. Up to 369 conditions per place. [2022-12-13 15:00:14,405 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 112 selfloop transitions, 41 changer transitions 0/153 dead transitions. [2022-12-13 15:00:14,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 153 transitions, 2135 flow [2022-12-13 15:00:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:00:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:00:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2196 transitions. [2022-12-13 15:00:14,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368410582852596 [2022-12-13 15:00:14,409 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2196 transitions. [2022-12-13 15:00:14,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2196 transitions. [2022-12-13 15:00:14,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:14,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2196 transitions. [2022-12-13 15:00:14,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 199.63636363636363) internal successors, (2196), 11 states have internal predecessors, (2196), 0 states have call successors, (0), 0 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 15:00:14,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:14,417 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:14,418 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 1387 flow. Second operand 11 states and 2196 transitions. [2022-12-13 15:00:14,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 153 transitions, 2135 flow [2022-12-13 15:00:14,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 153 transitions, 1954 flow, removed 40 selfloop flow, removed 8 redundant places. [2022-12-13 15:00:14,439 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 1570 flow [2022-12-13 15:00:14,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1570, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2022-12-13 15:00:14,440 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2022-12-13 15:00:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 1570 flow [2022-12-13 15:00:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.3846153846154) internal successors, (2540), 13 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:14,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:14,441 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:14,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:00:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:14,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash -856171710, now seen corresponding path program 11 times [2022-12-13 15:00:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:14,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200297455] [2022-12-13 15:00:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200297455] [2022-12-13 15:00:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200297455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180218505] [2022-12-13 15:00:14,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:14,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:14,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:14,728 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:14,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:00:14,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:00:14,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:14,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:14,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180218505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:14,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:14,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320619042] [2022-12-13 15:00:14,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:14,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:14,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 1570 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:14,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:14,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:14,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:15,272 INFO L130 PetriNetUnfolder]: 397/744 cut-off events. [2022-12-13 15:00:15,272 INFO L131 PetriNetUnfolder]: For 12651/12651 co-relation queries the response was YES. [2022-12-13 15:00:15,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5493 conditions, 744 events. 397/744 cut-off events. For 12651/12651 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3555 event pairs, 9 based on Foata normal form. 10/754 useless extension candidates. Maximal degree in co-relation 5442. Up to 175 conditions per place. [2022-12-13 15:00:15,279 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 120 selfloop transitions, 102 changer transitions 1/223 dead transitions. [2022-12-13 15:00:15,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 223 transitions, 3302 flow [2022-12-13 15:00:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:00:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:00:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3975 transitions. [2022-12-13 15:00:15,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349015317286652 [2022-12-13 15:00:15,284 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3975 transitions. [2022-12-13 15:00:15,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3975 transitions. [2022-12-13 15:00:15,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:15,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3975 transitions. [2022-12-13 15:00:15,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 198.75) internal successors, (3975), 20 states have internal predecessors, (3975), 0 states have call successors, (0), 0 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 15:00:15,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 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 15:00:15,292 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 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 15:00:15,292 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 1570 flow. Second operand 20 states and 3975 transitions. [2022-12-13 15:00:15,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 223 transitions, 3302 flow [2022-12-13 15:00:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 223 transitions, 2960 flow, removed 164 selfloop flow, removed 2 redundant places. [2022-12-13 15:00:15,317 INFO L231 Difference]: Finished difference. Result has 146 places, 168 transitions, 2602 flow [2022-12-13 15:00:15,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2602, PETRI_PLACES=146, PETRI_TRANSITIONS=168} [2022-12-13 15:00:15,318 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2022-12-13 15:00:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 168 transitions, 2602 flow [2022-12-13 15:00:15,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:15,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:15,318 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:15,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:00:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 15:00:15,520 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash 78481291, now seen corresponding path program 12 times [2022-12-13 15:00:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946005062] [2022-12-13 15:00:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946005062] [2022-12-13 15:00:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946005062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504925772] [2022-12-13 15:00:15,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:15,602 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:15,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:00:15,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:00:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:15,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:15,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504925772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:15,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:15,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179919196] [2022-12-13 15:00:15,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:15,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:15,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 168 transitions, 2602 flow. Second operand has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 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 15:00:15,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:15,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:15,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:16,125 INFO L130 PetriNetUnfolder]: 477/914 cut-off events. [2022-12-13 15:00:16,125 INFO L131 PetriNetUnfolder]: For 19205/19205 co-relation queries the response was YES. [2022-12-13 15:00:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 914 events. 477/914 cut-off events. For 19205/19205 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4682 event pairs, 94 based on Foata normal form. 8/918 useless extension candidates. Maximal degree in co-relation 7066. Up to 464 conditions per place. [2022-12-13 15:00:16,132 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 186 selfloop transitions, 65 changer transitions 0/251 dead transitions. [2022-12-13 15:00:16,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 251 transitions, 4334 flow [2022-12-13 15:00:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:00:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:00:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2600 transitions. [2022-12-13 15:00:16,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.437636761487965 [2022-12-13 15:00:16,134 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2600 transitions. [2022-12-13 15:00:16,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2600 transitions. [2022-12-13 15:00:16,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:16,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2600 transitions. [2022-12-13 15:00:16,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 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 15:00:16,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 457.0) internal successors, (6398), 14 states have internal predecessors, (6398), 0 states have call successors, (0), 0 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 15:00:16,140 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 457.0) internal successors, (6398), 14 states have internal predecessors, (6398), 0 states have call successors, (0), 0 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 15:00:16,140 INFO L175 Difference]: Start difference. First operand has 146 places, 168 transitions, 2602 flow. Second operand 13 states and 2600 transitions. [2022-12-13 15:00:16,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 251 transitions, 4334 flow [2022-12-13 15:00:16,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 251 transitions, 3291 flow, removed 475 selfloop flow, removed 9 redundant places. [2022-12-13 15:00:16,194 INFO L231 Difference]: Finished difference. Result has 155 places, 186 transitions, 2494 flow [2022-12-13 15:00:16,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2494, PETRI_PLACES=155, PETRI_TRANSITIONS=186} [2022-12-13 15:00:16,195 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2022-12-13 15:00:16,195 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 186 transitions, 2494 flow [2022-12-13 15:00:16,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 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 15:00:16,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:16,195 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:16,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:00:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:16,397 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1710937544, now seen corresponding path program 13 times [2022-12-13 15:00:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:16,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067556425] [2022-12-13 15:00:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067556425] [2022-12-13 15:00:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067556425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599752894] [2022-12-13 15:00:16,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:00:16,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:16,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:16,470 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:16,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:00:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:16,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:16,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599752894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:16,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:16,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:16,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85174473] [2022-12-13 15:00:16,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:16,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:16,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:16,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:16,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 186 transitions, 2494 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:16,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:16,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:16,978 INFO L130 PetriNetUnfolder]: 462/883 cut-off events. [2022-12-13 15:00:16,978 INFO L131 PetriNetUnfolder]: For 11608/11608 co-relation queries the response was YES. [2022-12-13 15:00:16,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5913 conditions, 883 events. 462/883 cut-off events. For 11608/11608 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4509 event pairs, 25 based on Foata normal form. 34/917 useless extension candidates. Maximal degree in co-relation 5852. Up to 462 conditions per place. [2022-12-13 15:00:16,985 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 138 selfloop transitions, 87 changer transitions 0/225 dead transitions. [2022-12-13 15:00:16,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 225 transitions, 3219 flow [2022-12-13 15:00:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:00:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:00:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2790 transitions. [2022-12-13 15:00:16,987 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4360737730540794 [2022-12-13 15:00:16,987 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2790 transitions. [2022-12-13 15:00:16,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2790 transitions. [2022-12-13 15:00:16,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:16,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2790 transitions. [2022-12-13 15:00:16,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.28571428571428) internal successors, (2790), 14 states have internal predecessors, (2790), 0 states have call successors, (0), 0 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 15:00:16,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:00:16,994 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:00:16,994 INFO L175 Difference]: Start difference. First operand has 155 places, 186 transitions, 2494 flow. Second operand 14 states and 2790 transitions. [2022-12-13 15:00:16,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 225 transitions, 3219 flow [2022-12-13 15:00:17,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 225 transitions, 3032 flow, removed 78 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:17,029 INFO L231 Difference]: Finished difference. Result has 162 places, 182 transitions, 2536 flow [2022-12-13 15:00:17,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2536, PETRI_PLACES=162, PETRI_TRANSITIONS=182} [2022-12-13 15:00:17,029 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 142 predicate places. [2022-12-13 15:00:17,029 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 182 transitions, 2536 flow [2022-12-13 15:00:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:17,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:17,030 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:17,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:00:17,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:17,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash -23644917, now seen corresponding path program 14 times [2022-12-13 15:00:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376556165] [2022-12-13 15:00:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:17,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:17,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:17,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376556165] [2022-12-13 15:00:17,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376556165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:17,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505457556] [2022-12-13 15:00:17,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:17,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:17,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:17,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:00:17,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:17,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:17,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:17,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505457556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:17,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:17,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938020647] [2022-12-13 15:00:17,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:17,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:17,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 2536 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:17,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:17,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:17,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:17,871 INFO L130 PetriNetUnfolder]: 451/866 cut-off events. [2022-12-13 15:00:17,871 INFO L131 PetriNetUnfolder]: For 11221/11221 co-relation queries the response was YES. [2022-12-13 15:00:17,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5903 conditions, 866 events. 451/866 cut-off events. For 11221/11221 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4417 event pairs, 76 based on Foata normal form. 16/882 useless extension candidates. Maximal degree in co-relation 5842. Up to 376 conditions per place. [2022-12-13 15:00:17,880 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 167 selfloop transitions, 79 changer transitions 2/248 dead transitions. [2022-12-13 15:00:17,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 248 transitions, 3569 flow [2022-12-13 15:00:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:00:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:00:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3577 transitions. [2022-12-13 15:00:17,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4348407488451252 [2022-12-13 15:00:17,883 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3577 transitions. [2022-12-13 15:00:17,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3577 transitions. [2022-12-13 15:00:17,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:17,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3577 transitions. [2022-12-13 15:00:17,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.72222222222223) internal successors, (3577), 18 states have internal predecessors, (3577), 0 states have call successors, (0), 0 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 15:00:17,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:17,896 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:17,897 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 2536 flow. Second operand 18 states and 3577 transitions. [2022-12-13 15:00:17,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 248 transitions, 3569 flow [2022-12-13 15:00:17,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 248 transitions, 3439 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-12-13 15:00:17,931 INFO L231 Difference]: Finished difference. Result has 172 places, 186 transitions, 2715 flow [2022-12-13 15:00:17,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2715, PETRI_PLACES=172, PETRI_TRANSITIONS=186} [2022-12-13 15:00:17,931 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 152 predicate places. [2022-12-13 15:00:17,931 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 186 transitions, 2715 flow [2022-12-13 15:00:17,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:17,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:17,932 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:17,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:00:18,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 15:00:18,133 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1691207088, now seen corresponding path program 15 times [2022-12-13 15:00:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503480526] [2022-12-13 15:00:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503480526] [2022-12-13 15:00:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503480526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804867413] [2022-12-13 15:00:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:18,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:18,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:00:18,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:00:18,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:18,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804867413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:18,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:18,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 15:00:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882026741] [2022-12-13 15:00:18,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:18,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:00:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:00:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:00:18,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:18,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 186 transitions, 2715 flow. Second operand has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 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 15:00:18,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:18,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:18,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:18,842 INFO L130 PetriNetUnfolder]: 543/1074 cut-off events. [2022-12-13 15:00:18,842 INFO L131 PetriNetUnfolder]: For 16783/16783 co-relation queries the response was YES. [2022-12-13 15:00:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7642 conditions, 1074 events. 543/1074 cut-off events. For 16783/16783 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5969 event pairs, 23 based on Foata normal form. 16/1090 useless extension candidates. Maximal degree in co-relation 7580. Up to 313 conditions per place. [2022-12-13 15:00:18,849 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 134 selfloop transitions, 135 changer transitions 5/274 dead transitions. [2022-12-13 15:00:18,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 274 transitions, 4338 flow [2022-12-13 15:00:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:00:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:00:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4160 transitions. [2022-12-13 15:00:18,859 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43346879233093677 [2022-12-13 15:00:18,859 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4160 transitions. [2022-12-13 15:00:18,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4160 transitions. [2022-12-13 15:00:18,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:18,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4160 transitions. [2022-12-13 15:00:18,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.0952380952381) internal successors, (4160), 21 states have internal predecessors, (4160), 0 states have call successors, (0), 0 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 15:00:18,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 457.0) internal successors, (10054), 22 states have internal predecessors, (10054), 0 states have call successors, (0), 0 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 15:00:18,874 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 457.0) internal successors, (10054), 22 states have internal predecessors, (10054), 0 states have call successors, (0), 0 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 15:00:18,874 INFO L175 Difference]: Start difference. First operand has 172 places, 186 transitions, 2715 flow. Second operand 21 states and 4160 transitions. [2022-12-13 15:00:18,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 274 transitions, 4338 flow [2022-12-13 15:00:18,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 274 transitions, 3980 flow, removed 137 selfloop flow, removed 10 redundant places. [2022-12-13 15:00:18,945 INFO L231 Difference]: Finished difference. Result has 187 places, 216 transitions, 3500 flow [2022-12-13 15:00:18,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3500, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2022-12-13 15:00:18,946 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2022-12-13 15:00:18,946 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 3500 flow [2022-12-13 15:00:18,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 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 15:00:18,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:18,947 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:18,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:00:19,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:19,148 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2060642704, now seen corresponding path program 16 times [2022-12-13 15:00:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:19,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661103620] [2022-12-13 15:00:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:19,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661103620] [2022-12-13 15:00:19,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661103620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980043650] [2022-12-13 15:00:19,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:19,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:19,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:19,221 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:19,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:00:19,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:19,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:19,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:19,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980043650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:19,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:19,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:19,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953938828] [2022-12-13 15:00:19,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:19,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:19,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 3500 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:19,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:19,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:19,887 INFO L130 PetriNetUnfolder]: 701/1384 cut-off events. [2022-12-13 15:00:19,887 INFO L131 PetriNetUnfolder]: For 23681/23681 co-relation queries the response was YES. [2022-12-13 15:00:19,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 1384 events. 701/1384 cut-off events. For 23681/23681 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8207 event pairs, 33 based on Foata normal form. 24/1408 useless extension candidates. Maximal degree in co-relation 10182. Up to 434 conditions per place. [2022-12-13 15:00:19,896 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 176 selfloop transitions, 151 changer transitions 0/327 dead transitions. [2022-12-13 15:00:19,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 327 transitions, 5627 flow [2022-12-13 15:00:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:00:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:00:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2993 transitions. [2022-12-13 15:00:19,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4366156090444931 [2022-12-13 15:00:19,898 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2993 transitions. [2022-12-13 15:00:19,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2993 transitions. [2022-12-13 15:00:19,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:19,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2993 transitions. [2022-12-13 15:00:19,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.53333333333333) internal successors, (2993), 15 states have internal predecessors, (2993), 0 states have call successors, (0), 0 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 15:00:19,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 15:00:19,914 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 15:00:19,914 INFO L175 Difference]: Start difference. First operand has 187 places, 216 transitions, 3500 flow. Second operand 15 states and 2993 transitions. [2022-12-13 15:00:19,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 327 transitions, 5627 flow [2022-12-13 15:00:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 327 transitions, 5241 flow, removed 152 selfloop flow, removed 8 redundant places. [2022-12-13 15:00:20,018 INFO L231 Difference]: Finished difference. Result has 195 places, 259 transitions, 4477 flow [2022-12-13 15:00:20,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4477, PETRI_PLACES=195, PETRI_TRANSITIONS=259} [2022-12-13 15:00:20,019 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2022-12-13 15:00:20,019 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 259 transitions, 4477 flow [2022-12-13 15:00:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:20,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:20,019 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:20,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 15:00:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:00:20,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1042111243, now seen corresponding path program 17 times [2022-12-13 15:00:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:20,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741295041] [2022-12-13 15:00:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:20,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:20,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741295041] [2022-12-13 15:00:20,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741295041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:20,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021096062] [2022-12-13 15:00:20,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:20,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:20,278 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:20,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:00:20,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:20,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:20,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021096062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:20,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:20,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 15:00:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202328521] [2022-12-13 15:00:20,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:20,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:00:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:00:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:00:20,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:20,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 259 transitions, 4477 flow. Second operand has 15 states, 15 states have (on average 195.0) internal successors, (2925), 15 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 15:00:20,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:20,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:20,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:21,053 INFO L130 PetriNetUnfolder]: 732/1469 cut-off events. [2022-12-13 15:00:21,053 INFO L131 PetriNetUnfolder]: For 28371/28371 co-relation queries the response was YES. [2022-12-13 15:00:21,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11376 conditions, 1469 events. 732/1469 cut-off events. For 28371/28371 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9017 event pairs, 27 based on Foata normal form. 24/1493 useless extension candidates. Maximal degree in co-relation 11304. Up to 721 conditions per place. [2022-12-13 15:00:21,069 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 231 selfloop transitions, 111 changer transitions 7/349 dead transitions. [2022-12-13 15:00:21,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 349 transitions, 6219 flow [2022-12-13 15:00:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:00:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:00:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4561 transitions. [2022-12-13 15:00:21,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4339263628579583 [2022-12-13 15:00:21,074 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4561 transitions. [2022-12-13 15:00:21,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4561 transitions. [2022-12-13 15:00:21,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:21,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4561 transitions. [2022-12-13 15:00:21,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 198.30434782608697) internal successors, (4561), 23 states have internal predecessors, (4561), 0 states have call successors, (0), 0 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 15:00:21,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:00:21,085 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:00:21,085 INFO L175 Difference]: Start difference. First operand has 195 places, 259 transitions, 4477 flow. Second operand 23 states and 4561 transitions. [2022-12-13 15:00:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 349 transitions, 6219 flow [2022-12-13 15:00:21,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 349 transitions, 6033 flow, removed 78 selfloop flow, removed 4 redundant places. [2022-12-13 15:00:21,192 INFO L231 Difference]: Finished difference. Result has 222 places, 277 transitions, 5164 flow [2022-12-13 15:00:21,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5164, PETRI_PLACES=222, PETRI_TRANSITIONS=277} [2022-12-13 15:00:21,192 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2022-12-13 15:00:21,192 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 277 transitions, 5164 flow [2022-12-13 15:00:21,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 195.0) internal successors, (2925), 15 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 15:00:21,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:21,193 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:21,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 15:00:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:00:21,394 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 618105041, now seen corresponding path program 18 times [2022-12-13 15:00:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141207805] [2022-12-13 15:00:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:21,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:21,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:21,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141207805] [2022-12-13 15:00:21,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141207805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:21,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372115356] [2022-12-13 15:00:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:21,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:21,481 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:21,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:00:21,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:00:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:21,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:21,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372115356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:21,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:21,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 15:00:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165963790] [2022-12-13 15:00:21,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:21,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:00:21,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:00:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:00:21,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:21,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 277 transitions, 5164 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:00:21,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:21,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:21,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:22,264 INFO L130 PetriNetUnfolder]: 832/1665 cut-off events. [2022-12-13 15:00:22,265 INFO L131 PetriNetUnfolder]: For 38355/38355 co-relation queries the response was YES. [2022-12-13 15:00:22,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13890 conditions, 1665 events. 832/1665 cut-off events. For 38355/38355 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10522 event pairs, 54 based on Foata normal form. 36/1701 useless extension candidates. Maximal degree in co-relation 13809. Up to 1292 conditions per place. [2022-12-13 15:00:22,286 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 294 selfloop transitions, 84 changer transitions 0/378 dead transitions. [2022-12-13 15:00:22,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 378 transitions, 7782 flow [2022-12-13 15:00:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:00:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 15:00:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3375 transitions. [2022-12-13 15:00:22,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4344188441240829 [2022-12-13 15:00:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3375 transitions. [2022-12-13 15:00:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3375 transitions. [2022-12-13 15:00:22,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:22,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3375 transitions. [2022-12-13 15:00:22,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 198.52941176470588) internal successors, (3375), 17 states have internal predecessors, (3375), 0 states have call successors, (0), 0 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 15:00:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 457.0) internal successors, (8226), 18 states have internal predecessors, (8226), 0 states have call successors, (0), 0 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 15:00:22,296 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 457.0) internal successors, (8226), 18 states have internal predecessors, (8226), 0 states have call successors, (0), 0 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 15:00:22,296 INFO L175 Difference]: Start difference. First operand has 222 places, 277 transitions, 5164 flow. Second operand 17 states and 3375 transitions. [2022-12-13 15:00:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 378 transitions, 7782 flow [2022-12-13 15:00:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 378 transitions, 6694 flow, removed 426 selfloop flow, removed 11 redundant places. [2022-12-13 15:00:22,456 INFO L231 Difference]: Finished difference. Result has 232 places, 320 transitions, 5615 flow [2022-12-13 15:00:22,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5615, PETRI_PLACES=232, PETRI_TRANSITIONS=320} [2022-12-13 15:00:22,457 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2022-12-13 15:00:22,457 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 320 transitions, 5615 flow [2022-12-13 15:00:22,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:00:22,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:22,457 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:22,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 15:00:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:00:22,659 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -858476172, now seen corresponding path program 19 times [2022-12-13 15:00:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637160338] [2022-12-13 15:00:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:22,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637160338] [2022-12-13 15:00:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637160338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000253741] [2022-12-13 15:00:22,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:00:22,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:22,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:22,728 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:22,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:00:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:22,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:22,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000253741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:22,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:22,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 15:00:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155718003] [2022-12-13 15:00:22,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:22,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:00:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:00:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:00:22,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:22,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 320 transitions, 5615 flow. Second operand has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 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 15:00:22,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:22,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:22,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:23,631 INFO L130 PetriNetUnfolder]: 960/1947 cut-off events. [2022-12-13 15:00:23,631 INFO L131 PetriNetUnfolder]: For 47500/47500 co-relation queries the response was YES. [2022-12-13 15:00:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15636 conditions, 1947 events. 960/1947 cut-off events. For 47500/47500 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12988 event pairs, 154 based on Foata normal form. 20/1967 useless extension candidates. Maximal degree in co-relation 15549. Up to 640 conditions per place. [2022-12-13 15:00:23,645 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 278 selfloop transitions, 154 changer transitions 4/436 dead transitions. [2022-12-13 15:00:23,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 436 transitions, 8203 flow [2022-12-13 15:00:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:00:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:00:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4557 transitions. [2022-12-13 15:00:23,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335458091523166 [2022-12-13 15:00:23,648 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4557 transitions. [2022-12-13 15:00:23,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4557 transitions. [2022-12-13 15:00:23,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:23,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4557 transitions. [2022-12-13 15:00:23,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 198.1304347826087) internal successors, (4557), 23 states have internal predecessors, (4557), 0 states have call successors, (0), 0 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 15:00:23,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:00:23,657 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:00:23,657 INFO L175 Difference]: Start difference. First operand has 232 places, 320 transitions, 5615 flow. Second operand 23 states and 4557 transitions. [2022-12-13 15:00:23,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 436 transitions, 8203 flow [2022-12-13 15:00:23,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 436 transitions, 7806 flow, removed 176 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:23,881 INFO L231 Difference]: Finished difference. Result has 260 places, 369 transitions, 7058 flow [2022-12-13 15:00:23,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7058, PETRI_PLACES=260, PETRI_TRANSITIONS=369} [2022-12-13 15:00:23,881 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2022-12-13 15:00:23,881 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 369 transitions, 7058 flow [2022-12-13 15:00:23,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.73333333333332) internal successors, (2921), 15 states have internal predecessors, (2921), 0 states have call successors, (0), 0 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 15:00:23,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:23,882 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:23,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:24,083 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -257716917, now seen corresponding path program 20 times [2022-12-13 15:00:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319767479] [2022-12-13 15:00:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319767479] [2022-12-13 15:00:24,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319767479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890599982] [2022-12-13 15:00:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:24,175 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:24,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:00:24,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:24,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:24,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890599982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:24,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:24,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869800764] [2022-12-13 15:00:24,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:24,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:24,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:24,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 369 transitions, 7058 flow. Second operand has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 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 15:00:24,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:24,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:24,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:25,125 INFO L130 PetriNetUnfolder]: 937/1898 cut-off events. [2022-12-13 15:00:25,125 INFO L131 PetriNetUnfolder]: For 52163/52163 co-relation queries the response was YES. [2022-12-13 15:00:25,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15959 conditions, 1898 events. 937/1898 cut-off events. For 52163/52163 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12536 event pairs, 28 based on Foata normal form. 16/1914 useless extension candidates. Maximal degree in co-relation 15861. Up to 907 conditions per place. [2022-12-13 15:00:25,140 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 271 selfloop transitions, 156 changer transitions 1/428 dead transitions. [2022-12-13 15:00:25,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 428 transitions, 8649 flow [2022-12-13 15:00:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:00:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:00:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4149 transitions. [2022-12-13 15:00:25,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.432322600812754 [2022-12-13 15:00:25,144 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4149 transitions. [2022-12-13 15:00:25,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4149 transitions. [2022-12-13 15:00:25,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:25,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4149 transitions. [2022-12-13 15:00:25,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 197.57142857142858) internal successors, (4149), 21 states have internal predecessors, (4149), 0 states have call successors, (0), 0 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 15:00:25,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 457.0) internal successors, (10054), 22 states have internal predecessors, (10054), 0 states have call successors, (0), 0 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 15:00:25,151 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 457.0) internal successors, (10054), 22 states have internal predecessors, (10054), 0 states have call successors, (0), 0 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 15:00:25,151 INFO L175 Difference]: Start difference. First operand has 260 places, 369 transitions, 7058 flow. Second operand 21 states and 4149 transitions. [2022-12-13 15:00:25,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 428 transitions, 8649 flow [2022-12-13 15:00:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 428 transitions, 7706 flow, removed 413 selfloop flow, removed 7 redundant places. [2022-12-13 15:00:25,458 INFO L231 Difference]: Finished difference. Result has 276 places, 379 transitions, 6738 flow [2022-12-13 15:00:25,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6738, PETRI_PLACES=276, PETRI_TRANSITIONS=379} [2022-12-13 15:00:25,458 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2022-12-13 15:00:25,458 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 379 transitions, 6738 flow [2022-12-13 15:00:25,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.07692307692307) internal successors, (2536), 13 states have internal predecessors, (2536), 0 states have call successors, (0), 0 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 15:00:25,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:25,459 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:25,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 15:00:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:25,660 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1160461905, now seen corresponding path program 21 times [2022-12-13 15:00:25,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40411380] [2022-12-13 15:00:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40411380] [2022-12-13 15:00:25,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40411380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839029114] [2022-12-13 15:00:25,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:25,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:25,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:25,719 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:00:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:00:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:25,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:25,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839029114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:25,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:25,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 15:00:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975891622] [2022-12-13 15:00:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:00:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:00:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:00:25,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:25,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 379 transitions, 6738 flow. Second operand has 11 states, 11 states have (on average 195.1818181818182) internal successors, (2147), 11 states have internal predecessors, (2147), 0 states have call successors, (0), 0 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 15:00:25,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:25,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:26,527 INFO L130 PetriNetUnfolder]: 999/2002 cut-off events. [2022-12-13 15:00:26,527 INFO L131 PetriNetUnfolder]: For 45725/45725 co-relation queries the response was YES. [2022-12-13 15:00:26,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 2002 events. 999/2002 cut-off events. For 45725/45725 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 13291 event pairs, 34 based on Foata normal form. 16/2018 useless extension candidates. Maximal degree in co-relation 16199. Up to 1404 conditions per place. [2022-12-13 15:00:26,542 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 321 selfloop transitions, 112 changer transitions 0/433 dead transitions. [2022-12-13 15:00:26,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 433 transitions, 8569 flow [2022-12-13 15:00:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:00:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:00:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1398 transitions. [2022-12-13 15:00:26,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370115661144108 [2022-12-13 15:00:26,543 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1398 transitions. [2022-12-13 15:00:26,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1398 transitions. [2022-12-13 15:00:26,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:26,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1398 transitions. [2022-12-13 15:00:26,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.71428571428572) internal successors, (1398), 7 states have internal predecessors, (1398), 0 states have call successors, (0), 0 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 15:00:26,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:26,546 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 457.0) internal successors, (3656), 8 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 15:00:26,546 INFO L175 Difference]: Start difference. First operand has 276 places, 379 transitions, 6738 flow. Second operand 7 states and 1398 transitions. [2022-12-13 15:00:26,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 433 transitions, 8569 flow [2022-12-13 15:00:26,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 433 transitions, 8330 flow, removed 28 selfloop flow, removed 11 redundant places. [2022-12-13 15:00:26,815 INFO L231 Difference]: Finished difference. Result has 275 places, 398 transitions, 7365 flow [2022-12-13 15:00:26,815 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=6443, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7365, PETRI_PLACES=275, PETRI_TRANSITIONS=398} [2022-12-13 15:00:26,815 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2022-12-13 15:00:26,815 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 398 transitions, 7365 flow [2022-12-13 15:00:26,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.1818181818182) internal successors, (2147), 11 states have internal predecessors, (2147), 0 states have call successors, (0), 0 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 15:00:26,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:26,816 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:26,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:27,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 15:00:27,017 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 113044881, now seen corresponding path program 22 times [2022-12-13 15:00:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:27,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618438039] [2022-12-13 15:00:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:27,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618438039] [2022-12-13 15:00:27,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618438039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:27,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900984199] [2022-12-13 15:00:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:27,085 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:27,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:00:27,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:27,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:27,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:27,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:27,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:27,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900984199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:27,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:27,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:27,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191100417] [2022-12-13 15:00:27,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:27,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:27,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:27,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:27,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 398 transitions, 7365 flow. Second operand has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 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 15:00:27,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:27,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:27,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:28,082 INFO L130 PetriNetUnfolder]: 1115/2256 cut-off events. [2022-12-13 15:00:28,082 INFO L131 PetriNetUnfolder]: For 58492/58492 co-relation queries the response was YES. [2022-12-13 15:00:28,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18938 conditions, 2256 events. 1115/2256 cut-off events. For 58492/58492 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15493 event pairs, 56 based on Foata normal form. 12/2268 useless extension candidates. Maximal degree in co-relation 18837. Up to 1320 conditions per place. [2022-12-13 15:00:28,103 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 338 selfloop transitions, 155 changer transitions 0/493 dead transitions. [2022-12-13 15:00:28,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 493 transitions, 9911 flow [2022-12-13 15:00:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:00:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:00:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2989 transitions. [2022-12-13 15:00:28,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43603209336250914 [2022-12-13 15:00:28,105 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2989 transitions. [2022-12-13 15:00:28,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2989 transitions. [2022-12-13 15:00:28,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:28,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2989 transitions. [2022-12-13 15:00:28,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.26666666666668) internal successors, (2989), 15 states have internal predecessors, (2989), 0 states have call successors, (0), 0 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 15:00:28,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 15:00:28,110 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 457.0) internal successors, (7312), 16 states have internal predecessors, (7312), 0 states have call successors, (0), 0 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 15:00:28,110 INFO L175 Difference]: Start difference. First operand has 275 places, 398 transitions, 7365 flow. Second operand 15 states and 2989 transitions. [2022-12-13 15:00:28,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 493 transitions, 9911 flow [2022-12-13 15:00:28,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 493 transitions, 9835 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-12-13 15:00:28,452 INFO L231 Difference]: Finished difference. Result has 291 places, 427 transitions, 8532 flow [2022-12-13 15:00:28,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=7295, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8532, PETRI_PLACES=291, PETRI_TRANSITIONS=427} [2022-12-13 15:00:28,453 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2022-12-13 15:00:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 427 transitions, 8532 flow [2022-12-13 15:00:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 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 15:00:28,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:28,453 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:28,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 15:00:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:28,654 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -821608120, now seen corresponding path program 23 times [2022-12-13 15:00:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:28,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634943008] [2022-12-13 15:00:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634943008] [2022-12-13 15:00:28,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634943008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962990281] [2022-12-13 15:00:28,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:28,737 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:28,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:00:28,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:00:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:28,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:28,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:28,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:28,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962990281] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:28,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:28,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740947718] [2022-12-13 15:00:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:28,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:28,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 427 transitions, 8532 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:28,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:28,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:28,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:29,716 INFO L130 PetriNetUnfolder]: 1151/2318 cut-off events. [2022-12-13 15:00:29,716 INFO L131 PetriNetUnfolder]: For 66907/66907 co-relation queries the response was YES. [2022-12-13 15:00:29,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 2318 events. 1151/2318 cut-off events. For 66907/66907 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16036 event pairs, 206 based on Foata normal form. 8/2326 useless extension candidates. Maximal degree in co-relation 20253. Up to 904 conditions per place. [2022-12-13 15:00:29,737 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 343 selfloop transitions, 151 changer transitions 1/495 dead transitions. [2022-12-13 15:00:29,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 495 transitions, 10215 flow [2022-12-13 15:00:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:00:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:00:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3575 transitions. [2022-12-13 15:00:29,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43459761731096525 [2022-12-13 15:00:29,740 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3575 transitions. [2022-12-13 15:00:29,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3575 transitions. [2022-12-13 15:00:29,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:29,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3575 transitions. [2022-12-13 15:00:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.61111111111111) internal successors, (3575), 18 states have internal predecessors, (3575), 0 states have call successors, (0), 0 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 15:00:29,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:29,746 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:29,746 INFO L175 Difference]: Start difference. First operand has 291 places, 427 transitions, 8532 flow. Second operand 18 states and 3575 transitions. [2022-12-13 15:00:29,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 495 transitions, 10215 flow [2022-12-13 15:00:30,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 495 transitions, 9902 flow, removed 122 selfloop flow, removed 9 redundant places. [2022-12-13 15:00:30,215 INFO L231 Difference]: Finished difference. Result has 305 places, 440 transitions, 8993 flow [2022-12-13 15:00:30,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=8161, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8993, PETRI_PLACES=305, PETRI_TRANSITIONS=440} [2022-12-13 15:00:30,216 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2022-12-13 15:00:30,216 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 440 transitions, 8993 flow [2022-12-13 15:00:30,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:30,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:30,216 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:30,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 15:00:30,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:30,417 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1745501134, now seen corresponding path program 24 times [2022-12-13 15:00:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:30,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827911398] [2022-12-13 15:00:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827911398] [2022-12-13 15:00:30,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827911398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:30,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113386682] [2022-12-13 15:00:30,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:30,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:30,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:30,509 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:30,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 15:00:30,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:00:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:30,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:00:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113386682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:30,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:30,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446563334] [2022-12-13 15:00:30,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:30,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:30,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 440 transitions, 8993 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:30,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:30,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:31,420 INFO L130 PetriNetUnfolder]: 1125/2264 cut-off events. [2022-12-13 15:00:31,420 INFO L131 PetriNetUnfolder]: For 70803/70803 co-relation queries the response was YES. [2022-12-13 15:00:31,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20544 conditions, 2264 events. 1125/2264 cut-off events. For 70803/70803 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15509 event pairs, 395 based on Foata normal form. 34/2298 useless extension candidates. Maximal degree in co-relation 20435. Up to 2029 conditions per place. [2022-12-13 15:00:31,439 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 413 selfloop transitions, 49 changer transitions 0/462 dead transitions. [2022-12-13 15:00:31,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 462 transitions, 10080 flow [2022-12-13 15:00:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:00:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:00:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2190 transitions. [2022-12-13 15:00:31,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4356475034812015 [2022-12-13 15:00:31,441 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2190 transitions. [2022-12-13 15:00:31,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2190 transitions. [2022-12-13 15:00:31,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:31,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2190 transitions. [2022-12-13 15:00:31,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 199.0909090909091) internal successors, (2190), 11 states have internal predecessors, (2190), 0 states have call successors, (0), 0 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 15:00:31,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:31,445 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:31,445 INFO L175 Difference]: Start difference. First operand has 305 places, 440 transitions, 8993 flow. Second operand 11 states and 2190 transitions. [2022-12-13 15:00:31,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 462 transitions, 10080 flow [2022-12-13 15:00:31,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 462 transitions, 9988 flow, removed 24 selfloop flow, removed 7 redundant places. [2022-12-13 15:00:31,853 INFO L231 Difference]: Finished difference. Result has 305 places, 429 transitions, 8810 flow [2022-12-13 15:00:31,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8810, PETRI_PLACES=305, PETRI_TRANSITIONS=429} [2022-12-13 15:00:31,853 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2022-12-13 15:00:31,854 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 429 transitions, 8810 flow [2022-12-13 15:00:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:31,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:31,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:31,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 15:00:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:00:32,055 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1587291856, now seen corresponding path program 25 times [2022-12-13 15:00:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:32,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695383036] [2022-12-13 15:00:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:32,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695383036] [2022-12-13 15:00:32,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695383036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964471806] [2022-12-13 15:00:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:00:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:32,139 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:32,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 15:00:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:32,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964471806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:32,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 15:00:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864938962] [2022-12-13 15:00:32,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:32,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:32,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:32,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 429 transitions, 8810 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:32,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:32,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:32,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:33,217 INFO L130 PetriNetUnfolder]: 1125/2276 cut-off events. [2022-12-13 15:00:33,217 INFO L131 PetriNetUnfolder]: For 70660/70660 co-relation queries the response was YES. [2022-12-13 15:00:33,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20766 conditions, 2276 events. 1125/2276 cut-off events. For 70660/70660 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 15765 event pairs, 179 based on Foata normal form. 4/2280 useless extension candidates. Maximal degree in co-relation 20655. Up to 789 conditions per place. [2022-12-13 15:00:33,237 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 305 selfloop transitions, 177 changer transitions 3/485 dead transitions. [2022-12-13 15:00:33,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 485 transitions, 10442 flow [2022-12-13 15:00:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:00:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:00:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3565 transitions. [2022-12-13 15:00:33,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43338195964016535 [2022-12-13 15:00:33,240 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3565 transitions. [2022-12-13 15:00:33,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3565 transitions. [2022-12-13 15:00:33,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:33,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3565 transitions. [2022-12-13 15:00:33,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.05555555555554) internal successors, (3565), 18 states have internal predecessors, (3565), 0 states have call successors, (0), 0 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 15:00:33,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:33,247 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:33,247 INFO L175 Difference]: Start difference. First operand has 305 places, 429 transitions, 8810 flow. Second operand 18 states and 3565 transitions. [2022-12-13 15:00:33,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 485 transitions, 10442 flow [2022-12-13 15:00:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 485 transitions, 10224 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-12-13 15:00:33,709 INFO L231 Difference]: Finished difference. Result has 317 places, 434 transitions, 9229 flow [2022-12-13 15:00:33,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=8595, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9229, PETRI_PLACES=317, PETRI_TRANSITIONS=434} [2022-12-13 15:00:33,709 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 297 predicate places. [2022-12-13 15:00:33,709 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 434 transitions, 9229 flow [2022-12-13 15:00:33,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:33,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:33,710 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:33,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:33,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 15:00:33,911 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1558844467, now seen corresponding path program 26 times [2022-12-13 15:00:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246539402] [2022-12-13 15:00:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:33,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246539402] [2022-12-13 15:00:33,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246539402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165967404] [2022-12-13 15:00:33,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:33,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:33,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:34,000 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:34,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 15:00:34,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:34,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:34,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:34,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165967404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:34,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:34,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 15:00:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121383320] [2022-12-13 15:00:34,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:34,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:34,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:34,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:34,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 434 transitions, 9229 flow. Second operand has 13 states, 13 states have (on average 195.23076923076923) internal successors, (2538), 13 states have internal predecessors, (2538), 0 states have call successors, (0), 0 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 15:00:34,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:34,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:34,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:34,954 INFO L130 PetriNetUnfolder]: 1160/2323 cut-off events. [2022-12-13 15:00:34,954 INFO L131 PetriNetUnfolder]: For 74478/74478 co-relation queries the response was YES. [2022-12-13 15:00:34,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21836 conditions, 2323 events. 1160/2323 cut-off events. For 74478/74478 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 15895 event pairs, 80 based on Foata normal form. 6/2329 useless extension candidates. Maximal degree in co-relation 21723. Up to 2029 conditions per place. [2022-12-13 15:00:34,975 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 388 selfloop transitions, 86 changer transitions 0/474 dead transitions. [2022-12-13 15:00:34,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 474 transitions, 10841 flow [2022-12-13 15:00:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:00:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:00:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2179 transitions. [2022-12-13 15:00:34,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43345931967376167 [2022-12-13 15:00:34,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2179 transitions. [2022-12-13 15:00:34,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2179 transitions. [2022-12-13 15:00:34,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:34,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2179 transitions. [2022-12-13 15:00:34,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 198.0909090909091) internal successors, (2179), 11 states have internal predecessors, (2179), 0 states have call successors, (0), 0 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 15:00:35,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:35,000 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:00:35,001 INFO L175 Difference]: Start difference. First operand has 317 places, 434 transitions, 9229 flow. Second operand 11 states and 2179 transitions. [2022-12-13 15:00:35,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 474 transitions, 10841 flow [2022-12-13 15:00:35,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 474 transitions, 10494 flow, removed 67 selfloop flow, removed 10 redundant places. [2022-12-13 15:00:35,433 INFO L231 Difference]: Finished difference. Result has 317 places, 451 transitions, 9459 flow [2022-12-13 15:00:35,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9459, PETRI_PLACES=317, PETRI_TRANSITIONS=451} [2022-12-13 15:00:35,433 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 297 predicate places. [2022-12-13 15:00:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 451 transitions, 9459 flow [2022-12-13 15:00:35,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 195.23076923076923) internal successors, (2538), 13 states have internal predecessors, (2538), 0 states have call successors, (0), 0 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 15:00:35,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:35,434 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:35,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 15:00:35,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 15:00:35,635 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash -315358668, now seen corresponding path program 27 times [2022-12-13 15:00:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828490177] [2022-12-13 15:00:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828490177] [2022-12-13 15:00:35,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828490177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009656428] [2022-12-13 15:00:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:35,716 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:35,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 15:00:35,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:00:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:35,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009656428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:35,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:35,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 15:00:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773419616] [2022-12-13 15:00:35,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:00:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:00:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:00:35,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:35,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 451 transitions, 9459 flow. Second operand has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:35,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:35,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:35,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:37,001 INFO L130 PetriNetUnfolder]: 1258/2537 cut-off events. [2022-12-13 15:00:37,001 INFO L131 PetriNetUnfolder]: For 84368/84368 co-relation queries the response was YES. [2022-12-13 15:00:37,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24123 conditions, 2537 events. 1258/2537 cut-off events. For 84368/84368 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 17922 event pairs, 360 based on Foata normal form. 24/2561 useless extension candidates. Maximal degree in co-relation 24007. Up to 1864 conditions per place. [2022-12-13 15:00:37,024 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 427 selfloop transitions, 101 changer transitions 0/528 dead transitions. [2022-12-13 15:00:37,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 528 transitions, 11996 flow [2022-12-13 15:00:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:00:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:00:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2390 transitions. [2022-12-13 15:00:37,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43581327498176514 [2022-12-13 15:00:37,026 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2390 transitions. [2022-12-13 15:00:37,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2390 transitions. [2022-12-13 15:00:37,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:37,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2390 transitions. [2022-12-13 15:00:37,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.16666666666666) internal successors, (2390), 12 states have internal predecessors, (2390), 0 states have call successors, (0), 0 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 15:00:37,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:37,030 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:37,030 INFO L175 Difference]: Start difference. First operand has 317 places, 451 transitions, 9459 flow. Second operand 12 states and 2390 transitions. [2022-12-13 15:00:37,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 528 transitions, 11996 flow [2022-12-13 15:00:37,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 528 transitions, 11867 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:37,508 INFO L231 Difference]: Finished difference. Result has 324 places, 475 transitions, 10325 flow [2022-12-13 15:00:37,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=9263, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10325, PETRI_PLACES=324, PETRI_TRANSITIONS=475} [2022-12-13 15:00:37,509 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 304 predicate places. [2022-12-13 15:00:37,509 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 475 transitions, 10325 flow [2022-12-13 15:00:37,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.92307692307693) internal successors, (2534), 13 states have internal predecessors, (2534), 0 states have call successors, (0), 0 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 15:00:37,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:37,509 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:37,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 15:00:37,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:00:37,710 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1618336691, now seen corresponding path program 28 times [2022-12-13 15:00:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631707361] [2022-12-13 15:00:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631707361] [2022-12-13 15:00:37,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631707361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601803464] [2022-12-13 15:00:37,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:37,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:37,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:37,794 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:37,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 15:00:37,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:37,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:37,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601803464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:37,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:37,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031786190] [2022-12-13 15:00:37,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:37,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:37,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:37,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 475 transitions, 10325 flow. Second operand has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 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 15:00:37,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:37,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:37,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:39,100 INFO L130 PetriNetUnfolder]: 1290/2603 cut-off events. [2022-12-13 15:00:39,100 INFO L131 PetriNetUnfolder]: For 90138/90138 co-relation queries the response was YES. [2022-12-13 15:00:39,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25267 conditions, 2603 events. 1290/2603 cut-off events. For 90138/90138 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18347 event pairs, 86 based on Foata normal form. 8/2611 useless extension candidates. Maximal degree in co-relation 25149. Up to 1962 conditions per place. [2022-12-13 15:00:39,122 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 385 selfloop transitions, 145 changer transitions 0/530 dead transitions. [2022-12-13 15:00:39,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 530 transitions, 12121 flow [2022-12-13 15:00:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:00:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:00:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2786 transitions. [2022-12-13 15:00:39,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2022-12-13 15:00:39,124 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2786 transitions. [2022-12-13 15:00:39,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2786 transitions. [2022-12-13 15:00:39,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:39,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2786 transitions. [2022-12-13 15:00:39,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.0) internal successors, (2786), 14 states have internal predecessors, (2786), 0 states have call successors, (0), 0 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 15:00:39,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:00:39,128 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:00:39,128 INFO L175 Difference]: Start difference. First operand has 324 places, 475 transitions, 10325 flow. Second operand 14 states and 2786 transitions. [2022-12-13 15:00:39,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 530 transitions, 12121 flow [2022-12-13 15:00:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 530 transitions, 11823 flow, removed 96 selfloop flow, removed 7 redundant places. [2022-12-13 15:00:39,649 INFO L231 Difference]: Finished difference. Result has 332 places, 484 transitions, 10648 flow [2022-12-13 15:00:39,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10648, PETRI_PLACES=332, PETRI_TRANSITIONS=484} [2022-12-13 15:00:39,649 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 312 predicate places. [2022-12-13 15:00:39,650 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 484 transitions, 10648 flow [2022-12-13 15:00:39,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 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 15:00:39,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:39,650 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:39,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:39,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:00:39,851 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash 881138184, now seen corresponding path program 29 times [2022-12-13 15:00:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:39,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182918971] [2022-12-13 15:00:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:39,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:39,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182918971] [2022-12-13 15:00:39,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182918971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:39,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758599558] [2022-12-13 15:00:39,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:39,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:39,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:39,910 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:39,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 15:00:39,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:00:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:40,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:40,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758599558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:40,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:40,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:40,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421376781] [2022-12-13 15:00:40,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:40,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:40,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:40,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:40,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 484 transitions, 10648 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:40,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:40,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:41,295 INFO L130 PetriNetUnfolder]: 1358/2759 cut-off events. [2022-12-13 15:00:41,295 INFO L131 PetriNetUnfolder]: For 100436/100436 co-relation queries the response was YES. [2022-12-13 15:00:41,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27181 conditions, 2759 events. 1358/2759 cut-off events. For 100436/100436 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 19914 event pairs, 302 based on Foata normal form. 12/2771 useless extension candidates. Maximal degree in co-relation 27061. Up to 1628 conditions per place. [2022-12-13 15:00:41,319 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 382 selfloop transitions, 180 changer transitions 0/562 dead transitions. [2022-12-13 15:00:41,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 562 transitions, 13337 flow [2022-12-13 15:00:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:00:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 15:00:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2597 transitions. [2022-12-13 15:00:41,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371317959939404 [2022-12-13 15:00:41,321 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2597 transitions. [2022-12-13 15:00:41,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2597 transitions. [2022-12-13 15:00:41,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:41,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2597 transitions. [2022-12-13 15:00:41,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 199.76923076923077) internal successors, (2597), 13 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 15:00:41,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 457.0) internal successors, (6398), 14 states have internal predecessors, (6398), 0 states have call successors, (0), 0 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 15:00:41,326 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 457.0) internal successors, (6398), 14 states have internal predecessors, (6398), 0 states have call successors, (0), 0 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 15:00:41,326 INFO L175 Difference]: Start difference. First operand has 332 places, 484 transitions, 10648 flow. Second operand 13 states and 2597 transitions. [2022-12-13 15:00:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 562 transitions, 13337 flow [2022-12-13 15:00:41,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 562 transitions, 13159 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-12-13 15:00:41,925 INFO L231 Difference]: Finished difference. Result has 334 places, 500 transitions, 11599 flow [2022-12-13 15:00:41,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=10400, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11599, PETRI_PLACES=334, PETRI_TRANSITIONS=500} [2022-12-13 15:00:41,925 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2022-12-13 15:00:41,925 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 500 transitions, 11599 flow [2022-12-13 15:00:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:41,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:41,926 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:41,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:42,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:00:42,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash 938779935, now seen corresponding path program 30 times [2022-12-13 15:00:42,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:42,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494079036] [2022-12-13 15:00:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:42,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:42,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494079036] [2022-12-13 15:00:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494079036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740986874] [2022-12-13 15:00:42,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:42,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:42,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:42,208 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:42,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 15:00:42,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:00:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:42,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:42,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:42,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740986874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:42,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:42,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:42,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786979120] [2022-12-13 15:00:42,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:42,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:42,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:42,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:42,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 500 transitions, 11599 flow. Second operand has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 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 15:00:42,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:42,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:42,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:43,580 INFO L130 PetriNetUnfolder]: 1340/2711 cut-off events. [2022-12-13 15:00:43,580 INFO L131 PetriNetUnfolder]: For 106948/106948 co-relation queries the response was YES. [2022-12-13 15:00:43,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 2711 events. 1340/2711 cut-off events. For 106948/106948 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19373 event pairs, 46 based on Foata normal form. 12/2723 useless extension candidates. Maximal degree in co-relation 27515. Up to 1208 conditions per place. [2022-12-13 15:00:43,631 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 329 selfloop transitions, 216 changer transitions 4/549 dead transitions. [2022-12-13 15:00:43,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 549 transitions, 13522 flow [2022-12-13 15:00:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:00:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:00:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3753 transitions. [2022-12-13 15:00:43,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43222388575377174 [2022-12-13 15:00:43,633 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3753 transitions. [2022-12-13 15:00:43,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3753 transitions. [2022-12-13 15:00:43,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:43,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3753 transitions. [2022-12-13 15:00:43,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 197.52631578947367) internal successors, (3753), 19 states have internal predecessors, (3753), 0 states have call successors, (0), 0 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 15:00:43,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 457.0) internal successors, (9140), 20 states have internal predecessors, (9140), 0 states have call successors, (0), 0 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 15:00:43,639 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 457.0) internal successors, (9140), 20 states have internal predecessors, (9140), 0 states have call successors, (0), 0 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 15:00:43,640 INFO L175 Difference]: Start difference. First operand has 334 places, 500 transitions, 11599 flow. Second operand 19 states and 3753 transitions. [2022-12-13 15:00:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 549 transitions, 13522 flow [2022-12-13 15:00:44,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 549 transitions, 13170 flow, removed 129 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:44,271 INFO L231 Difference]: Finished difference. Result has 346 places, 500 transitions, 11798 flow [2022-12-13 15:00:44,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=11176, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11798, PETRI_PLACES=346, PETRI_TRANSITIONS=500} [2022-12-13 15:00:44,271 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2022-12-13 15:00:44,271 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 500 transitions, 11798 flow [2022-12-13 15:00:44,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 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 15:00:44,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:44,272 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:44,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 15:00:44,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 15:00:44,473 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1685971070, now seen corresponding path program 31 times [2022-12-13 15:00:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538788608] [2022-12-13 15:00:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538788608] [2022-12-13 15:00:44,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538788608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687722172] [2022-12-13 15:00:44,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:00:44,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:44,544 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 15:00:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:44,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:44,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:44,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687722172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:44,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:44,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 15:00:44,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524886537] [2022-12-13 15:00:44,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:44,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:00:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:00:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:00:44,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:44,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 500 transitions, 11798 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:44,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:44,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:45,936 INFO L130 PetriNetUnfolder]: 1329/2688 cut-off events. [2022-12-13 15:00:45,936 INFO L131 PetriNetUnfolder]: For 104536/104536 co-relation queries the response was YES. [2022-12-13 15:00:45,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28028 conditions, 2688 events. 1329/2688 cut-off events. For 104536/104536 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19229 event pairs, 191 based on Foata normal form. 10/2698 useless extension candidates. Maximal degree in co-relation 27905. Up to 811 conditions per place. [2022-12-13 15:00:45,962 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 342 selfloop transitions, 216 changer transitions 2/560 dead transitions. [2022-12-13 15:00:45,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 560 transitions, 13835 flow [2022-12-13 15:00:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:00:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:00:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3567 transitions. [2022-12-13 15:00:45,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336250911743253 [2022-12-13 15:00:45,965 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3567 transitions. [2022-12-13 15:00:45,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3567 transitions. [2022-12-13 15:00:45,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:45,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3567 transitions. [2022-12-13 15:00:45,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.16666666666666) internal successors, (3567), 18 states have internal predecessors, (3567), 0 states have call successors, (0), 0 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 15:00:45,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:45,973 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 457.0) internal successors, (8683), 19 states have internal predecessors, (8683), 0 states have call successors, (0), 0 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 15:00:45,973 INFO L175 Difference]: Start difference. First operand has 346 places, 500 transitions, 11798 flow. Second operand 18 states and 3567 transitions. [2022-12-13 15:00:45,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 560 transitions, 13835 flow [2022-12-13 15:00:46,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 560 transitions, 13628 flow, removed 21 selfloop flow, removed 12 redundant places. [2022-12-13 15:00:46,666 INFO L231 Difference]: Finished difference. Result has 348 places, 503 transitions, 12201 flow [2022-12-13 15:00:46,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12201, PETRI_PLACES=348, PETRI_TRANSITIONS=503} [2022-12-13 15:00:46,666 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2022-12-13 15:00:46,666 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 503 transitions, 12201 flow [2022-12-13 15:00:46,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 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 15:00:46,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:46,667 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:46,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-13 15:00:46,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 15:00:46,868 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash 63975304, now seen corresponding path program 32 times [2022-12-13 15:00:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:46,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610386020] [2022-12-13 15:00:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:46,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610386020] [2022-12-13 15:00:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610386020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438084504] [2022-12-13 15:00:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:00:46,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:46,928 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:46,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 15:00:47,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:00:47,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:00:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:47,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438084504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:47,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:47,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 15:00:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710425918] [2022-12-13 15:00:47,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:00:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:00:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:00:47,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:00:47,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 503 transitions, 12201 flow. Second operand has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 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 15:00:47,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:47,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:00:47,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:48,023 INFO L130 PetriNetUnfolder]: 1324/2673 cut-off events. [2022-12-13 15:00:48,023 INFO L131 PetriNetUnfolder]: For 105638/105638 co-relation queries the response was YES. [2022-12-13 15:00:48,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28496 conditions, 2673 events. 1324/2673 cut-off events. For 105638/105638 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19034 event pairs, 286 based on Foata normal form. 2/2675 useless extension candidates. Maximal degree in co-relation 28373. Up to 1262 conditions per place. [2022-12-13 15:00:48,050 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 380 selfloop transitions, 135 changer transitions 6/521 dead transitions. [2022-12-13 15:00:48,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 521 transitions, 13451 flow [2022-12-13 15:00:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:00:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:00:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1976 transitions. [2022-12-13 15:00:48,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4323851203501094 [2022-12-13 15:00:48,052 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1976 transitions. [2022-12-13 15:00:48,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1976 transitions. [2022-12-13 15:00:48,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:48,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1976 transitions. [2022-12-13 15:00:48,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 197.6) internal successors, (1976), 10 states have internal predecessors, (1976), 0 states have call successors, (0), 0 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 15:00:48,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 457.0) internal successors, (5027), 11 states have internal predecessors, (5027), 0 states have call successors, (0), 0 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 15:00:48,055 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 457.0) internal successors, (5027), 11 states have internal predecessors, (5027), 0 states have call successors, (0), 0 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 15:00:48,055 INFO L175 Difference]: Start difference. First operand has 348 places, 503 transitions, 12201 flow. Second operand 10 states and 1976 transitions. [2022-12-13 15:00:48,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 521 transitions, 13451 flow [2022-12-13 15:00:48,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 521 transitions, 13080 flow, removed 108 selfloop flow, removed 10 redundant places. [2022-12-13 15:00:48,769 INFO L231 Difference]: Finished difference. Result has 345 places, 499 transitions, 12004 flow [2022-12-13 15:00:48,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12004, PETRI_PLACES=345, PETRI_TRANSITIONS=499} [2022-12-13 15:00:48,770 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2022-12-13 15:00:48,770 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 499 transitions, 12004 flow [2022-12-13 15:00:48,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.0909090909091) internal successors, (2146), 11 states have internal predecessors, (2146), 0 states have call successors, (0), 0 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 15:00:48,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:48,770 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:48,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 15:00:48,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:48,971 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash -243440382, now seen corresponding path program 33 times [2022-12-13 15:00:48,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571581394] [2022-12-13 15:00:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:49,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571581394] [2022-12-13 15:00:49,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571581394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320403097] [2022-12-13 15:00:49,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:00:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:49,398 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:49,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 15:00:49,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:00:49,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:00:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320403097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-12-13 15:00:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367218776] [2022-12-13 15:00:49,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:49,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:00:49,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:00:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:00:50,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 457 [2022-12-13 15:00:50,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 499 transitions, 12004 flow. Second operand has 21 states, 21 states have (on average 182.0) internal successors, (3822), 21 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 15:00:50,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:50,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 457 [2022-12-13 15:00:50,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:51,654 INFO L130 PetriNetUnfolder]: 1524/3109 cut-off events. [2022-12-13 15:00:51,654 INFO L131 PetriNetUnfolder]: For 120159/120161 co-relation queries the response was YES. [2022-12-13 15:00:51,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32912 conditions, 3109 events. 1524/3109 cut-off events. For 120159/120161 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 23047 event pairs, 99 based on Foata normal form. 5/3114 useless extension candidates. Maximal degree in co-relation 32789. Up to 2502 conditions per place. [2022-12-13 15:00:51,687 INFO L137 encePairwiseOnDemand]: 450/457 looper letters, 508 selfloop transitions, 109 changer transitions 14/636 dead transitions. [2022-12-13 15:00:51,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 636 transitions, 15754 flow [2022-12-13 15:00:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:00:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:00:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-12-13 15:00:51,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40919037199124725 [2022-12-13 15:00:51,689 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-12-13 15:00:51,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-12-13 15:00:51,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:51,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-12-13 15:00:51,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 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 15:00:51,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:51,694 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:51,694 INFO L175 Difference]: Start difference. First operand has 345 places, 499 transitions, 12004 flow. Second operand 12 states and 2244 transitions. [2022-12-13 15:00:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 636 transitions, 15754 flow [2022-12-13 15:00:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 636 transitions, 15396 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-12-13 15:00:52,466 INFO L231 Difference]: Finished difference. Result has 354 places, 562 transitions, 13789 flow [2022-12-13 15:00:52,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=11732, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13789, PETRI_PLACES=354, PETRI_TRANSITIONS=562} [2022-12-13 15:00:52,466 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2022-12-13 15:00:52,466 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 562 transitions, 13789 flow [2022-12-13 15:00:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.0) internal successors, (3822), 21 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 15:00:52,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:52,467 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:52,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 15:00:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 15:00:52,668 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 397134210, now seen corresponding path program 34 times [2022-12-13 15:00:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:52,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263668581] [2022-12-13 15:00:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:52,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263668581] [2022-12-13 15:00:52,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263668581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:52,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598637318] [2022-12-13 15:00:53,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:00:53,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:53,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:53,001 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:53,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 15:00:53,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:00:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:00:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:53,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:53,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598637318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:53,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:53,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 15:00:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967006780] [2022-12-13 15:00:53,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:00:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:00:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:00:53,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:53,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 562 transitions, 13789 flow. Second operand has 16 states, 16 states have (on average 187.125) internal successors, (2994), 16 states have internal predecessors, (2994), 0 states have call successors, (0), 0 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 15:00:53,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:53,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:53,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:54,925 INFO L130 PetriNetUnfolder]: 1517/3071 cut-off events. [2022-12-13 15:00:54,925 INFO L131 PetriNetUnfolder]: For 124750/124754 co-relation queries the response was YES. [2022-12-13 15:00:54,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33431 conditions, 3071 events. 1517/3071 cut-off events. For 124750/124754 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 22599 event pairs, 109 based on Foata normal form. 7/3074 useless extension candidates. Maximal degree in co-relation 33299. Up to 2704 conditions per place. [2022-12-13 15:00:54,960 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 506 selfloop transitions, 76 changer transitions 19/611 dead transitions. [2022-12-13 15:00:54,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 611 transitions, 15440 flow [2022-12-13 15:00:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:00:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:00:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2288 transitions. [2022-12-13 15:00:54,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41721371261852663 [2022-12-13 15:00:54,963 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2288 transitions. [2022-12-13 15:00:54,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2288 transitions. [2022-12-13 15:00:54,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:54,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2288 transitions. [2022-12-13 15:00:54,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 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 15:00:54,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:54,970 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:00:54,970 INFO L175 Difference]: Start difference. First operand has 354 places, 562 transitions, 13789 flow. Second operand 12 states and 2288 transitions. [2022-12-13 15:00:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 611 transitions, 15440 flow [2022-12-13 15:00:55,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 611 transitions, 15078 flow, removed 174 selfloop flow, removed 5 redundant places. [2022-12-13 15:00:55,883 INFO L231 Difference]: Finished difference. Result has 362 places, 563 transitions, 13708 flow [2022-12-13 15:00:55,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=13449, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13708, PETRI_PLACES=362, PETRI_TRANSITIONS=563} [2022-12-13 15:00:55,883 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 342 predicate places. [2022-12-13 15:00:55,883 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 563 transitions, 13708 flow [2022-12-13 15:00:55,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 187.125) internal successors, (2994), 16 states have internal predecessors, (2994), 0 states have call successors, (0), 0 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 15:00:55,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:55,884 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:55,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 15:00:56,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 15:00:56,085 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash -7885660, now seen corresponding path program 35 times [2022-12-13 15:00:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:56,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294956326] [2022-12-13 15:00:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:56,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294956326] [2022-12-13 15:00:56,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294956326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:56,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665744752] [2022-12-13 15:00:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:00:56,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:56,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:56,454 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 15:00:56,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:00:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:00:56,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:00:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:00:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:56,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:00:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:56,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665744752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:00:56,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:00:56,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 15:00:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866422870] [2022-12-13 15:00:56,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:00:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:00:56,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:00:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:00:57,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:00:57,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 563 transitions, 13708 flow. Second operand has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:57,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:57,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:00:57,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:58,495 INFO L130 PetriNetUnfolder]: 1485/2981 cut-off events. [2022-12-13 15:00:58,495 INFO L131 PetriNetUnfolder]: For 115601/115605 co-relation queries the response was YES. [2022-12-13 15:00:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32196 conditions, 2981 events. 1485/2981 cut-off events. For 115601/115605 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 21648 event pairs, 86 based on Foata normal form. 3/2980 useless extension candidates. Maximal degree in co-relation 32064. Up to 2498 conditions per place. [2022-12-13 15:00:58,527 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 493 selfloop transitions, 101 changer transitions 5/609 dead transitions. [2022-12-13 15:00:58,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 609 transitions, 15333 flow [2022-12-13 15:00:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:00:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:00:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1729 transitions. [2022-12-13 15:00:58,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4203744225626064 [2022-12-13 15:00:58,529 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1729 transitions. [2022-12-13 15:00:58,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1729 transitions. [2022-12-13 15:00:58,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:58,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1729 transitions. [2022-12-13 15:00:58,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.11111111111111) internal successors, (1729), 9 states have internal predecessors, (1729), 0 states have call successors, (0), 0 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 15:00:58,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:00:58,532 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:00:58,532 INFO L175 Difference]: Start difference. First operand has 362 places, 563 transitions, 13708 flow. Second operand 9 states and 1729 transitions. [2022-12-13 15:00:58,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 609 transitions, 15333 flow [2022-12-13 15:00:59,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 609 transitions, 14993 flow, removed 142 selfloop flow, removed 4 redundant places. [2022-12-13 15:00:59,436 INFO L231 Difference]: Finished difference. Result has 365 places, 564 transitions, 13676 flow [2022-12-13 15:00:59,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13676, PETRI_PLACES=365, PETRI_TRANSITIONS=564} [2022-12-13 15:00:59,436 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2022-12-13 15:00:59,436 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 564 transitions, 13676 flow [2022-12-13 15:00:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:59,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:59,437 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:59,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 15:00:59,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:59,638 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:00:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:59,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1124159198, now seen corresponding path program 36 times [2022-12-13 15:00:59,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564269593] [2022-12-13 15:00:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:59,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564269593] [2022-12-13 15:00:59,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564269593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:00:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336850718] [2022-12-13 15:00:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:00:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:00:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:00:59,985 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:00:59,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 15:01:00,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:01:00,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:00,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336850718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:00,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:00,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 15:01:00,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649242967] [2022-12-13 15:01:00,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:01:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:01:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:01:00,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:00,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 564 transitions, 13676 flow. Second operand has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 0 states have call successors, (0), 0 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 15:01:00,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:00,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:00,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:01,901 INFO L130 PetriNetUnfolder]: 1476/2954 cut-off events. [2022-12-13 15:01:01,901 INFO L131 PetriNetUnfolder]: For 118802/118806 co-relation queries the response was YES. [2022-12-13 15:01:01,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31753 conditions, 2954 events. 1476/2954 cut-off events. For 118802/118806 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 21303 event pairs, 85 based on Foata normal form. 3/2953 useless extension candidates. Maximal degree in co-relation 31620. Up to 2570 conditions per place. [2022-12-13 15:01:01,931 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 502 selfloop transitions, 94 changer transitions 5/611 dead transitions. [2022-12-13 15:01:01,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 611 transitions, 15252 flow [2022-12-13 15:01:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:01:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:01:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2101 transitions. [2022-12-13 15:01:01,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179431072210066 [2022-12-13 15:01:01,933 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2101 transitions. [2022-12-13 15:01:01,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2101 transitions. [2022-12-13 15:01:01,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:01,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2101 transitions. [2022-12-13 15:01:01,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 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 15:01:01,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:01,937 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:01,937 INFO L175 Difference]: Start difference. First operand has 365 places, 564 transitions, 13676 flow. Second operand 11 states and 2101 transitions. [2022-12-13 15:01:01,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 611 transitions, 15252 flow [2022-12-13 15:01:02,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 611 transitions, 14939 flow, removed 40 selfloop flow, removed 7 redundant places. [2022-12-13 15:01:02,859 INFO L231 Difference]: Finished difference. Result has 369 places, 571 transitions, 13738 flow [2022-12-13 15:01:02,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13738, PETRI_PLACES=369, PETRI_TRANSITIONS=571} [2022-12-13 15:01:02,860 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2022-12-13 15:01:02,860 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 571 transitions, 13738 flow [2022-12-13 15:01:02,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 0 states have call successors, (0), 0 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 15:01:02,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:02,861 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:02,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 15:01:03,062 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -87444882, now seen corresponding path program 37 times [2022-12-13 15:01:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:03,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372181055] [2022-12-13 15:01:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:03,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:03,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372181055] [2022-12-13 15:01:03,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372181055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:03,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387613639] [2022-12-13 15:01:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:01:03,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:03,362 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:03,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 15:01:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:03,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:03,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387613639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:03,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:03,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2022-12-13 15:01:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811172301] [2022-12-13 15:01:03,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:03,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:01:03,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:01:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:01:03,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:03,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 571 transitions, 13738 flow. Second operand has 19 states, 19 states have (on average 187.10526315789474) internal successors, (3555), 19 states have internal predecessors, (3555), 0 states have call successors, (0), 0 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 15:01:03,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:03,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:05,139 INFO L130 PetriNetUnfolder]: 1557/3150 cut-off events. [2022-12-13 15:01:05,140 INFO L131 PetriNetUnfolder]: For 126001/126005 co-relation queries the response was YES. [2022-12-13 15:01:05,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33698 conditions, 3150 events. 1557/3150 cut-off events. For 126001/126005 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23221 event pairs, 120 based on Foata normal form. 4/3150 useless extension candidates. Maximal degree in co-relation 33565. Up to 2835 conditions per place. [2022-12-13 15:01:05,180 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 540 selfloop transitions, 88 changer transitions 7/645 dead transitions. [2022-12-13 15:01:05,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 645 transitions, 16217 flow [2022-12-13 15:01:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1537 transitions. [2022-12-13 15:01:05,182 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42040481400437635 [2022-12-13 15:01:05,182 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1537 transitions. [2022-12-13 15:01:05,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1537 transitions. [2022-12-13 15:01:05,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:05,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1537 transitions. [2022-12-13 15:01:05,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.125) internal successors, (1537), 8 states have internal predecessors, (1537), 0 states have call successors, (0), 0 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 15:01:05,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:05,185 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:05,185 INFO L175 Difference]: Start difference. First operand has 369 places, 571 transitions, 13738 flow. Second operand 8 states and 1537 transitions. [2022-12-13 15:01:05,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 645 transitions, 16217 flow [2022-12-13 15:01:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 645 transitions, 16001 flow, removed 22 selfloop flow, removed 9 redundant places. [2022-12-13 15:01:06,105 INFO L231 Difference]: Finished difference. Result has 370 places, 604 transitions, 14627 flow [2022-12-13 15:01:06,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=13528, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14627, PETRI_PLACES=370, PETRI_TRANSITIONS=604} [2022-12-13 15:01:06,106 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 350 predicate places. [2022-12-13 15:01:06,106 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 604 transitions, 14627 flow [2022-12-13 15:01:06,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.10526315789474) internal successors, (3555), 19 states have internal predecessors, (3555), 0 states have call successors, (0), 0 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 15:01:06,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:06,106 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:06,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 15:01:06,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:06,307 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash -199680072, now seen corresponding path program 38 times [2022-12-13 15:01:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:06,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874410276] [2022-12-13 15:01:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:06,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874410276] [2022-12-13 15:01:06,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874410276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:06,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131456895] [2022-12-13 15:01:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:06,656 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:06,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 15:01:06,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:06,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:06,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131456895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:07,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:07,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 18 [2022-12-13 15:01:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575909433] [2022-12-13 15:01:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:01:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:01:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:01:07,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 457 [2022-12-13 15:01:07,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 604 transitions, 14627 flow. Second operand has 20 states, 20 states have (on average 183.9) internal successors, (3678), 20 states have internal predecessors, (3678), 0 states have call successors, (0), 0 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 15:01:07,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:07,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 457 [2022-12-13 15:01:07,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:08,942 INFO L130 PetriNetUnfolder]: 1552/3119 cut-off events. [2022-12-13 15:01:08,942 INFO L131 PetriNetUnfolder]: For 127492/127496 co-relation queries the response was YES. [2022-12-13 15:01:08,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33728 conditions, 3119 events. 1552/3119 cut-off events. For 127492/127496 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 22800 event pairs, 122 based on Foata normal form. 4/3119 useless extension candidates. Maximal degree in co-relation 33593. Up to 2835 conditions per place. [2022-12-13 15:01:08,975 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 534 selfloop transitions, 88 changer transitions 6/638 dead transitions. [2022-12-13 15:01:08,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 638 transitions, 16212 flow [2022-12-13 15:01:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1509 transitions. [2022-12-13 15:01:08,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41274617067833697 [2022-12-13 15:01:08,977 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1509 transitions. [2022-12-13 15:01:08,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1509 transitions. [2022-12-13 15:01:08,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:08,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1509 transitions. [2022-12-13 15:01:08,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 188.625) internal successors, (1509), 8 states have internal predecessors, (1509), 0 states have call successors, (0), 0 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 15:01:08,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:08,981 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:08,981 INFO L175 Difference]: Start difference. First operand has 370 places, 604 transitions, 14627 flow. Second operand 8 states and 1509 transitions. [2022-12-13 15:01:08,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 638 transitions, 16212 flow [2022-12-13 15:01:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 638 transitions, 15988 flow, removed 62 selfloop flow, removed 4 redundant places. [2022-12-13 15:01:09,990 INFO L231 Difference]: Finished difference. Result has 374 places, 606 transitions, 14722 flow [2022-12-13 15:01:09,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=14407, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14722, PETRI_PLACES=374, PETRI_TRANSITIONS=606} [2022-12-13 15:01:09,990 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 354 predicate places. [2022-12-13 15:01:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 606 transitions, 14722 flow [2022-12-13 15:01:09,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.9) internal successors, (3678), 20 states have internal predecessors, (3678), 0 states have call successors, (0), 0 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 15:01:09,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:09,991 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:09,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:10,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 15:01:10,192 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1640413160, now seen corresponding path program 39 times [2022-12-13 15:01:10,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675711802] [2022-12-13 15:01:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675711802] [2022-12-13 15:01:10,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675711802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468646401] [2022-12-13 15:01:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:01:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:10,504 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:10,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 15:01:10,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:01:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:10,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468646401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:10,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:10,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-13 15:01:10,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403084908] [2022-12-13 15:01:10,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:10,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:01:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:01:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:01:11,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:11,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 606 transitions, 14722 flow. Second operand has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 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 15:01:11,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:11,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:11,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:12,320 INFO L130 PetriNetUnfolder]: 1540/3083 cut-off events. [2022-12-13 15:01:12,320 INFO L131 PetriNetUnfolder]: For 127875/127879 co-relation queries the response was YES. [2022-12-13 15:01:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33511 conditions, 3083 events. 1540/3083 cut-off events. For 127875/127879 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 22388 event pairs, 126 based on Foata normal form. 4/3083 useless extension candidates. Maximal degree in co-relation 33375. Up to 2887 conditions per place. [2022-12-13 15:01:12,350 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 551 selfloop transitions, 68 changer transitions 6/635 dead transitions. [2022-12-13 15:01:12,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 635 transitions, 16218 flow [2022-12-13 15:01:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1528 transitions. [2022-12-13 15:01:12,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179431072210066 [2022-12-13 15:01:12,352 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1528 transitions. [2022-12-13 15:01:12,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1528 transitions. [2022-12-13 15:01:12,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:12,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1528 transitions. [2022-12-13 15:01:12,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.0) internal successors, (1528), 8 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:12,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:12,354 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:12,355 INFO L175 Difference]: Start difference. First operand has 374 places, 606 transitions, 14722 flow. Second operand 8 states and 1528 transitions. [2022-12-13 15:01:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 635 transitions, 16218 flow [2022-12-13 15:01:13,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 635 transitions, 15948 flow, removed 70 selfloop flow, removed 5 redundant places. [2022-12-13 15:01:13,249 INFO L231 Difference]: Finished difference. Result has 378 places, 610 transitions, 14775 flow [2022-12-13 15:01:13,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=14482, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14775, PETRI_PLACES=378, PETRI_TRANSITIONS=610} [2022-12-13 15:01:13,249 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 358 predicate places. [2022-12-13 15:01:13,249 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 610 transitions, 14775 flow [2022-12-13 15:01:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 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 15:01:13,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:13,250 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:13,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:13,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 15:01:13,451 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 438785346, now seen corresponding path program 40 times [2022-12-13 15:01:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:13,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951957093] [2022-12-13 15:01:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951957093] [2022-12-13 15:01:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951957093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:13,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912402345] [2022-12-13 15:01:13,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:01:13,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:13,723 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:13,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 15:01:13,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:01:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:14,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912402345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:14,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:14,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 15:01:14,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413289573] [2022-12-13 15:01:14,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:14,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:01:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:01:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:01:14,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:14,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 610 transitions, 14775 flow. Second operand has 16 states, 16 states have (on average 187.25) internal successors, (2996), 16 states have internal predecessors, (2996), 0 states have call successors, (0), 0 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 15:01:14,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:14,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:15,664 INFO L130 PetriNetUnfolder]: 1644/3320 cut-off events. [2022-12-13 15:01:15,664 INFO L131 PetriNetUnfolder]: For 135153/135157 co-relation queries the response was YES. [2022-12-13 15:01:15,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35739 conditions, 3320 events. 1644/3320 cut-off events. For 135153/135157 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 24743 event pairs, 135 based on Foata normal form. 9/3325 useless extension candidates. Maximal degree in co-relation 35601. Up to 2934 conditions per place. [2022-12-13 15:01:15,706 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 589 selfloop transitions, 99 changer transitions 24/722 dead transitions. [2022-12-13 15:01:15,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 722 transitions, 17946 flow [2022-12-13 15:01:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:01:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:01:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2295 transitions. [2022-12-13 15:01:15,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41849015317286653 [2022-12-13 15:01:15,708 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2295 transitions. [2022-12-13 15:01:15,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2295 transitions. [2022-12-13 15:01:15,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:15,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2295 transitions. [2022-12-13 15:01:15,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.25) internal successors, (2295), 12 states have internal predecessors, (2295), 0 states have call successors, (0), 0 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 15:01:15,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:01:15,713 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 457.0) internal successors, (5941), 13 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 15:01:15,713 INFO L175 Difference]: Start difference. First operand has 378 places, 610 transitions, 14775 flow. Second operand 12 states and 2295 transitions. [2022-12-13 15:01:15,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 722 transitions, 17946 flow [2022-12-13 15:01:16,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 722 transitions, 17727 flow, removed 51 selfloop flow, removed 5 redundant places. [2022-12-13 15:01:16,806 INFO L231 Difference]: Finished difference. Result has 393 places, 662 transitions, 16163 flow [2022-12-13 15:01:16,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=14564, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16163, PETRI_PLACES=393, PETRI_TRANSITIONS=662} [2022-12-13 15:01:16,807 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2022-12-13 15:01:16,807 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 662 transitions, 16163 flow [2022-12-13 15:01:16,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 187.25) internal successors, (2996), 16 states have internal predecessors, (2996), 0 states have call successors, (0), 0 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 15:01:16,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:16,807 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:16,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-13 15:01:17,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:17,008 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1585206404, now seen corresponding path program 41 times [2022-12-13 15:01:17,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:17,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653252082] [2022-12-13 15:01:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653252082] [2022-12-13 15:01:17,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653252082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063915220] [2022-12-13 15:01:17,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:01:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:17,301 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:17,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 15:01:17,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:17,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:17,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063915220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:17,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:17,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 15:01:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833137640] [2022-12-13 15:01:17,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:01:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:01:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:01:17,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:17,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 662 transitions, 16163 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 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 15:01:17,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:17,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:19,414 INFO L130 PetriNetUnfolder]: 1685/3379 cut-off events. [2022-12-13 15:01:19,414 INFO L131 PetriNetUnfolder]: For 147625/147629 co-relation queries the response was YES. [2022-12-13 15:01:19,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37356 conditions, 3379 events. 1685/3379 cut-off events. For 147625/147629 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 25076 event pairs, 133 based on Foata normal form. 5/3380 useless extension candidates. Maximal degree in co-relation 37209. Up to 2963 conditions per place. [2022-12-13 15:01:19,451 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 606 selfloop transitions, 120 changer transitions 5/741 dead transitions. [2022-12-13 15:01:19,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 741 transitions, 18851 flow [2022-12-13 15:01:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:01:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:01:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2109 transitions. [2022-12-13 15:01:19,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41953451362641736 [2022-12-13 15:01:19,453 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2109 transitions. [2022-12-13 15:01:19,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2109 transitions. [2022-12-13 15:01:19,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:19,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2109 transitions. [2022-12-13 15:01:19,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.72727272727272) internal successors, (2109), 11 states have internal predecessors, (2109), 0 states have call successors, (0), 0 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 15:01:19,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:19,456 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:19,456 INFO L175 Difference]: Start difference. First operand has 393 places, 662 transitions, 16163 flow. Second operand 11 states and 2109 transitions. [2022-12-13 15:01:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 741 transitions, 18851 flow [2022-12-13 15:01:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 741 transitions, 18389 flow, removed 231 selfloop flow, removed 2 redundant places. [2022-12-13 15:01:20,710 INFO L231 Difference]: Finished difference. Result has 403 places, 696 transitions, 16962 flow [2022-12-13 15:01:20,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=15725, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16962, PETRI_PLACES=403, PETRI_TRANSITIONS=696} [2022-12-13 15:01:20,710 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2022-12-13 15:01:20,710 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 696 transitions, 16962 flow [2022-12-13 15:01:20,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 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 15:01:20,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:20,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:20,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:20,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:20,912 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 177926042, now seen corresponding path program 42 times [2022-12-13 15:01:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:20,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899784153] [2022-12-13 15:01:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:21,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899784153] [2022-12-13 15:01:21,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899784153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344344602] [2022-12-13 15:01:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:01:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:21,187 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:21,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 15:01:21,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:01:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:21,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:21,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344344602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:21,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:21,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 15:01:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317255045] [2022-12-13 15:01:21,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:21,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:01:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:01:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:01:21,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:21,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 696 transitions, 16962 flow. Second operand has 18 states, 18 states have (on average 187.16666666666666) internal successors, (3369), 18 states have internal predecessors, (3369), 0 states have call successors, (0), 0 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 15:01:21,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:21,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:21,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:23,174 INFO L130 PetriNetUnfolder]: 1725/3451 cut-off events. [2022-12-13 15:01:23,174 INFO L131 PetriNetUnfolder]: For 156658/156662 co-relation queries the response was YES. [2022-12-13 15:01:23,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 3451 events. 1725/3451 cut-off events. For 156658/156662 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 25658 event pairs, 128 based on Foata normal form. 3/3450 useless extension candidates. Maximal degree in co-relation 38027. Up to 2962 conditions per place. [2022-12-13 15:01:23,218 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 616 selfloop transitions, 125 changer transitions 5/756 dead transitions. [2022-12-13 15:01:23,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 756 transitions, 19374 flow [2022-12-13 15:01:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:01:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:01:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1922 transitions. [2022-12-13 15:01:23,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4205689277899344 [2022-12-13 15:01:23,220 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1922 transitions. [2022-12-13 15:01:23,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1922 transitions. [2022-12-13 15:01:23,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:23,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1922 transitions. [2022-12-13 15:01:23,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.2) internal successors, (1922), 10 states have internal predecessors, (1922), 0 states have call successors, (0), 0 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 15:01:23,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 457.0) internal successors, (5027), 11 states have internal predecessors, (5027), 0 states have call successors, (0), 0 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 15:01:23,224 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 457.0) internal successors, (5027), 11 states have internal predecessors, (5027), 0 states have call successors, (0), 0 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 15:01:23,224 INFO L175 Difference]: Start difference. First operand has 403 places, 696 transitions, 16962 flow. Second operand 10 states and 1922 transitions. [2022-12-13 15:01:23,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 756 transitions, 19374 flow [2022-12-13 15:01:24,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 756 transitions, 18950 flow, removed 144 selfloop flow, removed 7 redundant places. [2022-12-13 15:01:24,538 INFO L231 Difference]: Finished difference. Result has 407 places, 712 transitions, 17433 flow [2022-12-13 15:01:24,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=16548, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17433, PETRI_PLACES=407, PETRI_TRANSITIONS=712} [2022-12-13 15:01:24,538 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 387 predicate places. [2022-12-13 15:01:24,538 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 712 transitions, 17433 flow [2022-12-13 15:01:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.16666666666666) internal successors, (3369), 18 states have internal predecessors, (3369), 0 states have call successors, (0), 0 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 15:01:24,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:24,539 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:24,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 15:01:24,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:24,740 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -604597484, now seen corresponding path program 43 times [2022-12-13 15:01:24,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:24,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195134424] [2022-12-13 15:01:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:24,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195134424] [2022-12-13 15:01:25,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195134424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438397887] [2022-12-13 15:01:25,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:01:25,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:25,061 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:25,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 15:01:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:25,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:25,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:25,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438397887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:25,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:25,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 15:01:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054171474] [2022-12-13 15:01:25,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:01:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:01:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:01:25,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:25,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 712 transitions, 17433 flow. Second operand has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:25,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:25,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:25,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:27,246 INFO L130 PetriNetUnfolder]: 1722/3427 cut-off events. [2022-12-13 15:01:27,246 INFO L131 PetriNetUnfolder]: For 159281/159285 co-relation queries the response was YES. [2022-12-13 15:01:27,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38121 conditions, 3427 events. 1722/3427 cut-off events. For 159281/159285 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 25311 event pairs, 131 based on Foata normal form. 6/3429 useless extension candidates. Maximal degree in co-relation 37970. Up to 2962 conditions per place. [2022-12-13 15:01:27,283 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 606 selfloop transitions, 120 changer transitions 15/751 dead transitions. [2022-12-13 15:01:27,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 751 transitions, 19214 flow [2022-12-13 15:01:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:01:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 15:01:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2105 transitions. [2022-12-13 15:01:27,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41873881042371197 [2022-12-13 15:01:27,285 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2105 transitions. [2022-12-13 15:01:27,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2105 transitions. [2022-12-13 15:01:27,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:27,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2105 transitions. [2022-12-13 15:01:27,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 191.36363636363637) internal successors, (2105), 11 states have internal predecessors, (2105), 0 states have call successors, (0), 0 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 15:01:27,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:27,288 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 457.0) internal successors, (5484), 12 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 15:01:27,288 INFO L175 Difference]: Start difference. First operand has 407 places, 712 transitions, 17433 flow. Second operand 11 states and 2105 transitions. [2022-12-13 15:01:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 751 transitions, 19214 flow [2022-12-13 15:01:28,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 751 transitions, 18827 flow, removed 112 selfloop flow, removed 5 redundant places. [2022-12-13 15:01:28,638 INFO L231 Difference]: Finished difference. Result has 415 places, 707 transitions, 17290 flow [2022-12-13 15:01:28,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=17052, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17290, PETRI_PLACES=415, PETRI_TRANSITIONS=707} [2022-12-13 15:01:28,639 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 395 predicate places. [2022-12-13 15:01:28,639 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 707 transitions, 17290 flow [2022-12-13 15:01:28,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:28,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:28,639 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:28,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:28,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 15:01:28,841 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 863260264, now seen corresponding path program 44 times [2022-12-13 15:01:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:28,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101600242] [2022-12-13 15:01:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:29,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101600242] [2022-12-13 15:01:29,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101600242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925861481] [2022-12-13 15:01:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:29,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:29,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:29,108 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 15:01:29,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:29,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:29,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925861481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:29,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:29,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-13 15:01:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635963334] [2022-12-13 15:01:29,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:01:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:01:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:01:29,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:29,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 707 transitions, 17290 flow. Second operand has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 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 15:01:29,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:29,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:31,328 INFO L130 PetriNetUnfolder]: 1837/3681 cut-off events. [2022-12-13 15:01:31,328 INFO L131 PetriNetUnfolder]: For 166333/166337 co-relation queries the response was YES. [2022-12-13 15:01:31,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40652 conditions, 3681 events. 1837/3681 cut-off events. For 166333/166337 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27783 event pairs, 128 based on Foata normal form. 5/3682 useless extension candidates. Maximal degree in co-relation 40498. Up to 3255 conditions per place. [2022-12-13 15:01:31,366 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 674 selfloop transitions, 103 changer transitions 7/794 dead transitions. [2022-12-13 15:01:31,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 794 transitions, 20376 flow [2022-12-13 15:01:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1539 transitions. [2022-12-13 15:01:31,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4209518599562363 [2022-12-13 15:01:31,368 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1539 transitions. [2022-12-13 15:01:31,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1539 transitions. [2022-12-13 15:01:31,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:31,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1539 transitions. [2022-12-13 15:01:31,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.375) internal successors, (1539), 8 states have internal predecessors, (1539), 0 states have call successors, (0), 0 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 15:01:31,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:31,371 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 457.0) internal successors, (4113), 9 states have internal predecessors, (4113), 0 states have call successors, (0), 0 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 15:01:31,371 INFO L175 Difference]: Start difference. First operand has 415 places, 707 transitions, 17290 flow. Second operand 8 states and 1539 transitions. [2022-12-13 15:01:31,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 794 transitions, 20376 flow [2022-12-13 15:01:32,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 794 transitions, 19984 flow, removed 84 selfloop flow, removed 8 redundant places. [2022-12-13 15:01:32,764 INFO L231 Difference]: Finished difference. Result has 415 places, 750 transitions, 18350 flow [2022-12-13 15:01:32,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=16910, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18350, PETRI_PLACES=415, PETRI_TRANSITIONS=750} [2022-12-13 15:01:32,764 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 395 predicate places. [2022-12-13 15:01:32,764 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 750 transitions, 18350 flow [2022-12-13 15:01:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 0 states have call successors, (0), 0 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 15:01:32,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:32,765 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:32,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:32,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:32,966 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1993146758, now seen corresponding path program 45 times [2022-12-13 15:01:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:32,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250946162] [2022-12-13 15:01:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250946162] [2022-12-13 15:01:33,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250946162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581776151] [2022-12-13 15:01:33,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:01:33,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:33,239 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:33,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 15:01:33,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:01:33,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:33,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:33,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581776151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:33,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:33,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-13 15:01:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775042070] [2022-12-13 15:01:33,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:33,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:01:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:01:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:01:33,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:33,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 750 transitions, 18350 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 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 15:01:33,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:33,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:33,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:35,586 INFO L130 PetriNetUnfolder]: 1832/3646 cut-off events. [2022-12-13 15:01:35,586 INFO L131 PetriNetUnfolder]: For 169234/169238 co-relation queries the response was YES. [2022-12-13 15:01:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40734 conditions, 3646 events. 1832/3646 cut-off events. For 169234/169238 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27209 event pairs, 131 based on Foata normal form. 5/3647 useless extension candidates. Maximal degree in co-relation 40578. Up to 3255 conditions per place. [2022-12-13 15:01:35,625 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 676 selfloop transitions, 99 changer transitions 7/792 dead transitions. [2022-12-13 15:01:35,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 792 transitions, 20322 flow [2022-12-13 15:01:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:01:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:01:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1726 transitions. [2022-12-13 15:01:35,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4196450279601264 [2022-12-13 15:01:35,627 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1726 transitions. [2022-12-13 15:01:35,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1726 transitions. [2022-12-13 15:01:35,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:35,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1726 transitions. [2022-12-13 15:01:35,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.77777777777777) internal successors, (1726), 9 states have internal predecessors, (1726), 0 states have call successors, (0), 0 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 15:01:35,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:35,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:35,630 INFO L175 Difference]: Start difference. First operand has 415 places, 750 transitions, 18350 flow. Second operand 9 states and 1726 transitions. [2022-12-13 15:01:35,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 792 transitions, 20322 flow [2022-12-13 15:01:37,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 792 transitions, 20003 flow, removed 103 selfloop flow, removed 4 redundant places. [2022-12-13 15:01:37,060 INFO L231 Difference]: Finished difference. Result has 420 places, 751 transitions, 18319 flow [2022-12-13 15:01:37,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=18037, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18319, PETRI_PLACES=420, PETRI_TRANSITIONS=751} [2022-12-13 15:01:37,061 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2022-12-13 15:01:37,061 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 751 transitions, 18319 flow [2022-12-13 15:01:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 0 states have call successors, (0), 0 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 15:01:37,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:37,061 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:37,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-13 15:01:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:37,263 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -499487344, now seen corresponding path program 46 times [2022-12-13 15:01:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:37,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752500390] [2022-12-13 15:01:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752500390] [2022-12-13 15:01:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752500390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515701282] [2022-12-13 15:01:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:01:37,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:37,591 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:37,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 15:01:37,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:01:37,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 15:01:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515701282] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:37,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:37,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2022-12-13 15:01:37,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109786212] [2022-12-13 15:01:37,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:37,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:01:37,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:01:37,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:01:38,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 457 [2022-12-13 15:01:38,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 751 transitions, 18319 flow. Second operand has 16 states, 16 states have (on average 187.1875) internal successors, (2995), 16 states have internal predecessors, (2995), 0 states have call successors, (0), 0 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 15:01:38,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:38,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 457 [2022-12-13 15:01:38,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:39,993 INFO L130 PetriNetUnfolder]: 1816/3596 cut-off events. [2022-12-13 15:01:39,993 INFO L131 PetriNetUnfolder]: For 163199/163203 co-relation queries the response was YES. [2022-12-13 15:01:40,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39974 conditions, 3596 events. 1816/3596 cut-off events. For 163199/163203 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26671 event pairs, 127 based on Foata normal form. 5/3597 useless extension candidates. Maximal degree in co-relation 39817. Up to 3316 conditions per place. [2022-12-13 15:01:40,033 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 692 selfloop transitions, 77 changer transitions 6/785 dead transitions. [2022-12-13 15:01:40,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 785 transitions, 20171 flow [2022-12-13 15:01:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:01:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:01:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1719 transitions. [2022-12-13 15:01:40,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4179431072210066 [2022-12-13 15:01:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1719 transitions. [2022-12-13 15:01:40,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1719 transitions. [2022-12-13 15:01:40,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:40,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1719 transitions. [2022-12-13 15:01:40,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 191.0) internal successors, (1719), 9 states have internal predecessors, (1719), 0 states have call successors, (0), 0 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 15:01:40,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:40,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:40,038 INFO L175 Difference]: Start difference. First operand has 420 places, 751 transitions, 18319 flow. Second operand 9 states and 1719 transitions. [2022-12-13 15:01:40,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 785 transitions, 20171 flow [2022-12-13 15:01:41,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 785 transitions, 20012 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-12-13 15:01:41,492 INFO L231 Difference]: Finished difference. Result has 424 places, 755 transitions, 18510 flow [2022-12-13 15:01:41,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=18164, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18510, PETRI_PLACES=424, PETRI_TRANSITIONS=755} [2022-12-13 15:01:41,493 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2022-12-13 15:01:41,493 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 755 transitions, 18510 flow [2022-12-13 15:01:41,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 187.1875) internal successors, (2995), 16 states have internal predecessors, (2995), 0 states have call successors, (0), 0 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 15:01:41,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:41,494 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:41,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 15:01:41,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 15:01:41,695 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -616621550, now seen corresponding path program 47 times [2022-12-13 15:01:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240220317] [2022-12-13 15:01:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240220317] [2022-12-13 15:01:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240220317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801853358] [2022-12-13 15:01:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:01:41,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:41,793 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:41,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 15:01:41,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:01:41,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:01:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:41,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801853358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:41,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:41,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 15:01:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300304609] [2022-12-13 15:01:41,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:41,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:01:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:01:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:01:41,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:01:41,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 755 transitions, 18510 flow. Second operand has 14 states, 14 states have (on average 195.0) internal successors, (2730), 14 states have internal predecessors, (2730), 0 states have call successors, (0), 0 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 15:01:41,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:41,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:01:41,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:43,967 INFO L130 PetriNetUnfolder]: 2261/4536 cut-off events. [2022-12-13 15:01:43,967 INFO L131 PetriNetUnfolder]: For 209061/209061 co-relation queries the response was YES. [2022-12-13 15:01:44,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50019 conditions, 4536 events. 2261/4536 cut-off events. For 209061/209061 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34989 event pairs, 349 based on Foata normal form. 4/4540 useless extension candidates. Maximal degree in co-relation 49861. Up to 1649 conditions per place. [2022-12-13 15:01:44,017 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 588 selfloop transitions, 399 changer transitions 15/1002 dead transitions. [2022-12-13 15:01:44,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1002 transitions, 26250 flow [2022-12-13 15:01:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:01:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:01:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2777 transitions. [2022-12-13 15:01:44,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43404188809002814 [2022-12-13 15:01:44,019 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2777 transitions. [2022-12-13 15:01:44,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2777 transitions. [2022-12-13 15:01:44,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:44,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2777 transitions. [2022-12-13 15:01:44,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 198.35714285714286) internal successors, (2777), 14 states have internal predecessors, (2777), 0 states have call successors, (0), 0 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 15:01:44,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:01:44,024 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:01:44,024 INFO L175 Difference]: Start difference. First operand has 424 places, 755 transitions, 18510 flow. Second operand 14 states and 2777 transitions. [2022-12-13 15:01:44,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1002 transitions, 26250 flow [2022-12-13 15:01:46,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1002 transitions, 25810 flow, removed 113 selfloop flow, removed 7 redundant places. [2022-12-13 15:01:46,034 INFO L231 Difference]: Finished difference. Result has 435 places, 898 transitions, 23304 flow [2022-12-13 15:01:46,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=18189, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23304, PETRI_PLACES=435, PETRI_TRANSITIONS=898} [2022-12-13 15:01:46,034 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 415 predicate places. [2022-12-13 15:01:46,034 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 898 transitions, 23304 flow [2022-12-13 15:01:46,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 195.0) internal successors, (2730), 14 states have internal predecessors, (2730), 0 states have call successors, (0), 0 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 15:01:46,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:46,035 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:46,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-13 15:01:46,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 15:01:46,236 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1840058629, now seen corresponding path program 48 times [2022-12-13 15:01:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:46,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834527625] [2022-12-13 15:01:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:46,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834527625] [2022-12-13 15:01:46,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834527625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:46,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489988496] [2022-12-13 15:01:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:01:46,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:46,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:46,330 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:46,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 15:01:46,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:01:46,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:01:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:46,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489988496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:46,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:46,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 15:01:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011964627] [2022-12-13 15:01:46,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:01:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:01:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:01:46,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:01:46,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 898 transitions, 23304 flow. Second operand has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 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 15:01:46,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:46,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:01:46,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:48,825 INFO L130 PetriNetUnfolder]: 2411/4800 cut-off events. [2022-12-13 15:01:48,825 INFO L131 PetriNetUnfolder]: For 244075/244075 co-relation queries the response was YES. [2022-12-13 15:01:48,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54907 conditions, 4800 events. 2411/4800 cut-off events. For 244075/244075 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 37522 event pairs, 208 based on Foata normal form. 36/4836 useless extension candidates. Maximal degree in co-relation 54744. Up to 2817 conditions per place. [2022-12-13 15:01:48,879 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 747 selfloop transitions, 292 changer transitions 0/1039 dead transitions. [2022-12-13 15:01:48,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1039 transitions, 28343 flow [2022-12-13 15:01:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:01:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:01:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1803 transitions. [2022-12-13 15:01:48,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43836615609044494 [2022-12-13 15:01:48,881 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1803 transitions. [2022-12-13 15:01:48,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1803 transitions. [2022-12-13 15:01:48,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:48,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1803 transitions. [2022-12-13 15:01:48,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 0 states have call successors, (0), 0 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 15:01:48,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:48,884 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:01:48,884 INFO L175 Difference]: Start difference. First operand has 435 places, 898 transitions, 23304 flow. Second operand 9 states and 1803 transitions. [2022-12-13 15:01:48,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1039 transitions, 28343 flow [2022-12-13 15:01:51,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1039 transitions, 27373 flow, removed 292 selfloop flow, removed 9 redundant places. [2022-12-13 15:01:51,455 INFO L231 Difference]: Finished difference. Result has 435 places, 941 transitions, 24297 flow [2022-12-13 15:01:51,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=22336, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24297, PETRI_PLACES=435, PETRI_TRANSITIONS=941} [2022-12-13 15:01:51,456 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 415 predicate places. [2022-12-13 15:01:51,456 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 941 transitions, 24297 flow [2022-12-13 15:01:51,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 195.07142857142858) internal successors, (2731), 14 states have internal predecessors, (2731), 0 states have call successors, (0), 0 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 15:01:51,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:51,456 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:51,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-13 15:01:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 15:01:51,657 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -299395347, now seen corresponding path program 49 times [2022-12-13 15:01:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516242431] [2022-12-13 15:01:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516242431] [2022-12-13 15:01:51,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516242431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555954773] [2022-12-13 15:01:51,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:01:51,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:51,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:51,768 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 15:01:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:01:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:51,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:51,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555954773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:51,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:51,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:01:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30321743] [2022-12-13 15:01:51,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:51,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:01:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:01:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:01:51,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:01:51,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 941 transitions, 24297 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:01:51,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:51,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:01:51,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:55,080 INFO L130 PetriNetUnfolder]: 2689/5376 cut-off events. [2022-12-13 15:01:55,080 INFO L131 PetriNetUnfolder]: For 286162/286162 co-relation queries the response was YES. [2022-12-13 15:01:55,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62449 conditions, 5376 events. 2689/5376 cut-off events. For 286162/286162 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 43051 event pairs, 174 based on Foata normal form. 62/5438 useless extension candidates. Maximal degree in co-relation 62286. Up to 3472 conditions per place. [2022-12-13 15:01:55,181 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 767 selfloop transitions, 356 changer transitions 0/1123 dead transitions. [2022-12-13 15:01:55,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1123 transitions, 30717 flow [2022-12-13 15:01:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:01:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:01:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4391 transitions. [2022-12-13 15:01:55,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367415953849214 [2022-12-13 15:01:55,185 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4391 transitions. [2022-12-13 15:01:55,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4391 transitions. [2022-12-13 15:01:55,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:55,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4391 transitions. [2022-12-13 15:01:55,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.5909090909091) internal successors, (4391), 22 states have internal predecessors, (4391), 0 states have call successors, (0), 0 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 15:01:55,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:01:55,191 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:01:55,192 INFO L175 Difference]: Start difference. First operand has 435 places, 941 transitions, 24297 flow. Second operand 22 states and 4391 transitions. [2022-12-13 15:01:55,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1123 transitions, 30717 flow [2022-12-13 15:01:57,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1123 transitions, 30180 flow, removed 88 selfloop flow, removed 4 redundant places. [2022-12-13 15:01:57,683 INFO L231 Difference]: Finished difference. Result has 461 places, 1022 transitions, 27474 flow [2022-12-13 15:01:57,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=23841, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=27474, PETRI_PLACES=461, PETRI_TRANSITIONS=1022} [2022-12-13 15:01:57,684 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 441 predicate places. [2022-12-13 15:01:57,684 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1022 transitions, 27474 flow [2022-12-13 15:01:57,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:01:57,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:57,685 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:57,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:57,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 15:01:57,886 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1931851600, now seen corresponding path program 50 times [2022-12-13 15:01:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:57,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066433012] [2022-12-13 15:01:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066433012] [2022-12-13 15:01:57,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066433012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887514505] [2022-12-13 15:01:57,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:57,984 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 15:01:58,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:58,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:01:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:58,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:58,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887514505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:58,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:58,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:01:58,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552362136] [2022-12-13 15:01:58,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:58,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:01:58,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:01:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:01:58,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:01:58,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1022 transitions, 27474 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:01:58,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:58,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:01:58,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:01,782 INFO L130 PetriNetUnfolder]: 3172/6387 cut-off events. [2022-12-13 15:02:01,783 INFO L131 PetriNetUnfolder]: For 423200/423200 co-relation queries the response was YES. [2022-12-13 15:02:01,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79616 conditions, 6387 events. 3172/6387 cut-off events. For 423200/423200 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 53015 event pairs, 599 based on Foata normal form. 32/6419 useless extension candidates. Maximal degree in co-relation 79444. Up to 3029 conditions per place. [2022-12-13 15:02:01,880 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 800 selfloop transitions, 507 changer transitions 1/1308 dead transitions. [2022-12-13 15:02:01,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1308 transitions, 37219 flow [2022-12-13 15:02:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:02:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:02:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4383 transitions. [2022-12-13 15:02:01,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.435945892182216 [2022-12-13 15:02:01,886 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4383 transitions. [2022-12-13 15:02:01,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4383 transitions. [2022-12-13 15:02:01,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:01,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4383 transitions. [2022-12-13 15:02:01,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.22727272727272) internal successors, (4383), 22 states have internal predecessors, (4383), 0 states have call successors, (0), 0 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 15:02:01,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:02:01,897 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:02:01,897 INFO L175 Difference]: Start difference. First operand has 461 places, 1022 transitions, 27474 flow. Second operand 22 states and 4383 transitions. [2022-12-13 15:02:01,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1308 transitions, 37219 flow [2022-12-13 15:02:05,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 1308 transitions, 35551 flow, removed 683 selfloop flow, removed 13 redundant places. [2022-12-13 15:02:05,775 INFO L231 Difference]: Finished difference. Result has 476 places, 1163 transitions, 31867 flow [2022-12-13 15:02:05,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=26144, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=31867, PETRI_PLACES=476, PETRI_TRANSITIONS=1163} [2022-12-13 15:02:05,776 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2022-12-13 15:02:05,776 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1163 transitions, 31867 flow [2022-12-13 15:02:05,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:02:05,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:05,776 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:05,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-13 15:02:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:05,977 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -203999430, now seen corresponding path program 51 times [2022-12-13 15:02:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:05,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933526878] [2022-12-13 15:02:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933526878] [2022-12-13 15:02:06,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933526878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431761108] [2022-12-13 15:02:06,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:06,071 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 15:02:06,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:02:06,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:06,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:06,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431761108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:06,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:06,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:02:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643700638] [2022-12-13 15:02:06,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:06,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:06,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:06,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:06,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1163 transitions, 31867 flow. Second operand has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 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 15:02:06,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:06,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:06,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:10,397 INFO L130 PetriNetUnfolder]: 3317/6728 cut-off events. [2022-12-13 15:02:10,397 INFO L131 PetriNetUnfolder]: For 451298/451298 co-relation queries the response was YES. [2022-12-13 15:02:10,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84772 conditions, 6728 events. 3317/6728 cut-off events. For 451298/451298 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 56396 event pairs, 461 based on Foata normal form. 48/6776 useless extension candidates. Maximal degree in co-relation 84594. Up to 2431 conditions per place. [2022-12-13 15:02:10,482 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 799 selfloop transitions, 564 changer transitions 12/1375 dead transitions. [2022-12-13 15:02:10,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1375 transitions, 39728 flow [2022-12-13 15:02:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:02:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 15:02:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5363 transitions. [2022-12-13 15:02:10,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346381392333252 [2022-12-13 15:02:10,486 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5363 transitions. [2022-12-13 15:02:10,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5363 transitions. [2022-12-13 15:02:10,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:10,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5363 transitions. [2022-12-13 15:02:10,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 198.62962962962962) internal successors, (5363), 27 states have internal predecessors, (5363), 0 states have call successors, (0), 0 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 15:02:10,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 457.0) internal successors, (12796), 28 states have internal predecessors, (12796), 0 states have call successors, (0), 0 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 15:02:10,496 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 457.0) internal successors, (12796), 28 states have internal predecessors, (12796), 0 states have call successors, (0), 0 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 15:02:10,496 INFO L175 Difference]: Start difference. First operand has 476 places, 1163 transitions, 31867 flow. Second operand 27 states and 5363 transitions. [2022-12-13 15:02:10,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1375 transitions, 39728 flow [2022-12-13 15:02:14,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1375 transitions, 38254 flow, removed 520 selfloop flow, removed 10 redundant places. [2022-12-13 15:02:14,791 INFO L231 Difference]: Finished difference. Result has 500 places, 1204 transitions, 34160 flow [2022-12-13 15:02:14,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=30605, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=34160, PETRI_PLACES=500, PETRI_TRANSITIONS=1204} [2022-12-13 15:02:14,792 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 480 predicate places. [2022-12-13 15:02:14,792 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1204 transitions, 34160 flow [2022-12-13 15:02:14,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 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 15:02:14,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:14,792 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:14,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 15:02:14,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:14,993 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1428462695, now seen corresponding path program 52 times [2022-12-13 15:02:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049844565] [2022-12-13 15:02:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:15,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049844565] [2022-12-13 15:02:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049844565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547836268] [2022-12-13 15:02:15,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:15,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:15,072 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:15,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 15:02:15,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:15,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:15,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:15,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:15,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547836268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:15,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:15,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:02:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672362803] [2022-12-13 15:02:15,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:15,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:15,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1204 transitions, 34160 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:02:15,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:15,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:19,431 INFO L130 PetriNetUnfolder]: 3242/6513 cut-off events. [2022-12-13 15:02:19,431 INFO L131 PetriNetUnfolder]: For 433389/433389 co-relation queries the response was YES. [2022-12-13 15:02:19,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82613 conditions, 6513 events. 3242/6513 cut-off events. For 433389/433389 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 53912 event pairs, 66 based on Foata normal form. 26/6539 useless extension candidates. Maximal degree in co-relation 82428. Up to 1722 conditions per place. [2022-12-13 15:02:19,514 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 704 selfloop transitions, 581 changer transitions 5/1290 dead transitions. [2022-12-13 15:02:19,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1290 transitions, 38390 flow [2022-12-13 15:02:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:02:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:02:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5541 transitions. [2022-12-13 15:02:19,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4330259456080025 [2022-12-13 15:02:19,518 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5541 transitions. [2022-12-13 15:02:19,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5541 transitions. [2022-12-13 15:02:19,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:19,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5541 transitions. [2022-12-13 15:02:19,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 197.89285714285714) internal successors, (5541), 28 states have internal predecessors, (5541), 0 states have call successors, (0), 0 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 15:02:19,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 457.0) internal successors, (13253), 29 states have internal predecessors, (13253), 0 states have call successors, (0), 0 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 15:02:19,527 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 457.0) internal successors, (13253), 29 states have internal predecessors, (13253), 0 states have call successors, (0), 0 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 15:02:19,527 INFO L175 Difference]: Start difference. First operand has 500 places, 1204 transitions, 34160 flow. Second operand 28 states and 5541 transitions. [2022-12-13 15:02:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1290 transitions, 38390 flow [2022-12-13 15:02:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1290 transitions, 37361 flow, removed 350 selfloop flow, removed 10 redundant places. [2022-12-13 15:02:24,325 INFO L231 Difference]: Finished difference. Result has 518 places, 1211 transitions, 34854 flow [2022-12-13 15:02:24,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=32613, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=34854, PETRI_PLACES=518, PETRI_TRANSITIONS=1211} [2022-12-13 15:02:24,326 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 498 predicate places. [2022-12-13 15:02:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1211 transitions, 34854 flow [2022-12-13 15:02:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:02:24,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:24,327 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:24,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-13 15:02:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-13 15:02:24,528 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2029883948, now seen corresponding path program 53 times [2022-12-13 15:02:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109012533] [2022-12-13 15:02:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:24,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109012533] [2022-12-13 15:02:24,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109012533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243064315] [2022-12-13 15:02:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:02:24,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:24,601 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 15:02:24,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:02:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:24,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243064315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:24,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:02:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559372769] [2022-12-13 15:02:24,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:24,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:24,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1211 transitions, 34854 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:02:24,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:24,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:24,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:28,870 INFO L130 PetriNetUnfolder]: 3163/6382 cut-off events. [2022-12-13 15:02:28,870 INFO L131 PetriNetUnfolder]: For 430097/430097 co-relation queries the response was YES. [2022-12-13 15:02:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80629 conditions, 6382 events. 3163/6382 cut-off events. For 430097/430097 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 52664 event pairs, 390 based on Foata normal form. 64/6446 useless extension candidates. Maximal degree in co-relation 80442. Up to 2000 conditions per place. [2022-12-13 15:02:28,972 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 733 selfloop transitions, 635 changer transitions 11/1379 dead transitions. [2022-12-13 15:02:28,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 1379 transitions, 41266 flow [2022-12-13 15:02:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 15:02:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 15:02:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6151 transitions. [2022-12-13 15:02:28,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4341780193407214 [2022-12-13 15:02:28,980 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6151 transitions. [2022-12-13 15:02:28,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6151 transitions. [2022-12-13 15:02:28,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:28,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6151 transitions. [2022-12-13 15:02:28,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 198.41935483870967) internal successors, (6151), 31 states have internal predecessors, (6151), 0 states have call successors, (0), 0 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 15:02:28,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 457.0) internal successors, (14624), 32 states have internal predecessors, (14624), 0 states have call successors, (0), 0 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 15:02:28,996 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 457.0) internal successors, (14624), 32 states have internal predecessors, (14624), 0 states have call successors, (0), 0 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 15:02:28,996 INFO L175 Difference]: Start difference. First operand has 518 places, 1211 transitions, 34854 flow. Second operand 31 states and 6151 transitions. [2022-12-13 15:02:28,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 1379 transitions, 41266 flow [2022-12-13 15:02:34,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1379 transitions, 39101 flow, removed 867 selfloop flow, removed 12 redundant places. [2022-12-13 15:02:34,038 INFO L231 Difference]: Finished difference. Result has 537 places, 1209 transitions, 35011 flow [2022-12-13 15:02:34,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=32513, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35011, PETRI_PLACES=537, PETRI_TRANSITIONS=1209} [2022-12-13 15:02:34,039 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 517 predicate places. [2022-12-13 15:02:34,039 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1209 transitions, 35011 flow [2022-12-13 15:02:34,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:02:34,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:34,039 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:34,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-13 15:02:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:34,241 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 966379716, now seen corresponding path program 54 times [2022-12-13 15:02:34,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:34,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507821020] [2022-12-13 15:02:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:34,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507821020] [2022-12-13 15:02:34,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507821020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918147121] [2022-12-13 15:02:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:34,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:34,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:34,347 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:34,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 15:02:34,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:02:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:34,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:34,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918147121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:34,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:34,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 15:02:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603290129] [2022-12-13 15:02:34,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:02:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:02:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:02:34,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:34,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1209 transitions, 35011 flow. Second operand has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 0 states have call successors, (0), 0 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 15:02:34,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:34,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:38,447 INFO L130 PetriNetUnfolder]: 3140/6313 cut-off events. [2022-12-13 15:02:38,447 INFO L131 PetriNetUnfolder]: For 392497/392497 co-relation queries the response was YES. [2022-12-13 15:02:38,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79202 conditions, 6313 events. 3140/6313 cut-off events. For 392497/392497 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51793 event pairs, 607 based on Foata normal form. 8/6321 useless extension candidates. Maximal degree in co-relation 79016. Up to 3071 conditions per place. [2022-12-13 15:02:38,548 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 822 selfloop transitions, 469 changer transitions 18/1309 dead transitions. [2022-12-13 15:02:38,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1309 transitions, 39206 flow [2022-12-13 15:02:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:02:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:02:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4748 transitions. [2022-12-13 15:02:38,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43289569657184535 [2022-12-13 15:02:38,554 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4748 transitions. [2022-12-13 15:02:38,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4748 transitions. [2022-12-13 15:02:38,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:38,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4748 transitions. [2022-12-13 15:02:38,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 197.83333333333334) internal successors, (4748), 24 states have internal predecessors, (4748), 0 states have call successors, (0), 0 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 15:02:38,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 15:02:38,567 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 15:02:38,567 INFO L175 Difference]: Start difference. First operand has 537 places, 1209 transitions, 35011 flow. Second operand 24 states and 4748 transitions. [2022-12-13 15:02:38,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1309 transitions, 39206 flow [2022-12-13 15:02:43,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1309 transitions, 38090 flow, removed 268 selfloop flow, removed 19 redundant places. [2022-12-13 15:02:43,341 INFO L231 Difference]: Finished difference. Result has 539 places, 1197 transitions, 34462 flow [2022-12-13 15:02:43,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=33834, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=34462, PETRI_PLACES=539, PETRI_TRANSITIONS=1197} [2022-12-13 15:02:43,342 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 519 predicate places. [2022-12-13 15:02:43,342 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1197 transitions, 34462 flow [2022-12-13 15:02:43,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 0 states have call successors, (0), 0 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 15:02:43,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:43,343 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:43,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-13 15:02:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:43,544 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 823385267, now seen corresponding path program 55 times [2022-12-13 15:02:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067342631] [2022-12-13 15:02:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:43,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067342631] [2022-12-13 15:02:43,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067342631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:43,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217148392] [2022-12-13 15:02:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:43,634 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:43,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 15:02:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:43,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:43,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217148392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:43,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:43,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-13 15:02:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227368496] [2022-12-13 15:02:43,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:43,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:43,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:43,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1197 transitions, 34462 flow. Second operand has 15 states, 15 states have (on average 195.13333333333333) internal successors, (2927), 15 states have internal predecessors, (2927), 0 states have call successors, (0), 0 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 15:02:43,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:43,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:49,204 INFO L130 PetriNetUnfolder]: 3573/7216 cut-off events. [2022-12-13 15:02:49,204 INFO L131 PetriNetUnfolder]: For 467895/467895 co-relation queries the response was YES. [2022-12-13 15:02:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91026 conditions, 7216 events. 3573/7216 cut-off events. For 467895/467895 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 61275 event pairs, 164 based on Foata normal form. 166/7382 useless extension candidates. Maximal degree in co-relation 90840. Up to 3272 conditions per place. [2022-12-13 15:02:49,299 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 895 selfloop transitions, 574 changer transitions 1/1470 dead transitions. [2022-12-13 15:02:49,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1470 transitions, 44897 flow [2022-12-13 15:02:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:02:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:02:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4584 transitions. [2022-12-13 15:02:49,303 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4361145466653982 [2022-12-13 15:02:49,303 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4584 transitions. [2022-12-13 15:02:49,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4584 transitions. [2022-12-13 15:02:49,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:49,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4584 transitions. [2022-12-13 15:02:49,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 199.30434782608697) internal successors, (4584), 23 states have internal predecessors, (4584), 0 states have call successors, (0), 0 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 15:02:49,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:02:49,312 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 457.0) internal successors, (10968), 24 states have internal predecessors, (10968), 0 states have call successors, (0), 0 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 15:02:49,312 INFO L175 Difference]: Start difference. First operand has 539 places, 1197 transitions, 34462 flow. Second operand 23 states and 4584 transitions. [2022-12-13 15:02:49,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1470 transitions, 44897 flow [2022-12-13 15:02:54,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1470 transitions, 44137 flow, removed 51 selfloop flow, removed 16 redundant places. [2022-12-13 15:02:54,366 INFO L231 Difference]: Finished difference. Result has 547 places, 1327 transitions, 39932 flow [2022-12-13 15:02:54,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=33457, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=39932, PETRI_PLACES=547, PETRI_TRANSITIONS=1327} [2022-12-13 15:02:54,367 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 527 predicate places. [2022-12-13 15:02:54,367 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1327 transitions, 39932 flow [2022-12-13 15:02:54,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 195.13333333333333) internal successors, (2927), 15 states have internal predecessors, (2927), 0 states have call successors, (0), 0 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 15:02:54,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:54,368 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:54,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 15:02:54,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-13 15:02:54,569 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1587267803, now seen corresponding path program 56 times [2022-12-13 15:02:54,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485481019] [2022-12-13 15:02:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:54,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485481019] [2022-12-13 15:02:54,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485481019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266937861] [2022-12-13 15:02:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:02:54,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:54,644 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:54,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 15:02:54,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:54,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266937861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:54,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:54,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-13 15:02:54,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857840772] [2022-12-13 15:02:54,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:54,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:54,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:54,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:02:54,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1327 transitions, 39932 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:02:54,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:54,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:02:54,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:00,381 INFO L130 PetriNetUnfolder]: 3524/7091 cut-off events. [2022-12-13 15:03:00,381 INFO L131 PetriNetUnfolder]: For 465813/465813 co-relation queries the response was YES. [2022-12-13 15:03:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92173 conditions, 7091 events. 3524/7091 cut-off events. For 465813/465813 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 59711 event pairs, 158 based on Foata normal form. 40/7131 useless extension candidates. Maximal degree in co-relation 91982. Up to 2288 conditions per place. [2022-12-13 15:03:00,527 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 759 selfloop transitions, 673 changer transitions 6/1438 dead transitions. [2022-12-13 15:03:00,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1438 transitions, 44879 flow [2022-12-13 15:03:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:03:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:03:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6329 transitions. [2022-12-13 15:03:00,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43278172866520787 [2022-12-13 15:03:00,532 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6329 transitions. [2022-12-13 15:03:00,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6329 transitions. [2022-12-13 15:03:00,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:00,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6329 transitions. [2022-12-13 15:03:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 197.78125) internal successors, (6329), 32 states have internal predecessors, (6329), 0 states have call successors, (0), 0 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 15:03:00,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:03:00,548 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:03:00,548 INFO L175 Difference]: Start difference. First operand has 547 places, 1327 transitions, 39932 flow. Second operand 32 states and 6329 transitions. [2022-12-13 15:03:00,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1438 transitions, 44879 flow [2022-12-13 15:03:06,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1438 transitions, 43905 flow, removed 304 selfloop flow, removed 16 redundant places. [2022-12-13 15:03:06,174 INFO L231 Difference]: Finished difference. Result has 564 places, 1330 transitions, 40743 flow [2022-12-13 15:03:06,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=38026, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=40743, PETRI_PLACES=564, PETRI_TRANSITIONS=1330} [2022-12-13 15:03:06,175 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 544 predicate places. [2022-12-13 15:03:06,175 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1330 transitions, 40743 flow [2022-12-13 15:03:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:03:06,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:06,176 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:06,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-13 15:03:06,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-13 15:03:06,377 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 436723947, now seen corresponding path program 57 times [2022-12-13 15:03:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7735516] [2022-12-13 15:03:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:06,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7735516] [2022-12-13 15:03:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7735516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937365101] [2022-12-13 15:03:06,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:03:06,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:06,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:06,476 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 15:03:06,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:03:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:06,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:03:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:06,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:06,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937365101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:06,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:06,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 15:03:06,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107805023] [2022-12-13 15:03:06,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:06,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:03:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:03:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:03:06,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:03:06,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1330 transitions, 40743 flow. Second operand has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 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 15:03:06,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:06,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:03:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:11,980 INFO L130 PetriNetUnfolder]: 3596/7203 cut-off events. [2022-12-13 15:03:11,980 INFO L131 PetriNetUnfolder]: For 469728/469728 co-relation queries the response was YES. [2022-12-13 15:03:12,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95573 conditions, 7203 events. 3596/7203 cut-off events. For 469728/469728 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 60530 event pairs, 180 based on Foata normal form. 14/7217 useless extension candidates. Maximal degree in co-relation 95384. Up to 2304 conditions per place. [2022-12-13 15:03:12,092 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 750 selfloop transitions, 690 changer transitions 9/1449 dead transitions. [2022-12-13 15:03:12,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 1449 transitions, 46815 flow [2022-12-13 15:03:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:03:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 15:03:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5928 transitions. [2022-12-13 15:03:12,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4323851203501094 [2022-12-13 15:03:12,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5928 transitions. [2022-12-13 15:03:12,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5928 transitions. [2022-12-13 15:03:12,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:12,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5928 transitions. [2022-12-13 15:03:12,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 197.6) internal successors, (5928), 30 states have internal predecessors, (5928), 0 states have call successors, (0), 0 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 15:03:12,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 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 15:03:12,108 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 457.0) internal successors, (14167), 31 states have internal predecessors, (14167), 0 states have call successors, (0), 0 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 15:03:12,108 INFO L175 Difference]: Start difference. First operand has 564 places, 1330 transitions, 40743 flow. Second operand 30 states and 5928 transitions. [2022-12-13 15:03:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 1449 transitions, 46815 flow [2022-12-13 15:03:18,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 1449 transitions, 44985 flow, removed 789 selfloop flow, removed 11 redundant places. [2022-12-13 15:03:18,148 INFO L231 Difference]: Finished difference. Result has 588 places, 1360 transitions, 42820 flow [2022-12-13 15:03:18,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=39336, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=42820, PETRI_PLACES=588, PETRI_TRANSITIONS=1360} [2022-12-13 15:03:18,149 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 568 predicate places. [2022-12-13 15:03:18,149 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 1360 transitions, 42820 flow [2022-12-13 15:03:18,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 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 15:03:18,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:18,150 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:18,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-12-13 15:03:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-13 15:03:18,351 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1438359021, now seen corresponding path program 58 times [2022-12-13 15:03:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726494330] [2022-12-13 15:03:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:18,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:18,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726494330] [2022-12-13 15:03:18,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726494330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160595352] [2022-12-13 15:03:18,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:03:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:18,456 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:18,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 15:03:18,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:03:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:03:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:18,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:03:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160595352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:18,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-13 15:03:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595483739] [2022-12-13 15:03:18,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:03:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:03:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:03:18,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:03:18,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 1360 transitions, 42820 flow. Second operand has 18 states, 18 states have (on average 194.66666666666666) internal successors, (3504), 18 states have internal predecessors, (3504), 0 states have call successors, (0), 0 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 15:03:18,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:18,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:03:18,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:24,155 INFO L130 PetriNetUnfolder]: 3877/7824 cut-off events. [2022-12-13 15:03:24,155 INFO L131 PetriNetUnfolder]: For 545539/545539 co-relation queries the response was YES. [2022-12-13 15:03:24,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106220 conditions, 7824 events. 3877/7824 cut-off events. For 545539/545539 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 67131 event pairs, 210 based on Foata normal form. 34/7858 useless extension candidates. Maximal degree in co-relation 106026. Up to 2199 conditions per place. [2022-12-13 15:03:24,284 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 759 selfloop transitions, 809 changer transitions 10/1578 dead transitions. [2022-12-13 15:03:24,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1578 transitions, 52633 flow [2022-12-13 15:03:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 15:03:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 15:03:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6727 transitions. [2022-12-13 15:03:24,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329386021366971 [2022-12-13 15:03:24,288 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6727 transitions. [2022-12-13 15:03:24,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6727 transitions. [2022-12-13 15:03:24,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:24,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6727 transitions. [2022-12-13 15:03:24,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 197.85294117647058) internal successors, (6727), 34 states have internal predecessors, (6727), 0 states have call successors, (0), 0 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 15:03:24,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 457.0) internal successors, (15995), 35 states have internal predecessors, (15995), 0 states have call successors, (0), 0 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 15:03:24,300 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 457.0) internal successors, (15995), 35 states have internal predecessors, (15995), 0 states have call successors, (0), 0 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 15:03:24,300 INFO L175 Difference]: Start difference. First operand has 588 places, 1360 transitions, 42820 flow. Second operand 34 states and 6727 transitions. [2022-12-13 15:03:24,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1578 transitions, 52633 flow [2022-12-13 15:03:32,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1578 transitions, 52043 flow, removed 207 selfloop flow, removed 12 redundant places. [2022-12-13 15:03:32,369 INFO L231 Difference]: Finished difference. Result has 613 places, 1456 transitions, 49199 flow [2022-12-13 15:03:32,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=42140, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49199, PETRI_PLACES=613, PETRI_TRANSITIONS=1456} [2022-12-13 15:03:32,370 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 593 predicate places. [2022-12-13 15:03:32,370 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1456 transitions, 49199 flow [2022-12-13 15:03:32,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.66666666666666) internal successors, (3504), 18 states have internal predecessors, (3504), 0 states have call successors, (0), 0 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 15:03:32,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:32,370 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:32,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-13 15:03:32,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-13 15:03:32,571 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash -242406169, now seen corresponding path program 59 times [2022-12-13 15:03:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362445705] [2022-12-13 15:03:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:32,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362445705] [2022-12-13 15:03:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362445705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237187056] [2022-12-13 15:03:32,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:03:32,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:32,662 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:32,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 15:03:32,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:03:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:03:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:32,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:32,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237187056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:32,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:32,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 15:03:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572977631] [2022-12-13 15:03:32,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:32,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:03:32,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:03:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:03:32,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:03:32,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1456 transitions, 49199 flow. Second operand has 20 states, 20 states have (on average 194.55) internal successors, (3891), 20 states have internal predecessors, (3891), 0 states have call successors, (0), 0 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 15:03:32,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:32,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:03:32,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:39,197 INFO L130 PetriNetUnfolder]: 4073/8228 cut-off events. [2022-12-13 15:03:39,197 INFO L131 PetriNetUnfolder]: For 651772/651772 co-relation queries the response was YES. [2022-12-13 15:03:39,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117317 conditions, 8228 events. 4073/8228 cut-off events. For 651772/651772 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 71138 event pairs, 214 based on Foata normal form. 12/8240 useless extension candidates. Maximal degree in co-relation 117118. Up to 2171 conditions per place. [2022-12-13 15:03:39,348 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 786 selfloop transitions, 834 changer transitions 10/1630 dead transitions. [2022-12-13 15:03:39,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1630 transitions, 58088 flow [2022-12-13 15:03:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:03:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:03:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6326 transitions. [2022-12-13 15:03:39,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4325765864332604 [2022-12-13 15:03:39,355 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6326 transitions. [2022-12-13 15:03:39,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6326 transitions. [2022-12-13 15:03:39,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:39,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6326 transitions. [2022-12-13 15:03:39,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 197.6875) internal successors, (6326), 32 states have internal predecessors, (6326), 0 states have call successors, (0), 0 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 15:03:39,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:03:39,370 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:03:39,370 INFO L175 Difference]: Start difference. First operand has 613 places, 1456 transitions, 49199 flow. Second operand 32 states and 6326 transitions. [2022-12-13 15:03:39,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1630 transitions, 58088 flow [2022-12-13 15:03:49,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 1630 transitions, 54997 flow, removed 1458 selfloop flow, removed 16 redundant places. [2022-12-13 15:03:49,325 INFO L231 Difference]: Finished difference. Result has 634 places, 1529 transitions, 52875 flow [2022-12-13 15:03:49,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=47322, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=753, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=52875, PETRI_PLACES=634, PETRI_TRANSITIONS=1529} [2022-12-13 15:03:49,326 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 614 predicate places. [2022-12-13 15:03:49,326 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1529 transitions, 52875 flow [2022-12-13 15:03:49,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 194.55) internal successors, (3891), 20 states have internal predecessors, (3891), 0 states have call successors, (0), 0 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 15:03:49,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:49,326 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:49,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-13 15:03:49,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:49,527 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1869241335, now seen corresponding path program 60 times [2022-12-13 15:03:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156553665] [2022-12-13 15:03:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156553665] [2022-12-13 15:03:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156553665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121547159] [2022-12-13 15:03:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:03:49,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:49,631 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:49,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-13 15:03:49,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:03:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:03:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:49,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:49,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121547159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:49,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:49,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-13 15:03:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904822665] [2022-12-13 15:03:49,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:49,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:03:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:03:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:03:49,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:03:49,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1529 transitions, 52875 flow. Second operand has 17 states, 17 states have (on average 194.94117647058823) internal successors, (3314), 17 states have internal predecessors, (3314), 0 states have call successors, (0), 0 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 15:03:49,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:49,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:03:49,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:57,644 INFO L130 PetriNetUnfolder]: 4849/9846 cut-off events. [2022-12-13 15:03:57,645 INFO L131 PetriNetUnfolder]: For 759333/759333 co-relation queries the response was YES. [2022-12-13 15:03:57,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140789 conditions, 9846 events. 4849/9846 cut-off events. For 759333/759333 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 88382 event pairs, 278 based on Foata normal form. 48/9894 useless extension candidates. Maximal degree in co-relation 140582. Up to 3172 conditions per place. [2022-12-13 15:03:57,815 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 995 selfloop transitions, 928 changer transitions 0/1923 dead transitions. [2022-12-13 15:03:57,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1923 transitions, 70482 flow [2022-12-13 15:03:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:03:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:03:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4784 transitions. [2022-12-13 15:03:57,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4361779722830051 [2022-12-13 15:03:57,818 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4784 transitions. [2022-12-13 15:03:57,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4784 transitions. [2022-12-13 15:03:57,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:57,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4784 transitions. [2022-12-13 15:03:57,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 199.33333333333334) internal successors, (4784), 24 states have internal predecessors, (4784), 0 states have call successors, (0), 0 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 15:03:57,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 15:03:57,827 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 457.0) internal successors, (11425), 25 states have internal predecessors, (11425), 0 states have call successors, (0), 0 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 15:03:57,827 INFO L175 Difference]: Start difference. First operand has 634 places, 1529 transitions, 52875 flow. Second operand 24 states and 4784 transitions. [2022-12-13 15:03:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1923 transitions, 70482 flow [2022-12-13 15:04:10,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1923 transitions, 69327 flow, removed 243 selfloop flow, removed 17 redundant places. [2022-12-13 15:04:10,922 INFO L231 Difference]: Finished difference. Result has 642 places, 1751 transitions, 64381 flow [2022-12-13 15:04:10,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=51622, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=64381, PETRI_PLACES=642, PETRI_TRANSITIONS=1751} [2022-12-13 15:04:10,924 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2022-12-13 15:04:10,924 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1751 transitions, 64381 flow [2022-12-13 15:04:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 194.94117647058823) internal successors, (3314), 17 states have internal predecessors, (3314), 0 states have call successors, (0), 0 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 15:04:10,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:10,925 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:10,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-12-13 15:04:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:11,126 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash 150142135, now seen corresponding path program 61 times [2022-12-13 15:04:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:11,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133738135] [2022-12-13 15:04:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:11,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:11,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133738135] [2022-12-13 15:04:11,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133738135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:11,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042225774] [2022-12-13 15:04:11,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:04:11,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:11,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:11,225 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:11,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-13 15:04:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:11,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:04:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:11,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:11,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042225774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:11,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:11,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 15:04:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924391204] [2022-12-13 15:04:11,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:04:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:04:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:04:11,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:04:11,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1751 transitions, 64381 flow. Second operand has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 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 15:04:11,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:11,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:04:11,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:21,703 INFO L130 PetriNetUnfolder]: 5214/10653 cut-off events. [2022-12-13 15:04:21,703 INFO L131 PetriNetUnfolder]: For 884087/884087 co-relation queries the response was YES. [2022-12-13 15:04:21,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156319 conditions, 10653 events. 5214/10653 cut-off events. For 884087/884087 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 97557 event pairs, 808 based on Foata normal form. 22/10675 useless extension candidates. Maximal degree in co-relation 156106. Up to 3136 conditions per place. [2022-12-13 15:04:21,871 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1199 selfloop transitions, 783 changer transitions 11/1993 dead transitions. [2022-12-13 15:04:21,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 1993 transitions, 75515 flow [2022-12-13 15:04:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:04:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:04:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6328 transitions. [2022-12-13 15:04:21,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327133479212254 [2022-12-13 15:04:21,876 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6328 transitions. [2022-12-13 15:04:21,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6328 transitions. [2022-12-13 15:04:21,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:21,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6328 transitions. [2022-12-13 15:04:21,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 197.75) internal successors, (6328), 32 states have internal predecessors, (6328), 0 states have call successors, (0), 0 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 15:04:21,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:04:21,888 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 457.0) internal successors, (15081), 33 states have internal predecessors, (15081), 0 states have call successors, (0), 0 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 15:04:21,888 INFO L175 Difference]: Start difference. First operand has 642 places, 1751 transitions, 64381 flow. Second operand 32 states and 6328 transitions. [2022-12-13 15:04:21,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 1993 transitions, 75515 flow [2022-12-13 15:04:38,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 1993 transitions, 74250 flow, removed 523 selfloop flow, removed 12 redundant places. [2022-12-13 15:04:38,504 INFO L231 Difference]: Finished difference. Result has 673 places, 1889 transitions, 71518 flow [2022-12-13 15:04:38,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=63071, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=640, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=71518, PETRI_PLACES=673, PETRI_TRANSITIONS=1889} [2022-12-13 15:04:38,505 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 653 predicate places. [2022-12-13 15:04:38,505 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1889 transitions, 71518 flow [2022-12-13 15:04:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 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 15:04:38,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:38,505 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:38,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-13 15:04:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:38,706 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2144602915, now seen corresponding path program 62 times [2022-12-13 15:04:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592487326] [2022-12-13 15:04:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:38,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:38,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:38,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592487326] [2022-12-13 15:04:38,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592487326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:38,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527606323] [2022-12-13 15:04:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:04:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:38,804 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:38,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-13 15:04:38,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:04:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:04:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:38,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:38,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527606323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:38,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:38,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 15:04:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121694989] [2022-12-13 15:04:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:04:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:04:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:04:39,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:04:39,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1889 transitions, 71518 flow. Second operand has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 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 15:04:39,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:39,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:04:39,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:49,383 INFO L130 PetriNetUnfolder]: 5222/10671 cut-off events. [2022-12-13 15:04:49,384 INFO L131 PetriNetUnfolder]: For 920088/920088 co-relation queries the response was YES. [2022-12-13 15:04:49,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158430 conditions, 10671 events. 5222/10671 cut-off events. For 920088/920088 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 97924 event pairs, 995 based on Foata normal form. 2/10673 useless extension candidates. Maximal degree in co-relation 158206. Up to 5272 conditions per place. [2022-12-13 15:04:49,690 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1289 selfloop transitions, 645 changer transitions 7/1941 dead transitions. [2022-12-13 15:04:49,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 1941 transitions, 76863 flow [2022-12-13 15:04:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:04:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:04:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2767 transitions. [2022-12-13 15:04:49,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43247889965614256 [2022-12-13 15:04:49,693 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2767 transitions. [2022-12-13 15:04:49,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2767 transitions. [2022-12-13 15:04:49,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:49,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2767 transitions. [2022-12-13 15:04:49,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 197.64285714285714) internal successors, (2767), 14 states have internal predecessors, (2767), 0 states have call successors, (0), 0 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 15:04:49,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:04:49,700 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:04:49,700 INFO L175 Difference]: Start difference. First operand has 673 places, 1889 transitions, 71518 flow. Second operand 14 states and 2767 transitions. [2022-12-13 15:04:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 1941 transitions, 76863 flow [2022-12-13 15:05:08,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1941 transitions, 74498 flow, removed 940 selfloop flow, removed 12 redundant places. [2022-12-13 15:05:08,281 INFO L231 Difference]: Finished difference. Result has 679 places, 1897 transitions, 71482 flow [2022-12-13 15:05:08,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=69160, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=71482, PETRI_PLACES=679, PETRI_TRANSITIONS=1897} [2022-12-13 15:05:08,282 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 659 predicate places. [2022-12-13 15:05:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 1897 transitions, 71482 flow [2022-12-13 15:05:08,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.85714285714286) internal successors, (2728), 14 states have internal predecessors, (2728), 0 states have call successors, (0), 0 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 15:05:08,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:08,282 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:08,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-13 15:05:08,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:08,484 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash -842756821, now seen corresponding path program 63 times [2022-12-13 15:05:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417591825] [2022-12-13 15:05:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:08,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:08,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:08,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417591825] [2022-12-13 15:05:08,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417591825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:08,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81542196] [2022-12-13 15:05:08,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:05:08,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:08,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:08,575 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:08,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-13 15:05:08,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:05:08,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:05:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:08,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:08,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81542196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:08,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:08,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 15:05:08,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402405490] [2022-12-13 15:05:08,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:08,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:05:08,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:05:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:05:08,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:05:08,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1897 transitions, 71482 flow. Second operand has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 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 15:05:08,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:08,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:05:08,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:19,387 INFO L130 PetriNetUnfolder]: 5216/10665 cut-off events. [2022-12-13 15:05:19,387 INFO L131 PetriNetUnfolder]: For 879932/879932 co-relation queries the response was YES. [2022-12-13 15:05:19,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158479 conditions, 10665 events. 5216/10665 cut-off events. For 879932/879932 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 98121 event pairs, 777 based on Foata normal form. 4/10669 useless extension candidates. Maximal degree in co-relation 158250. Up to 3105 conditions per place. [2022-12-13 15:05:19,570 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1148 selfloop transitions, 820 changer transitions 4/1972 dead transitions. [2022-12-13 15:05:19,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 1972 transitions, 76571 flow [2022-12-13 15:05:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 15:05:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 15:05:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5138 transitions. [2022-12-13 15:05:19,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43241878471637774 [2022-12-13 15:05:19,574 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5138 transitions. [2022-12-13 15:05:19,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5138 transitions. [2022-12-13 15:05:19,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:19,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5138 transitions. [2022-12-13 15:05:19,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 197.6153846153846) internal successors, (5138), 26 states have internal predecessors, (5138), 0 states have call successors, (0), 0 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 15:05:19,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 457.0) internal successors, (12339), 27 states have internal predecessors, (12339), 0 states have call successors, (0), 0 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 15:05:19,583 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 457.0) internal successors, (12339), 27 states have internal predecessors, (12339), 0 states have call successors, (0), 0 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 15:05:19,583 INFO L175 Difference]: Start difference. First operand has 679 places, 1897 transitions, 71482 flow. Second operand 26 states and 5138 transitions. [2022-12-13 15:05:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 1972 transitions, 76571 flow [2022-12-13 15:05:37,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1972 transitions, 76175 flow, removed 71 selfloop flow, removed 7 redundant places. [2022-12-13 15:05:37,484 INFO L231 Difference]: Finished difference. Result has 698 places, 1898 transitions, 73232 flow [2022-12-13 15:05:37,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=71111, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=73232, PETRI_PLACES=698, PETRI_TRANSITIONS=1898} [2022-12-13 15:05:37,485 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 678 predicate places. [2022-12-13 15:05:37,485 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 1898 transitions, 73232 flow [2022-12-13 15:05:37,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 194.75) internal successors, (3116), 16 states have internal predecessors, (3116), 0 states have call successors, (0), 0 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 15:05:37,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:37,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:37,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-13 15:05:37,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:37,686 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 400363248, now seen corresponding path program 64 times [2022-12-13 15:05:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314573725] [2022-12-13 15:05:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:37,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:37,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314573725] [2022-12-13 15:05:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314573725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459896004] [2022-12-13 15:05:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:05:37,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:37,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:37,783 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-13 15:05:37,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:05:37,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:05:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:37,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:37,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459896004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:37,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:37,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 15:05:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805523582] [2022-12-13 15:05:37,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:05:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:05:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:05:38,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:05:38,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 1898 transitions, 73232 flow. Second operand has 14 states, 14 states have (on average 195.0) internal successors, (2730), 14 states have internal predecessors, (2730), 0 states have call successors, (0), 0 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 15:05:38,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:38,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:05:38,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:48,045 INFO L130 PetriNetUnfolder]: 5355/10890 cut-off events. [2022-12-13 15:05:48,045 INFO L131 PetriNetUnfolder]: For 922508/922508 co-relation queries the response was YES. [2022-12-13 15:05:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164921 conditions, 10890 events. 5355/10890 cut-off events. For 922508/922508 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 99718 event pairs, 255 based on Foata normal form. 30/10920 useless extension candidates. Maximal degree in co-relation 164690. Up to 8347 conditions per place. [2022-12-13 15:05:48,234 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 1533 selfloop transitions, 476 changer transitions 0/2009 dead transitions. [2022-12-13 15:05:48,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 2009 transitions, 80447 flow [2022-12-13 15:05:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:05:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:05:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1795 transitions. [2022-12-13 15:05:48,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4364211038171651 [2022-12-13 15:05:48,236 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1795 transitions. [2022-12-13 15:05:48,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1795 transitions. [2022-12-13 15:05:48,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:48,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1795 transitions. [2022-12-13 15:05:48,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 199.44444444444446) internal successors, (1795), 9 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:05:48,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:05:48,240 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 457.0) internal successors, (4570), 10 states have internal predecessors, (4570), 0 states have call successors, (0), 0 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 15:05:48,240 INFO L175 Difference]: Start difference. First operand has 698 places, 1898 transitions, 73232 flow. Second operand 9 states and 1795 transitions. [2022-12-13 15:05:48,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 2009 transitions, 80447 flow [2022-12-13 15:06:06,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 2009 transitions, 79093 flow, removed 172 selfloop flow, removed 15 redundant places. [2022-12-13 15:06:06,539 INFO L231 Difference]: Finished difference. Result has 693 places, 1950 transitions, 74652 flow [2022-12-13 15:06:06,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=71883, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=74652, PETRI_PLACES=693, PETRI_TRANSITIONS=1950} [2022-12-13 15:06:06,540 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 673 predicate places. [2022-12-13 15:06:06,540 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 1950 transitions, 74652 flow [2022-12-13 15:06:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 195.0) internal successors, (2730), 14 states have internal predecessors, (2730), 0 states have call successors, (0), 0 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 15:06:06,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:06,540 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:06,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-13 15:06:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-12-13 15:06:06,741 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:06:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:06,742 INFO L85 PathProgramCache]: Analyzing trace with hash 838008369, now seen corresponding path program 65 times [2022-12-13 15:06:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:06,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061850634] [2022-12-13 15:06:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:06,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061850634] [2022-12-13 15:06:06,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061850634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:06:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003766494] [2022-12-13 15:06:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:06:06,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:06:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:06,832 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:06:06,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-13 15:06:06,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:06:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:06:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:06:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:06,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003766494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:06,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:06:06,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:06:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261799635] [2022-12-13 15:06:06,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:06,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:06:06,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:06,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:06:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:06:07,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:06:07,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 1950 transitions, 74652 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:06:07,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:07,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:06:07,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:18,301 INFO L130 PetriNetUnfolder]: 5598/11377 cut-off events. [2022-12-13 15:06:18,301 INFO L131 PetriNetUnfolder]: For 989468/989468 co-relation queries the response was YES. [2022-12-13 15:06:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172038 conditions, 11377 events. 5598/11377 cut-off events. For 989468/989468 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 105096 event pairs, 757 based on Foata normal form. 18/11395 useless extension candidates. Maximal degree in co-relation 171804. Up to 2927 conditions per place. [2022-12-13 15:06:18,506 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1166 selfloop transitions, 964 changer transitions 9/2139 dead transitions. [2022-12-13 15:06:18,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 2139 transitions, 84283 flow [2022-12-13 15:06:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:06:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 15:06:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 5342 transitions. [2022-12-13 15:06:18,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329362184942054 [2022-12-13 15:06:18,510 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 5342 transitions. [2022-12-13 15:06:18,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 5342 transitions. [2022-12-13 15:06:18,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:18,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 5342 transitions. [2022-12-13 15:06:18,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 197.85185185185185) internal successors, (5342), 27 states have internal predecessors, (5342), 0 states have call successors, (0), 0 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 15:06:18,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 457.0) internal successors, (12796), 28 states have internal predecessors, (12796), 0 states have call successors, (0), 0 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 15:06:18,533 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 457.0) internal successors, (12796), 28 states have internal predecessors, (12796), 0 states have call successors, (0), 0 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 15:06:18,533 INFO L175 Difference]: Start difference. First operand has 693 places, 1950 transitions, 74652 flow. Second operand 27 states and 5342 transitions. [2022-12-13 15:06:18,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 2139 transitions, 84283 flow [2022-12-13 15:06:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 2139 transitions, 83459 flow, removed 37 selfloop flow, removed 8 redundant places. [2022-12-13 15:06:38,765 INFO L231 Difference]: Finished difference. Result has 714 places, 2020 transitions, 79823 flow [2022-12-13 15:06:38,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=73595, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=79823, PETRI_PLACES=714, PETRI_TRANSITIONS=2020} [2022-12-13 15:06:38,766 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 694 predicate places. [2022-12-13 15:06:38,766 INFO L495 AbstractCegarLoop]: Abstraction has has 714 places, 2020 transitions, 79823 flow [2022-12-13 15:06:38,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:06:38,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:38,767 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:38,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-13 15:06:38,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-12-13 15:06:38,968 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:06:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1652802816, now seen corresponding path program 66 times [2022-12-13 15:06:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637214911] [2022-12-13 15:06:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:38,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:39,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637214911] [2022-12-13 15:06:39,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637214911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:06:39,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361600832] [2022-12-13 15:06:39,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:06:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:06:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:39,066 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:06:39,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-13 15:06:39,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:06:39,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:06:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:06:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:39,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361600832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:39,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:06:39,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 15:06:39,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001043912] [2022-12-13 15:06:39,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:39,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:06:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:06:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:06:39,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:06:39,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 2020 transitions, 79823 flow. Second operand has 20 states, 20 states have (on average 194.7) internal successors, (3894), 20 states have internal predecessors, (3894), 0 states have call successors, (0), 0 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 15:06:39,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:39,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:06:39,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:51,812 INFO L130 PetriNetUnfolder]: 6255/12602 cut-off events. [2022-12-13 15:06:51,812 INFO L131 PetriNetUnfolder]: For 1240107/1240107 co-relation queries the response was YES. [2022-12-13 15:06:51,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196572 conditions, 12602 events. 6255/12602 cut-off events. For 1240107/1240107 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 117005 event pairs, 533 based on Foata normal form. 110/12712 useless extension candidates. Maximal degree in co-relation 196336. Up to 10467 conditions per place. [2022-12-13 15:06:52,042 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1916 selfloop transitions, 461 changer transitions 0/2377 dead transitions. [2022-12-13 15:06:52,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 2377 transitions, 96840 flow [2022-12-13 15:06:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 15:06:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 15:06:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 5155 transitions. [2022-12-13 15:06:52,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338495202827807 [2022-12-13 15:06:52,047 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 5155 transitions. [2022-12-13 15:06:52,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 5155 transitions. [2022-12-13 15:06:52,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:52,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 5155 transitions. [2022-12-13 15:06:52,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 198.26923076923077) internal successors, (5155), 26 states have internal predecessors, (5155), 0 states have call successors, (0), 0 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 15:06:52,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 457.0) internal successors, (12339), 27 states have internal predecessors, (12339), 0 states have call successors, (0), 0 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 15:06:52,056 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 457.0) internal successors, (12339), 27 states have internal predecessors, (12339), 0 states have call successors, (0), 0 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 15:06:52,056 INFO L175 Difference]: Start difference. First operand has 714 places, 2020 transitions, 79823 flow. Second operand 26 states and 5155 transitions. [2022-12-13 15:06:52,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 2377 transitions, 96840 flow [2022-12-13 15:07:17,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 2377 transitions, 94670 flow, removed 571 selfloop flow, removed 17 redundant places. [2022-12-13 15:07:17,911 INFO L231 Difference]: Finished difference. Result has 732 places, 2262 transitions, 88642 flow [2022-12-13 15:07:17,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=78017, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=88642, PETRI_PLACES=732, PETRI_TRANSITIONS=2262} [2022-12-13 15:07:17,912 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 712 predicate places. [2022-12-13 15:07:17,912 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 2262 transitions, 88642 flow [2022-12-13 15:07:17,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 194.7) internal successors, (3894), 20 states have internal predecessors, (3894), 0 states have call successors, (0), 0 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 15:07:17,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:17,912 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:17,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-13 15:07:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:18,113 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:07:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:18,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1933507930, now seen corresponding path program 67 times [2022-12-13 15:07:18,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:18,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636003384] [2022-12-13 15:07:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:18,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:18,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636003384] [2022-12-13 15:07:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636003384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:07:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016159573] [2022-12-13 15:07:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:07:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:18,175 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:07:18,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-13 15:07:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:07:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:18,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:07:18,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016159573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:18,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:07:18,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-13 15:07:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866348598] [2022-12-13 15:07:18,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:07:18,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:07:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:07:18,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:07:18,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2262 transitions, 88642 flow. Second operand has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 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 15:07:18,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:18,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:07:18,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:33,418 INFO L130 PetriNetUnfolder]: 6642/13443 cut-off events. [2022-12-13 15:07:33,418 INFO L131 PetriNetUnfolder]: For 1287388/1287388 co-relation queries the response was YES. [2022-12-13 15:07:33,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212363 conditions, 13443 events. 6642/13443 cut-off events. For 1287388/1287388 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 126908 event pairs, 203 based on Foata normal form. 104/13547 useless extension candidates. Maximal degree in co-relation 212118. Up to 5220 conditions per place. [2022-12-13 15:07:33,676 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1472 selfloop transitions, 1131 changer transitions 10/2613 dead transitions. [2022-12-13 15:07:33,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 766 places, 2613 transitions, 106322 flow [2022-12-13 15:07:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 15:07:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 15:07:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6939 transitions. [2022-12-13 15:07:33,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43382306970928414 [2022-12-13 15:07:33,681 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6939 transitions. [2022-12-13 15:07:33,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6939 transitions. [2022-12-13 15:07:33,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:33,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6939 transitions. [2022-12-13 15:07:33,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 198.25714285714287) internal successors, (6939), 35 states have internal predecessors, (6939), 0 states have call successors, (0), 0 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 15:07:33,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 457.0) internal successors, (16452), 36 states have internal predecessors, (16452), 0 states have call successors, (0), 0 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 15:07:33,694 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 457.0) internal successors, (16452), 36 states have internal predecessors, (16452), 0 states have call successors, (0), 0 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 15:07:33,694 INFO L175 Difference]: Start difference. First operand has 732 places, 2262 transitions, 88642 flow. Second operand 35 states and 6939 transitions. [2022-12-13 15:07:33,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 766 places, 2613 transitions, 106322 flow [2022-12-13 15:08:02,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 2613 transitions, 104199 flow, removed 1039 selfloop flow, removed 6 redundant places. [2022-12-13 15:08:02,563 INFO L231 Difference]: Finished difference. Result has 770 places, 2433 transitions, 98307 flow [2022-12-13 15:08:02,564 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=86428, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=957, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=98307, PETRI_PLACES=770, PETRI_TRANSITIONS=2433} [2022-12-13 15:08:02,564 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 750 predicate places. [2022-12-13 15:08:02,564 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 2433 transitions, 98307 flow [2022-12-13 15:08:02,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 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 15:08:02,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:02,565 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:02,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-13 15:08:02,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:02,766 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:08:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1273915528, now seen corresponding path program 68 times [2022-12-13 15:08:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203468126] [2022-12-13 15:08:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:02,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:02,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203468126] [2022-12-13 15:08:02,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203468126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:02,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140868672] [2022-12-13 15:08:02,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:08:02,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:02,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:02,875 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:02,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-13 15:08:02,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:08:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:08:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:08:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:03,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:03,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140868672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:03,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:08:03,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 15:08:03,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223380533] [2022-12-13 15:08:03,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:03,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:08:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:08:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:08:03,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:08:03,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 2433 transitions, 98307 flow. Second operand has 18 states, 18 states have (on average 194.77777777777777) internal successors, (3506), 18 states have internal predecessors, (3506), 0 states have call successors, (0), 0 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 15:08:03,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:03,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:08:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:18,840 INFO L130 PetriNetUnfolder]: 6762/13575 cut-off events. [2022-12-13 15:08:18,840 INFO L131 PetriNetUnfolder]: For 1310685/1310685 co-relation queries the response was YES. [2022-12-13 15:08:19,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218768 conditions, 13575 events. 6762/13575 cut-off events. For 1310685/1310685 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 127595 event pairs, 617 based on Foata normal form. 40/13615 useless extension candidates. Maximal degree in co-relation 218512. Up to 12326 conditions per place. [2022-12-13 15:08:19,271 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 2223 selfloop transitions, 351 changer transitions 0/2574 dead transitions. [2022-12-13 15:08:19,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 2574 transitions, 108024 flow [2022-12-13 15:08:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:08:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:08:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3956 transitions. [2022-12-13 15:08:19,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328227571115974 [2022-12-13 15:08:19,274 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3956 transitions. [2022-12-13 15:08:19,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3956 transitions. [2022-12-13 15:08:19,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:19,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3956 transitions. [2022-12-13 15:08:19,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.8) internal successors, (3956), 20 states have internal predecessors, (3956), 0 states have call successors, (0), 0 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 15:08:19,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 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 15:08:19,282 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 457.0) internal successors, (9597), 21 states have internal predecessors, (9597), 0 states have call successors, (0), 0 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 15:08:19,282 INFO L175 Difference]: Start difference. First operand has 770 places, 2433 transitions, 98307 flow. Second operand 20 states and 3956 transitions. [2022-12-13 15:08:19,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 2574 transitions, 108024 flow [2022-12-13 15:08:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 2574 transitions, 104202 flow, removed 1584 selfloop flow, removed 14 redundant places. [2022-12-13 15:08:51,650 INFO L231 Difference]: Finished difference. Result has 784 places, 2510 transitions, 98757 flow [2022-12-13 15:08:51,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=94398, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=98757, PETRI_PLACES=784, PETRI_TRANSITIONS=2510} [2022-12-13 15:08:51,651 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 764 predicate places. [2022-12-13 15:08:51,652 INFO L495 AbstractCegarLoop]: Abstraction has has 784 places, 2510 transitions, 98757 flow [2022-12-13 15:08:51,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.77777777777777) internal successors, (3506), 18 states have internal predecessors, (3506), 0 states have call successors, (0), 0 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 15:08:51,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:51,652 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:51,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-13 15:08:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-12-13 15:08:51,852 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:08:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -289387724, now seen corresponding path program 69 times [2022-12-13 15:08:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:51,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209361382] [2022-12-13 15:08:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:51,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209361382] [2022-12-13 15:08:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209361382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952025521] [2022-12-13 15:08:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:08:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:51,913 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:51,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-13 15:08:52,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:08:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:08:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:08:52,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:52,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:52,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952025521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:52,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:08:52,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 15:08:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011105487] [2022-12-13 15:08:52,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:52,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:08:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:08:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:08:52,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:08:52,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 2510 transitions, 98757 flow. Second operand has 16 states, 16 states have (on average 194.875) internal successors, (3118), 16 states have internal predecessors, (3118), 0 states have call successors, (0), 0 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 15:08:52,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:52,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:08:52,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:08,832 INFO L130 PetriNetUnfolder]: 6978/13943 cut-off events. [2022-12-13 15:09:08,832 INFO L131 PetriNetUnfolder]: For 1194435/1194435 co-relation queries the response was YES. [2022-12-13 15:09:09,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216655 conditions, 13943 events. 6978/13943 cut-off events. For 1194435/1194435 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 131073 event pairs, 505 based on Foata normal form. 12/13955 useless extension candidates. Maximal degree in co-relation 216392. Up to 12420 conditions per place. [2022-12-13 15:09:09,130 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 2283 selfloop transitions, 400 changer transitions 0/2683 dead transitions. [2022-12-13 15:09:09,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 2683 transitions, 109982 flow [2022-12-13 15:09:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:09:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:09:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2772 transitions. [2022-12-13 15:09:09,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43326039387308535 [2022-12-13 15:09:09,132 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2772 transitions. [2022-12-13 15:09:09,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2772 transitions. [2022-12-13 15:09:09,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:09:09,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2772 transitions. [2022-12-13 15:09:09,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 198.0) internal successors, (2772), 14 states have internal predecessors, (2772), 0 states have call successors, (0), 0 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 15:09:09,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:09:09,138 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 457.0) internal successors, (6855), 15 states have internal predecessors, (6855), 0 states have call successors, (0), 0 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 15:09:09,138 INFO L175 Difference]: Start difference. First operand has 784 places, 2510 transitions, 98757 flow. Second operand 14 states and 2772 transitions. [2022-12-13 15:09:09,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 2683 transitions, 109982 flow [2022-12-13 15:09:41,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 2683 transitions, 108523 flow, removed 396 selfloop flow, removed 10 redundant places. [2022-12-13 15:09:41,824 INFO L231 Difference]: Finished difference. Result has 791 places, 2608 transitions, 102353 flow [2022-12-13 15:09:41,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=97521, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=102353, PETRI_PLACES=791, PETRI_TRANSITIONS=2608} [2022-12-13 15:09:41,825 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 771 predicate places. [2022-12-13 15:09:41,825 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 2608 transitions, 102353 flow [2022-12-13 15:09:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 194.875) internal successors, (3118), 16 states have internal predecessors, (3118), 0 states have call successors, (0), 0 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 15:09:41,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:09:41,826 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:41,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-13 15:09:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:42,027 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:09:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1185983381, now seen corresponding path program 70 times [2022-12-13 15:09:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174165011] [2022-12-13 15:09:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:42,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:42,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174165011] [2022-12-13 15:09:42,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174165011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:42,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156999879] [2022-12-13 15:09:42,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:09:42,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:42,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:42,121 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:42,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-13 15:09:42,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:09:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:09:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:09:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:42,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:09:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:42,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156999879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:09:42,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:09:42,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:09:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716878263] [2022-12-13 15:09:42,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:09:42,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:09:42,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:09:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:09:42,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:09:42,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 2608 transitions, 102353 flow. Second operand has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:09:42,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:42,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:09:42,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:00,068 INFO L130 PetriNetUnfolder]: 7217/14446 cut-off events. [2022-12-13 15:10:00,069 INFO L131 PetriNetUnfolder]: For 1281247/1281247 co-relation queries the response was YES. [2022-12-13 15:10:00,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226484 conditions, 14446 events. 7217/14446 cut-off events. For 1281247/1281247 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 137073 event pairs, 1107 based on Foata normal form. 64/14510 useless extension candidates. Maximal degree in co-relation 226218. Up to 4349 conditions per place. [2022-12-13 15:10:00,403 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1621 selfloop transitions, 1188 changer transitions 8/2817 dead transitions. [2022-12-13 15:10:00,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 2817 transitions, 114511 flow [2022-12-13 15:10:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 15:10:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 15:10:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6132 transitions. [2022-12-13 15:10:00,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328368744264841 [2022-12-13 15:10:00,411 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6132 transitions. [2022-12-13 15:10:00,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6132 transitions. [2022-12-13 15:10:00,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:00,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6132 transitions. [2022-12-13 15:10:00,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 197.80645161290323) internal successors, (6132), 31 states have internal predecessors, (6132), 0 states have call successors, (0), 0 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 15:10:00,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 457.0) internal successors, (14624), 32 states have internal predecessors, (14624), 0 states have call successors, (0), 0 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 15:10:00,428 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 457.0) internal successors, (14624), 32 states have internal predecessors, (14624), 0 states have call successors, (0), 0 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 15:10:00,428 INFO L175 Difference]: Start difference. First operand has 791 places, 2608 transitions, 102353 flow. Second operand 31 states and 6132 transitions. [2022-12-13 15:10:00,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 2817 transitions, 114511 flow [2022-12-13 15:10:34,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 809 places, 2817 transitions, 114198 flow, removed 54 selfloop flow, removed 7 redundant places. [2022-12-13 15:10:34,595 INFO L231 Difference]: Finished difference. Result has 815 places, 2676 transitions, 109255 flow [2022-12-13 15:10:34,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=100763, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=109255, PETRI_PLACES=815, PETRI_TRANSITIONS=2676} [2022-12-13 15:10:34,597 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 795 predicate places. [2022-12-13 15:10:34,597 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 2676 transitions, 109255 flow [2022-12-13 15:10:34,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.8) internal successors, (2922), 15 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 15:10:34,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:34,597 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:34,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-13 15:10:34,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:34,798 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:10:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1268890683, now seen corresponding path program 71 times [2022-12-13 15:10:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832757603] [2022-12-13 15:10:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:34,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832757603] [2022-12-13 15:10:34,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832757603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:10:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112382145] [2022-12-13 15:10:34,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:10:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:34,886 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:10:34,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-13 15:10:34,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:10:34,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:10:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:10:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:35,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:35,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112382145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:35,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:10:35,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:10:35,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944251337] [2022-12-13 15:10:35,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:35,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:10:35,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:10:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:10:35,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:10:35,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 2676 transitions, 109255 flow. Second operand has 15 states, 15 states have (on average 195.0) internal successors, (2925), 15 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 15:10:35,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:35,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:10:35,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:53,659 INFO L130 PetriNetUnfolder]: 7207/14468 cut-off events. [2022-12-13 15:10:53,659 INFO L131 PetriNetUnfolder]: For 1412287/1412287 co-relation queries the response was YES. [2022-12-13 15:10:53,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232195 conditions, 14468 events. 7207/14468 cut-off events. For 1412287/1412287 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 137231 event pairs, 1769 based on Foata normal form. 156/14624 useless extension candidates. Maximal degree in co-relation 231926. Up to 8783 conditions per place. [2022-12-13 15:10:53,969 INFO L137 encePairwiseOnDemand]: 452/457 looper letters, 1902 selfloop transitions, 905 changer transitions 1/2808 dead transitions. [2022-12-13 15:10:53,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 2808 transitions, 118292 flow [2022-12-13 15:10:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:10:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:10:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4378 transitions. [2022-12-13 15:10:53,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2022-12-13 15:10:53,973 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4378 transitions. [2022-12-13 15:10:53,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4378 transitions. [2022-12-13 15:10:53,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:53,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4378 transitions. [2022-12-13 15:10:53,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 0 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 15:10:53,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:10:53,981 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:10:53,981 INFO L175 Difference]: Start difference. First operand has 815 places, 2676 transitions, 109255 flow. Second operand 22 states and 4378 transitions. [2022-12-13 15:10:53,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 2808 transitions, 118292 flow [2022-12-13 15:11:31,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 2808 transitions, 115286 flow, removed 823 selfloop flow, removed 28 redundant places. [2022-12-13 15:11:31,354 INFO L231 Difference]: Finished difference. Result has 802 places, 2678 transitions, 109216 flow [2022-12-13 15:11:31,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=105144, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=873, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=109216, PETRI_PLACES=802, PETRI_TRANSITIONS=2678} [2022-12-13 15:11:31,355 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 782 predicate places. [2022-12-13 15:11:31,355 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 2678 transitions, 109216 flow [2022-12-13 15:11:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 195.0) internal successors, (2925), 15 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 15:11:31,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:31,356 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:11:31,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-13 15:11:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-12-13 15:11:31,557 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:11:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:31,558 INFO L85 PathProgramCache]: Analyzing trace with hash -251330380, now seen corresponding path program 72 times [2022-12-13 15:11:31,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:31,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220541770] [2022-12-13 15:11:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:31,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:31,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220541770] [2022-12-13 15:11:31,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220541770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:11:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407102536] [2022-12-13 15:11:31,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:11:31,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:11:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:11:31,660 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:11:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-13 15:11:31,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:11:31,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:11:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:11:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:11:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:31,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:11:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:31,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407102536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:11:31,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:11:31,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:11:31,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908447662] [2022-12-13 15:11:31,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:11:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:11:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:11:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:11:31,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:11:31,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 2678 transitions, 109216 flow. Second operand has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:11:31,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:31,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:11:31,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:51,857 INFO L130 PetriNetUnfolder]: 7514/15123 cut-off events. [2022-12-13 15:11:51,857 INFO L131 PetriNetUnfolder]: For 1432830/1432830 co-relation queries the response was YES. [2022-12-13 15:11:52,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242756 conditions, 15123 events. 7514/15123 cut-off events. For 1432830/1432830 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 144621 event pairs, 513 based on Foata normal form. 68/15191 useless extension candidates. Maximal degree in co-relation 242486. Up to 10428 conditions per place. [2022-12-13 15:11:52,247 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1944 selfloop transitions, 978 changer transitions 0/2922 dead transitions. [2022-12-13 15:11:52,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 2922 transitions, 123372 flow [2022-12-13 15:11:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:11:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:11:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4378 transitions. [2022-12-13 15:11:52,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43544857768052514 [2022-12-13 15:11:52,250 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4378 transitions. [2022-12-13 15:11:52,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4378 transitions. [2022-12-13 15:11:52,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:52,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4378 transitions. [2022-12-13 15:11:52,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 199.0) internal successors, (4378), 22 states have internal predecessors, (4378), 0 states have call successors, (0), 0 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 15:11:52,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:11:52,259 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 457.0) internal successors, (10511), 23 states have internal predecessors, (10511), 0 states have call successors, (0), 0 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 15:11:52,259 INFO L175 Difference]: Start difference. First operand has 802 places, 2678 transitions, 109216 flow. Second operand 22 states and 4378 transitions. [2022-12-13 15:11:52,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 2922 transitions, 123372 flow [2022-12-13 15:12:32,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 809 places, 2922 transitions, 122110 flow, removed 221 selfloop flow, removed 14 redundant places. [2022-12-13 15:12:32,441 INFO L231 Difference]: Finished difference. Result has 816 places, 2782 transitions, 115759 flow [2022-12-13 15:12:32,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=107783, PETRI_DIFFERENCE_MINUEND_PLACES=788, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=115759, PETRI_PLACES=816, PETRI_TRANSITIONS=2782} [2022-12-13 15:12:32,443 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 796 predicate places. [2022-12-13 15:12:32,443 INFO L495 AbstractCegarLoop]: Abstraction has has 816 places, 2782 transitions, 115759 flow [2022-12-13 15:12:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.86666666666667) internal successors, (2923), 15 states have internal predecessors, (2923), 0 states have call successors, (0), 0 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 15:12:32,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:12:32,443 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:32,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-12-13 15:12:32,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:32,644 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:12:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1438767624, now seen corresponding path program 73 times [2022-12-13 15:12:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:32,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770250798] [2022-12-13 15:12:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:32,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:32,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770250798] [2022-12-13 15:12:32,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770250798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:32,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497340050] [2022-12-13 15:12:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:12:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:32,711 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:32,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dccd66-e033-4ae9-8f43-4c7e63c17622/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-13 15:12:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:12:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:32,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497340050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:32,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:32,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 15:12:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259840582] [2022-12-13 15:12:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:12:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:12:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:12:32,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 457 [2022-12-13 15:12:32,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 2782 transitions, 115759 flow. Second operand has 15 states, 15 states have (on average 194.93333333333334) internal successors, (2924), 15 states have internal predecessors, (2924), 0 states have call successors, (0), 0 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 15:12:32,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:12:32,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 457 [2022-12-13 15:12:32,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:12:52,443 INFO L130 PetriNetUnfolder]: 7330/14735 cut-off events. [2022-12-13 15:12:52,443 INFO L131 PetriNetUnfolder]: For 1400767/1400767 co-relation queries the response was YES. [2022-12-13 15:12:52,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240054 conditions, 14735 events. 7330/14735 cut-off events. For 1400767/1400767 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 140288 event pairs, 201 based on Foata normal form. 92/14827 useless extension candidates. Maximal degree in co-relation 239778. Up to 6216 conditions per place. [2022-12-13 15:12:52,766 INFO L137 encePairwiseOnDemand]: 451/457 looper letters, 1578 selfloop transitions, 1309 changer transitions 7/2894 dead transitions. [2022-12-13 15:12:52,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 2894 transitions, 125161 flow [2022-12-13 15:12:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:12:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:12:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5529 transitions. [2022-12-13 15:12:52,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43208815254767113 [2022-12-13 15:12:52,771 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5529 transitions. [2022-12-13 15:12:52,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5529 transitions. [2022-12-13 15:12:52,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:12:52,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5529 transitions. [2022-12-13 15:12:52,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 197.46428571428572) internal successors, (5529), 28 states have internal predecessors, (5529), 0 states have call successors, (0), 0 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 15:12:52,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 457.0) internal successors, (13253), 29 states have internal predecessors, (13253), 0 states have call successors, (0), 0 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 15:12:52,782 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 457.0) internal successors, (13253), 29 states have internal predecessors, (13253), 0 states have call successors, (0), 0 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 15:12:52,782 INFO L175 Difference]: Start difference. First operand has 816 places, 2782 transitions, 115759 flow. Second operand 28 states and 5529 transitions. [2022-12-13 15:12:52,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 2894 transitions, 125161 flow