./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- 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 19:14:39,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:14:39,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:14:39,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:14:39,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:14:39,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:14:39,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:14:39,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:14:39,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:14:39,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:14:39,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:14:39,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:14:39,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:14:39,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:14:39,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:14:39,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:14:39,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:14:39,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:14:39,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:14:39,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:14:39,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:14:39,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:14:39,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:14:39,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:14:39,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:14:39,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:14:39,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:14:39,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:14:39,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:14:39,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:14:39,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:14:39,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:14:39,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:14:39,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:14:39,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:14:39,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:14:39,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:14:39,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:14:39,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:14:39,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:14:39,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:14:39,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:14:39,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:14:39,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:14:39,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:14:39,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:14:39,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:14:39,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:14:39,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:14:39,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:14:39,544 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:14:39,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:14:39,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:14:39,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:14:39,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:14:39,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:14:39,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:14:39,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:14:39,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:14:39,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:14:39,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:14:39,548 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:14:39,548 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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2022-12-13 19:14:39,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:14:39,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:14:39,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:14:39,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:14:39,730 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:14:39,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 19:14:42,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:14:42,552 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:14:42,552 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 19:14:42,557 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/data/07c5808ca/0be8879f4a0c45c0ae9b26162721b052/FLAG06a79e30c [2022-12-13 19:14:42,568 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/data/07c5808ca/0be8879f4a0c45c0ae9b26162721b052 [2022-12-13 19:14:42,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:14:42,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:14:42,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:14:42,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:14:42,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:14:42,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cd2f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42, skipping insertion in model container [2022-12-13 19:14:42,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:14:42,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:14:42,738 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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 19:14:42,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:14:42,758 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:14:42,780 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_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 19:14:42,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:14:42,797 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:14:42,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42 WrapperNode [2022-12-13 19:14:42,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:14:42,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:14:42,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:14:42,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:14:42,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,837 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 271 [2022-12-13 19:14:42,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:14:42,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:14:42,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:14:42,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:14:42,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,868 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:14:42,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:14:42,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:14:42,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:14:42,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (1/1) ... [2022-12-13 19:14:42,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:14:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:42,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:14:42,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:14:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:14:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:14:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:14:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:14:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:14:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:14:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:14:42,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:14:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:14:42,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:14:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:14:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:14:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:14:42,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:14:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:14:42,946 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 19:14:43,033 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:14:43,035 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:14:43,366 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:14:43,374 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:14:43,374 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 19:14:43,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:14:43 BoogieIcfgContainer [2022-12-13 19:14:43,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:14:43,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:14:43,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:14:43,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:14:43,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:14:42" (1/3) ... [2022-12-13 19:14:43,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4261ce2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:14:43, skipping insertion in model container [2022-12-13 19:14:43,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:14:42" (2/3) ... [2022-12-13 19:14:43,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4261ce2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:14:43, skipping insertion in model container [2022-12-13 19:14:43,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:14:43" (3/3) ... [2022-12-13 19:14:43,383 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2022-12-13 19:14:43,389 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:14:43,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:14:43,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:14:43,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:14:43,480 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:14:43,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 356 transitions, 736 flow [2022-12-13 19:14:43,642 INFO L130 PetriNetUnfolder]: 28/353 cut-off events. [2022-12-13 19:14:43,642 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:14:43,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 353 events. 28/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 568 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 272. Up to 2 conditions per place. [2022-12-13 19:14:43,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 356 transitions, 736 flow [2022-12-13 19:14:43,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 342 transitions, 702 flow [2022-12-13 19:14:43,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:14:43,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 342 transitions, 702 flow [2022-12-13 19:14:43,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 342 transitions, 702 flow [2022-12-13 19:14:43,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 342 transitions, 702 flow [2022-12-13 19:14:43,751 INFO L130 PetriNetUnfolder]: 28/342 cut-off events. [2022-12-13 19:14:43,752 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:14:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 342 events. 28/342 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 568 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 272. Up to 2 conditions per place. [2022-12-13 19:14:43,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 20670 [2022-12-13 19:14:50,801 INFO L134 LiptonReduction]: Checked pairs total: 19042 [2022-12-13 19:14:50,801 INFO L136 LiptonReduction]: Total number of compositions: 394 [2022-12-13 19:14:50,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:14:50,815 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;@59e324a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:14:50,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 19:14:50,820 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2022-12-13 19:14:50,820 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:14:50,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:50,821 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:50,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:50,825 INFO L85 PathProgramCache]: Analyzing trace with hash 958201319, now seen corresponding path program 1 times [2022-12-13 19:14:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638928515] [2022-12-13 19:14:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:51,112 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 19:14:51,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638928515] [2022-12-13 19:14:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638928515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:51,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:51,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:14:51,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554503694] [2022-12-13 19:14:51,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:14:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:14:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:14:51,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 750 [2022-12-13 19:14:51,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:51,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 750 [2022-12-13 19:14:51,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:51,329 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2022-12-13 19:14:51,329 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 19:14:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1528 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2022-12-13 19:14:51,333 INFO L137 encePairwiseOnDemand]: 742/750 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2022-12-13 19:14:51,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2022-12-13 19:14:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:14:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:14:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 982 transitions. [2022-12-13 19:14:51,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43644444444444447 [2022-12-13 19:14:51,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 982 transitions. [2022-12-13 19:14:51,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 982 transitions. [2022-12-13 19:14:51,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:51,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 982 transitions. [2022-12-13 19:14:51,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,366 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 982 transitions. [2022-12-13 19:14:51,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2022-12-13 19:14:51,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:14:51,371 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2022-12-13 19:14:51,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2022-12-13 19:14:51,375 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2022-12-13 19:14:51,375 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2022-12-13 19:14:51,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:51,376 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:14:51,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 344698449, now seen corresponding path program 1 times [2022-12-13 19:14:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:51,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557193733] [2022-12-13 19:14:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:14:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:51,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557193733] [2022-12-13 19:14:51,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557193733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:51,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960943227] [2022-12-13 19:14:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:51,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:51,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:14:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:14:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:14:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:14:51,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:14:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960943227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:51,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:14:51,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 19:14:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145999698] [2022-12-13 19:14:51,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:51,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:14:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:51,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:14:51,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:14:51,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 750 [2022-12-13 19:14:51,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 312.875) internal successors, (2503), 8 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:51,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 750 [2022-12-13 19:14:51,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:51,943 INFO L130 PetriNetUnfolder]: 370/554 cut-off events. [2022-12-13 19:14:51,943 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 19:14:51,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1531 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2022-12-13 19:14:51,947 INFO L137 encePairwiseOnDemand]: 743/750 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2022-12-13 19:14:51,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2022-12-13 19:14:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:14:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:14:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1905 transitions. [2022-12-13 19:14:51,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2022-12-13 19:14:51,957 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1905 transitions. [2022-12-13 19:14:51,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1905 transitions. [2022-12-13 19:14:51,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:51,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1905 transitions. [2022-12-13 19:14:51,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 317.5) internal successors, (1905), 6 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,966 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,966 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 1905 transitions. [2022-12-13 19:14:51,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2022-12-13 19:14:51,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:51,967 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2022-12-13 19:14:51,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2022-12-13 19:14:51,968 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2022-12-13 19:14:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2022-12-13 19:14:51,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 312.875) internal successors, (2503), 8 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:51,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:51,969 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:14:52,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 19:14:52,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1254566903, now seen corresponding path program 2 times [2022-12-13 19:14:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:52,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085428623] [2022-12-13 19:14:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:14:52,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085428623] [2022-12-13 19:14:52,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085428623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342504549] [2022-12-13 19:14:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:14:52,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:52,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:52,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:14:52,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:14:52,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:14:52,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:14:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:14:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 19:14:52,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:14:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342504549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:52,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:14:52,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 19:14:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938250633] [2022-12-13 19:14:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:14:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:14:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:14:52,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 750 [2022-12-13 19:14:52,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 328.25) internal successors, (1313), 4 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:52,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:52,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 750 [2022-12-13 19:14:52,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:52,751 INFO L130 PetriNetUnfolder]: 644/962 cut-off events. [2022-12-13 19:14:52,751 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:14:52,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3412 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2022-12-13 19:14:52,754 INFO L137 encePairwiseOnDemand]: 746/750 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2022-12-13 19:14:52,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2022-12-13 19:14:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:14:52,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:14:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2022-12-13 19:14:52,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4503333333333333 [2022-12-13 19:14:52,757 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2022-12-13 19:14:52,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2022-12-13 19:14:52,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:52,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2022-12-13 19:14:52,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:52,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:52,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:52,764 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 1351 transitions. [2022-12-13 19:14:52,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2022-12-13 19:14:52,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:52,766 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2022-12-13 19:14:52,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2022-12-13 19:14:52,767 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2022-12-13 19:14:52,767 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2022-12-13 19:14:52,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 328.25) internal successors, (1313), 4 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:52,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:52,768 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:52,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:14:52,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:52,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -587536573, now seen corresponding path program 3 times [2022-12-13 19:14:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491999743] [2022-12-13 19:14:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:14:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491999743] [2022-12-13 19:14:53,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491999743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618294692] [2022-12-13 19:14:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:14:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:53,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:14:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:14:53,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 19:14:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:14:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:14:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 19:14:53,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:14:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618294692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:14:53,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 19:14:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492051203] [2022-12-13 19:14:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:14:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:14:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:14:53,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 750 [2022-12-13 19:14:53,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:53,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:53,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 750 [2022-12-13 19:14:53,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:53,499 INFO L130 PetriNetUnfolder]: 758/1124 cut-off events. [2022-12-13 19:14:53,499 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-12-13 19:14:53,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4222 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2022-12-13 19:14:53,503 INFO L137 encePairwiseOnDemand]: 744/750 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2022-12-13 19:14:53,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2022-12-13 19:14:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:14:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:14:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1338 transitions. [2022-12-13 19:14:53,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.446 [2022-12-13 19:14:53,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1338 transitions. [2022-12-13 19:14:53,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1338 transitions. [2022-12-13 19:14:53,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:53,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1338 transitions. [2022-12-13 19:14:53,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:53,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:53,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:53,512 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 1338 transitions. [2022-12-13 19:14:53,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2022-12-13 19:14:53,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:53,513 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2022-12-13 19:14:53,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2022-12-13 19:14:53,514 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2022-12-13 19:14:53,514 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2022-12-13 19:14:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:53,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:53,515 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:53,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:14:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:53,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1198760573, now seen corresponding path program 4 times [2022-12-13 19:14:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:53,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532303739] [2022-12-13 19:14:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:14:53,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532303739] [2022-12-13 19:14:53,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532303739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:53,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064007362] [2022-12-13 19:14:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:14:53,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:53,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:14:53,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:14:54,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:14:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:14:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:14:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:14:54,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:14:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064007362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:14:54,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:14:54,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 19:14:54,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072044270] [2022-12-13 19:14:54,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:14:54,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:14:54,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:14:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:14:54,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 750 [2022-12-13 19:14:54,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 311.7692307692308) internal successors, (4053), 13 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:54,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 750 [2022-12-13 19:14:54,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:54,552 INFO L130 PetriNetUnfolder]: 758/1127 cut-off events. [2022-12-13 19:14:54,552 INFO L131 PetriNetUnfolder]: For 979/979 co-relation queries the response was YES. [2022-12-13 19:14:54,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 979/979 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3883 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2022-12-13 19:14:54,559 INFO L137 encePairwiseOnDemand]: 743/750 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2022-12-13 19:14:54,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2022-12-13 19:14:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:14:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:14:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2211 transitions. [2022-12-13 19:14:54,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42114285714285715 [2022-12-13 19:14:54,565 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2211 transitions. [2022-12-13 19:14:54,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2211 transitions. [2022-12-13 19:14:54,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:54,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2211 transitions. [2022-12-13 19:14:54,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 315.85714285714283) internal successors, (2211), 7 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 750.0) internal successors, (6000), 8 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,578 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 750.0) internal successors, (6000), 8 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,578 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 2211 transitions. [2022-12-13 19:14:54,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2022-12-13 19:14:54,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:54,580 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2022-12-13 19:14:54,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-12-13 19:14:54,581 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2022-12-13 19:14:54,581 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2022-12-13 19:14:54,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 311.7692307692308) internal successors, (4053), 13 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:54,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:54,583 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:54,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:14:54,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:54,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1952952551, now seen corresponding path program 5 times [2022-12-13 19:14:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:54,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298523756] [2022-12-13 19:14:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:14:55,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298523756] [2022-12-13 19:14:55,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298523756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:55,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:55,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:14:55,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775074715] [2022-12-13 19:14:55,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:55,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:14:55,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:14:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:14:55,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 750 [2022-12-13 19:14:55,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 326.25) internal successors, (1305), 4 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:55,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 750 [2022-12-13 19:14:55,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:55,213 INFO L130 PetriNetUnfolder]: 659/978 cut-off events. [2022-12-13 19:14:55,213 INFO L131 PetriNetUnfolder]: For 657/657 co-relation queries the response was YES. [2022-12-13 19:14:55,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 978 events. 659/978 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3458 event pairs, 229 based on Foata normal form. 24/858 useless extension candidates. Maximal degree in co-relation 2402. Up to 582 conditions per place. [2022-12-13 19:14:55,218 INFO L137 encePairwiseOnDemand]: 745/750 looper letters, 68 selfloop transitions, 6 changer transitions 3/77 dead transitions. [2022-12-13 19:14:55,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 501 flow [2022-12-13 19:14:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:14:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:14:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1341 transitions. [2022-12-13 19:14:55,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.447 [2022-12-13 19:14:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1341 transitions. [2022-12-13 19:14:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1341 transitions. [2022-12-13 19:14:55,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:55,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1341 transitions. [2022-12-13 19:14:55,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,235 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 4 states and 1341 transitions. [2022-12-13 19:14:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 501 flow [2022-12-13 19:14:55,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 465 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 19:14:55,239 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 262 flow [2022-12-13 19:14:55,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2022-12-13 19:14:55,240 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2022-12-13 19:14:55,240 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 262 flow [2022-12-13 19:14:55,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 326.25) internal successors, (1305), 4 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:55,242 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:55,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:14:55,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:55,242 INFO L85 PathProgramCache]: Analyzing trace with hash 253173203, now seen corresponding path program 1 times [2022-12-13 19:14:55,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:55,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233328078] [2022-12-13 19:14:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:55,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:14:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233328078] [2022-12-13 19:14:55,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233328078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:55,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:55,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:14:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699945361] [2022-12-13 19:14:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:14:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:14:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:14:55,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 750 [2022-12-13 19:14:55,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 327.75) internal successors, (1311), 4 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:55,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 750 [2022-12-13 19:14:55,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:55,684 INFO L130 PetriNetUnfolder]: 976/1420 cut-off events. [2022-12-13 19:14:55,684 INFO L131 PetriNetUnfolder]: For 1940/1940 co-relation queries the response was YES. [2022-12-13 19:14:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 1420 events. 976/1420 cut-off events. For 1940/1940 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5172 event pairs, 415 based on Foata normal form. 1/1175 useless extension candidates. Maximal degree in co-relation 3870. Up to 944 conditions per place. [2022-12-13 19:14:55,689 INFO L137 encePairwiseOnDemand]: 747/750 looper letters, 67 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2022-12-13 19:14:55,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 501 flow [2022-12-13 19:14:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:14:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:14:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2022-12-13 19:14:55,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2022-12-13 19:14:55,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2022-12-13 19:14:55,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2022-12-13 19:14:55,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:55,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2022-12-13 19:14:55,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,698 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 262 flow. Second operand 3 states and 1010 transitions. [2022-12-13 19:14:55,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 501 flow [2022-12-13 19:14:55,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 477 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 19:14:55,702 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 262 flow [2022-12-13 19:14:55,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2022-12-13 19:14:55,702 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2022-12-13 19:14:55,703 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 262 flow [2022-12-13 19:14:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.75) internal successors, (1311), 4 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:55,703 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:55,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:14:55,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1898631980, now seen corresponding path program 1 times [2022-12-13 19:14:55,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:55,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383699924] [2022-12-13 19:14:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:14:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:55,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383699924] [2022-12-13 19:14:55,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383699924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:55,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:55,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:14:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694610179] [2022-12-13 19:14:55,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:14:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:14:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:14:55,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 750 [2022-12-13 19:14:55,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 324.6) internal successors, (1623), 5 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:55,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:55,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 750 [2022-12-13 19:14:55,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:56,403 INFO L130 PetriNetUnfolder]: 1778/2594 cut-off events. [2022-12-13 19:14:56,403 INFO L131 PetriNetUnfolder]: For 2535/2535 co-relation queries the response was YES. [2022-12-13 19:14:56,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7188 conditions, 2594 events. 1778/2594 cut-off events. For 2535/2535 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11340 event pairs, 675 based on Foata normal form. 20/2402 useless extension candidates. Maximal degree in co-relation 7090. Up to 1445 conditions per place. [2022-12-13 19:14:56,411 INFO L137 encePairwiseOnDemand]: 745/750 looper letters, 83 selfloop transitions, 4 changer transitions 17/104 dead transitions. [2022-12-13 19:14:56,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 104 transitions, 681 flow [2022-12-13 19:14:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:14:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:14:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1668 transitions. [2022-12-13 19:14:56,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4448 [2022-12-13 19:14:56,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1668 transitions. [2022-12-13 19:14:56,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1668 transitions. [2022-12-13 19:14:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1668 transitions. [2022-12-13 19:14:56,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.6) internal successors, (1668), 5 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:56,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:56,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:56,418 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 262 flow. Second operand 5 states and 1668 transitions. [2022-12-13 19:14:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 104 transitions, 681 flow [2022-12-13 19:14:56,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 104 transitions, 675 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:56,421 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 285 flow [2022-12-13 19:14:56,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2022-12-13 19:14:56,422 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2022-12-13 19:14:56,422 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 285 flow [2022-12-13 19:14:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.6) internal successors, (1623), 5 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:56,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:56,422 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:56,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:14:56,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1977273458, now seen corresponding path program 2 times [2022-12-13 19:14:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602044820] [2022-12-13 19:14:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:14:56,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602044820] [2022-12-13 19:14:56,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602044820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797203310] [2022-12-13 19:14:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:14:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:14:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:14:56,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:14:56,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:14:56,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:14:56,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:14:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:14:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:14:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:14:56,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:14:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:14:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797203310] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:14:56,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:14:56,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2022-12-13 19:14:56,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801947464] [2022-12-13 19:14:56,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:14:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:14:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:14:57,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 750 [2022-12-13 19:14:57,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:57,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 750 [2022-12-13 19:14:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:57,448 INFO L130 PetriNetUnfolder]: 1810/2621 cut-off events. [2022-12-13 19:14:57,449 INFO L131 PetriNetUnfolder]: For 3610/3610 co-relation queries the response was YES. [2022-12-13 19:14:57,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8067 conditions, 2621 events. 1810/2621 cut-off events. For 3610/3610 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11034 event pairs, 221 based on Foata normal form. 36/2657 useless extension candidates. Maximal degree in co-relation 7966. Up to 695 conditions per place. [2022-12-13 19:14:57,458 INFO L137 encePairwiseOnDemand]: 742/750 looper letters, 112 selfloop transitions, 17 changer transitions 4/133 dead transitions. [2022-12-13 19:14:57,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 133 transitions, 922 flow [2022-12-13 19:14:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:14:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:14:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2308 transitions. [2022-12-13 19:14:57,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43961904761904763 [2022-12-13 19:14:57,461 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2308 transitions. [2022-12-13 19:14:57,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2308 transitions. [2022-12-13 19:14:57,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:57,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2308 transitions. [2022-12-13 19:14:57,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 329.7142857142857) internal successors, (2308), 7 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 750.0) internal successors, (6000), 8 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,467 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 750.0) internal successors, (6000), 8 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,467 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 285 flow. Second operand 7 states and 2308 transitions. [2022-12-13 19:14:57,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 133 transitions, 922 flow [2022-12-13 19:14:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 133 transitions, 909 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 19:14:57,473 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 385 flow [2022-12-13 19:14:57,473 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2022-12-13 19:14:57,473 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2022-12-13 19:14:57,474 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 385 flow [2022-12-13 19:14:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:57,474 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:57,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:14:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 19:14:57,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1658852932, now seen corresponding path program 3 times [2022-12-13 19:14:57,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:57,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872714582] [2022-12-13 19:14:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:57,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:14:57,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872714582] [2022-12-13 19:14:57,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872714582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:57,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:57,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:14:57,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204233529] [2022-12-13 19:14:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:57,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:14:57,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:14:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:14:57,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 750 [2022-12-13 19:14:57,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 385 flow. Second operand has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:57,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:57,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 750 [2022-12-13 19:14:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:58,398 INFO L130 PetriNetUnfolder]: 2058/2982 cut-off events. [2022-12-13 19:14:58,398 INFO L131 PetriNetUnfolder]: For 5314/5314 co-relation queries the response was YES. [2022-12-13 19:14:58,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 2982 events. 2058/2982 cut-off events. For 5314/5314 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12924 event pairs, 647 based on Foata normal form. 20/3002 useless extension candidates. Maximal degree in co-relation 9966. Up to 1481 conditions per place. [2022-12-13 19:14:58,408 INFO L137 encePairwiseOnDemand]: 745/750 looper letters, 91 selfloop transitions, 12 changer transitions 16/119 dead transitions. [2022-12-13 19:14:58,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 875 flow [2022-12-13 19:14:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:14:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:14:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1663 transitions. [2022-12-13 19:14:58,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4434666666666667 [2022-12-13 19:14:58,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1663 transitions. [2022-12-13 19:14:58,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1663 transitions. [2022-12-13 19:14:58,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:58,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1663 transitions. [2022-12-13 19:14:58,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.6) internal successors, (1663), 5 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:58,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:58,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:58,416 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 385 flow. Second operand 5 states and 1663 transitions. [2022-12-13 19:14:58,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 875 flow [2022-12-13 19:14:58,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 861 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:58,428 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 461 flow [2022-12-13 19:14:58,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2022-12-13 19:14:58,428 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2022-12-13 19:14:58,428 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 461 flow [2022-12-13 19:14:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:58,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:58,429 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 19:14:58,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1209605262, now seen corresponding path program 4 times [2022-12-13 19:14:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453692549] [2022-12-13 19:14:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:58,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:14:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453692549] [2022-12-13 19:14:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453692549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:58,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:58,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:14:58,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171936973] [2022-12-13 19:14:58,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:58,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:14:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:58,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:14:58,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:14:58,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 750 [2022-12-13 19:14:58,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:58,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:58,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 750 [2022-12-13 19:14:58,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:59,175 INFO L130 PetriNetUnfolder]: 1966/2849 cut-off events. [2022-12-13 19:14:59,176 INFO L131 PetriNetUnfolder]: For 7284/7284 co-relation queries the response was YES. [2022-12-13 19:14:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2849 events. 1966/2849 cut-off events. For 7284/7284 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12100 event pairs, 687 based on Foata normal form. 20/2869 useless extension candidates. Maximal degree in co-relation 10216. Up to 1800 conditions per place. [2022-12-13 19:14:59,185 INFO L137 encePairwiseOnDemand]: 745/750 looper letters, 85 selfloop transitions, 13 changer transitions 18/116 dead transitions. [2022-12-13 19:14:59,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 926 flow [2022-12-13 19:14:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:14:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:14:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1660 transitions. [2022-12-13 19:14:59,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2022-12-13 19:14:59,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1660 transitions. [2022-12-13 19:14:59,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1660 transitions. [2022-12-13 19:14:59,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:59,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1660 transitions. [2022-12-13 19:14:59,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 750.0) internal successors, (4500), 6 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,193 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 461 flow. Second operand 5 states and 1660 transitions. [2022-12-13 19:14:59,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 926 flow [2022-12-13 19:14:59,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 910 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 19:14:59,209 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 538 flow [2022-12-13 19:14:59,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2022-12-13 19:14:59,210 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2022-12-13 19:14:59,210 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 538 flow [2022-12-13 19:14:59,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 323.6) internal successors, (1618), 5 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:59,210 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:14:59,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1649461986, now seen corresponding path program 5 times [2022-12-13 19:14:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308652119] [2022-12-13 19:14:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:14:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:14:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:14:59,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:14:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308652119] [2022-12-13 19:14:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308652119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:14:59,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:14:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:14:59,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527559024] [2022-12-13 19:14:59,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:14:59,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:14:59,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:14:59,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:14:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:14:59,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 750 [2022-12-13 19:14:59,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 538 flow. Second operand has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:14:59,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 750 [2022-12-13 19:14:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:14:59,926 INFO L130 PetriNetUnfolder]: 1982/2860 cut-off events. [2022-12-13 19:14:59,927 INFO L131 PetriNetUnfolder]: For 8190/8190 co-relation queries the response was YES. [2022-12-13 19:14:59,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10642 conditions, 2860 events. 1982/2860 cut-off events. For 8190/8190 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12081 event pairs, 595 based on Foata normal form. 36/2896 useless extension candidates. Maximal degree in co-relation 10534. Up to 1481 conditions per place. [2022-12-13 19:14:59,935 INFO L137 encePairwiseOnDemand]: 744/750 looper letters, 111 selfloop transitions, 19 changer transitions 2/132 dead transitions. [2022-12-13 19:14:59,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 132 transitions, 1052 flow [2022-12-13 19:14:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:14:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:14:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1985 transitions. [2022-12-13 19:14:59,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4411111111111111 [2022-12-13 19:14:59,938 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1985 transitions. [2022-12-13 19:14:59,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1985 transitions. [2022-12-13 19:14:59,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:59,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1985 transitions. [2022-12-13 19:14:59,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.8333333333333) internal successors, (1985), 6 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,944 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 538 flow. Second operand 6 states and 1985 transitions. [2022-12-13 19:14:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 132 transitions, 1052 flow [2022-12-13 19:14:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 1034 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:14:59,961 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 605 flow [2022-12-13 19:14:59,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-12-13 19:14:59,962 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2022-12-13 19:14:59,962 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 605 flow [2022-12-13 19:14:59,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:14:59,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:14:59,962 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:14:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:14:59,963 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:14:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:14:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash 492683002, now seen corresponding path program 6 times [2022-12-13 19:14:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:14:59,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882806945] [2022-12-13 19:14:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:14:59,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 19:15:00,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882806945] [2022-12-13 19:15:00,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882806945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:00,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:00,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:15:00,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949596981] [2022-12-13 19:15:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:00,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:15:00,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:15:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:15:00,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 750 [2022-12-13 19:15:00,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 605 flow. Second operand has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:00,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:00,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 750 [2022-12-13 19:15:00,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:00,635 INFO L130 PetriNetUnfolder]: 1978/2850 cut-off events. [2022-12-13 19:15:00,635 INFO L131 PetriNetUnfolder]: For 10136/10136 co-relation queries the response was YES. [2022-12-13 19:15:00,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11385 conditions, 2850 events. 1978/2850 cut-off events. For 10136/10136 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12019 event pairs, 673 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11275. Up to 1666 conditions per place. [2022-12-13 19:15:00,645 INFO L137 encePairwiseOnDemand]: 744/750 looper letters, 108 selfloop transitions, 15 changer transitions 5/128 dead transitions. [2022-12-13 19:15:00,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 1093 flow [2022-12-13 19:15:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:15:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:15:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1980 transitions. [2022-12-13 19:15:00,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-13 19:15:00,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1980 transitions. [2022-12-13 19:15:00,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1980 transitions. [2022-12-13 19:15:00,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:00,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1980 transitions. [2022-12-13 19:15:00,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:00,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:00,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 750.0) internal successors, (5250), 7 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:00,653 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 605 flow. Second operand 6 states and 1980 transitions. [2022-12-13 19:15:00,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 1093 flow [2022-12-13 19:15:00,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 128 transitions, 1074 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:15:00,674 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 620 flow [2022-12-13 19:15:00,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-12-13 19:15:00,675 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2022-12-13 19:15:00,675 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 620 flow [2022-12-13 19:15:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 322.6) internal successors, (1613), 5 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:00,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:00,675 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:00,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:15:00,675 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:15:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash 336405342, now seen corresponding path program 1 times [2022-12-13 19:15:00,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:00,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889054494] [2022-12-13 19:15:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:00,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 19:15:02,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:02,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889054494] [2022-12-13 19:15:02,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889054494] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:02,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581582946] [2022-12-13 19:15:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:02,881 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:02,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:15:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 19:15:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:15:03,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 19:15:03,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:15:03,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:15:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:03,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:06,259 INFO L321 Elim1Store]: treesize reduction 19, result has 84.8 percent of original size [2022-12-13 19:15:06,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 237 [2022-12-13 19:15:06,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:15:06,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 158 [2022-12-13 19:15:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:14,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581582946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:14,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:14,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 12] total 48 [2022-12-13 19:15:14,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758412955] [2022-12-13 19:15:14,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:14,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 19:15:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 19:15:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2222, Unknown=35, NotChecked=0, Total=2450 [2022-12-13 19:15:20,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:15:21,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 750 [2022-12-13 19:15:21,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 620 flow. Second operand has 50 states, 50 states have (on average 221.74) internal successors, (11087), 50 states have internal predecessors, (11087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:21,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:21,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 750 [2022-12-13 19:15:21,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:28,868 INFO L130 PetriNetUnfolder]: 9456/13652 cut-off events. [2022-12-13 19:15:28,868 INFO L131 PetriNetUnfolder]: For 40567/40567 co-relation queries the response was YES. [2022-12-13 19:15:28,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53111 conditions, 13652 events. 9456/13652 cut-off events. For 40567/40567 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 76861 event pairs, 971 based on Foata normal form. 6/13658 useless extension candidates. Maximal degree in co-relation 48167. Up to 2320 conditions per place. [2022-12-13 19:15:28,923 INFO L137 encePairwiseOnDemand]: 734/750 looper letters, 602 selfloop transitions, 309 changer transitions 34/945 dead transitions. [2022-12-13 19:15:28,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 945 transitions, 8415 flow [2022-12-13 19:15:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 19:15:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-13 19:15:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 13602 transitions. [2022-12-13 19:15:28,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30738983050847457 [2022-12-13 19:15:28,939 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 13602 transitions. [2022-12-13 19:15:28,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 13602 transitions. [2022-12-13 19:15:28,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:28,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 13602 transitions. [2022-12-13 19:15:28,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 230.54237288135593) internal successors, (13602), 59 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:28,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 750.0) internal successors, (45000), 60 states have internal predecessors, (45000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:28,983 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 750.0) internal successors, (45000), 60 states have internal predecessors, (45000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:28,983 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 620 flow. Second operand 59 states and 13602 transitions. [2022-12-13 19:15:28,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 945 transitions, 8415 flow [2022-12-13 19:15:29,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 945 transitions, 7586 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-12-13 19:15:29,287 INFO L231 Difference]: Finished difference. Result has 168 places, 415 transitions, 4726 flow [2022-12-13 19:15:29,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=4726, PETRI_PLACES=168, PETRI_TRANSITIONS=415} [2022-12-13 19:15:29,287 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 134 predicate places. [2022-12-13 19:15:29,287 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 415 transitions, 4726 flow [2022-12-13 19:15:29,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 221.74) internal successors, (11087), 50 states have internal predecessors, (11087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:29,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:29,288 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:29,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:15:29,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:15:29,489 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:15:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -989118178, now seen corresponding path program 2 times [2022-12-13 19:15:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495278035] [2022-12-13 19:15:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495278035] [2022-12-13 19:15:30,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495278035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:30,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680528186] [2022-12-13 19:15:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:15:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:30,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:30,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:15:30,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:15:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:15:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:31,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:15:31,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:15:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:31,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:31,571 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:15:31,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:15:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:31,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680528186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:31,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:31,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2022-12-13 19:15:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981770829] [2022-12-13 19:15:31,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 19:15:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 19:15:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-12-13 19:15:34,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 750 [2022-12-13 19:15:34,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 415 transitions, 4726 flow. Second operand has 31 states, 31 states have (on average 288.16129032258067) internal successors, (8933), 31 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:34,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:34,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 750 [2022-12-13 19:15:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:41,225 INFO L130 PetriNetUnfolder]: 17416/25166 cut-off events. [2022-12-13 19:15:41,225 INFO L131 PetriNetUnfolder]: For 284349/284349 co-relation queries the response was YES. [2022-12-13 19:15:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144518 conditions, 25166 events. 17416/25166 cut-off events. For 284349/284349 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 156876 event pairs, 2430 based on Foata normal form. 2/25168 useless extension candidates. Maximal degree in co-relation 140855. Up to 9470 conditions per place. [2022-12-13 19:15:41,409 INFO L137 encePairwiseOnDemand]: 736/750 looper letters, 496 selfloop transitions, 380 changer transitions 11/887 dead transitions. [2022-12-13 19:15:41,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 887 transitions, 11638 flow [2022-12-13 19:15:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:15:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:15:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5946 transitions. [2022-12-13 19:15:41,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3964 [2022-12-13 19:15:41,415 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5946 transitions. [2022-12-13 19:15:41,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5946 transitions. [2022-12-13 19:15:41,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:41,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5946 transitions. [2022-12-13 19:15:41,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 297.3) internal successors, (5946), 20 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:41,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 750.0) internal successors, (15750), 21 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:41,430 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 750.0) internal successors, (15750), 21 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:41,430 INFO L175 Difference]: Start difference. First operand has 168 places, 415 transitions, 4726 flow. Second operand 20 states and 5946 transitions. [2022-12-13 19:15:41,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 887 transitions, 11638 flow [2022-12-13 19:15:43,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 887 transitions, 11371 flow, removed 133 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:43,037 INFO L231 Difference]: Finished difference. Result has 193 places, 607 transitions, 7838 flow [2022-12-13 19:15:43,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7838, PETRI_PLACES=193, PETRI_TRANSITIONS=607} [2022-12-13 19:15:43,037 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 159 predicate places. [2022-12-13 19:15:43,038 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 607 transitions, 7838 flow [2022-12-13 19:15:43,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 288.16129032258067) internal successors, (8933), 31 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:43,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:43,039 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:43,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:15:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:43,241 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:15:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2085689708, now seen corresponding path program 3 times [2022-12-13 19:15:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217762718] [2022-12-13 19:15:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 19:15:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217762718] [2022-12-13 19:15:45,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217762718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:45,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424614113] [2022-12-13 19:15:45,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:15:45,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:45,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:15:45,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 19:15:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:15:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:45,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:15:45,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:15:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:46,654 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:15:46,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:15:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:15:46,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424614113] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:46,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:46,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 43 [2022-12-13 19:15:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703295919] [2022-12-13 19:15:46,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:46,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 19:15:46,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 19:15:46,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 19:15:51,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 750 [2022-12-13 19:15:51,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 607 transitions, 7838 flow. Second operand has 44 states, 44 states have (on average 274.90909090909093) internal successors, (12096), 44 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:51,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:51,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 750 [2022-12-13 19:15:51,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:59,466 INFO L130 PetriNetUnfolder]: 19938/28808 cut-off events. [2022-12-13 19:15:59,466 INFO L131 PetriNetUnfolder]: For 374523/374523 co-relation queries the response was YES. [2022-12-13 19:15:59,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176576 conditions, 28808 events. 19938/28808 cut-off events. For 374523/374523 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 183143 event pairs, 3822 based on Foata normal form. 4/28812 useless extension candidates. Maximal degree in co-relation 171474. Up to 19204 conditions per place. [2022-12-13 19:15:59,709 INFO L137 encePairwiseOnDemand]: 731/750 looper letters, 388 selfloop transitions, 556 changer transitions 223/1167 dead transitions. [2022-12-13 19:15:59,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1167 transitions, 16748 flow [2022-12-13 19:15:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 19:15:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 19:15:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7872 transitions. [2022-12-13 19:15:59,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37485714285714283 [2022-12-13 19:15:59,717 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7872 transitions. [2022-12-13 19:15:59,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7872 transitions. [2022-12-13 19:15:59,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:59,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7872 transitions. [2022-12-13 19:15:59,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 281.14285714285717) internal successors, (7872), 28 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:59,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 750.0) internal successors, (21750), 29 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:59,739 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 750.0) internal successors, (21750), 29 states have internal predecessors, (21750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:15:59,739 INFO L175 Difference]: Start difference. First operand has 193 places, 607 transitions, 7838 flow. Second operand 28 states and 7872 transitions. [2022-12-13 19:15:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1167 transitions, 16748 flow [2022-12-13 19:16:02,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1167 transitions, 16573 flow, removed 82 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:02,341 INFO L231 Difference]: Finished difference. Result has 232 places, 818 transitions, 12458 flow [2022-12-13 19:16:02,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12458, PETRI_PLACES=232, PETRI_TRANSITIONS=818} [2022-12-13 19:16:02,342 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 198 predicate places. [2022-12-13 19:16:02,342 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 818 transitions, 12458 flow [2022-12-13 19:16:02,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 274.90909090909093) internal successors, (12096), 44 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:02,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:02,343 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:02,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:16:02,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:16:02,545 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:16:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1176438818, now seen corresponding path program 4 times [2022-12-13 19:16:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:16:02,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728507370] [2022-12-13 19:16:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:16:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:16:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:16:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728507370] [2022-12-13 19:16:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728507370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:16:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640838] [2022-12-13 19:16:03,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:16:03,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:16:03,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:16:03,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:16:03,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:16:03,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:16:03,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 19:16:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:04,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:16:04,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2022-12-13 19:16:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:16:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:06,636 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:16:06,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:16:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:16:06,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:06,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:16:06,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2022-12-13 19:16:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542703039] [2022-12-13 19:16:06,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 19:16:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:16:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 19:16:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1123, Unknown=1, NotChecked=0, Total=1260 [2022-12-13 19:16:09,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:16:12,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:16:14,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:16:17,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:16:18,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 750 [2022-12-13 19:16:18,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 818 transitions, 12458 flow. Second operand has 36 states, 36 states have (on average 284.22222222222223) internal successors, (10232), 36 states have internal predecessors, (10232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:18,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:18,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 750 [2022-12-13 19:16:18,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:23,771 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 70 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:16:33,086 INFO L130 PetriNetUnfolder]: 17982/26032 cut-off events. [2022-12-13 19:16:33,086 INFO L131 PetriNetUnfolder]: For 519820/519820 co-relation queries the response was YES. [2022-12-13 19:16:33,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202292 conditions, 26032 events. 17982/26032 cut-off events. For 519820/519820 co-relation queries the response was YES. Maximal size of possible extension queue 1182. Compared 163142 event pairs, 3494 based on Foata normal form. 4/26036 useless extension candidates. Maximal degree in co-relation 199985. Up to 9886 conditions per place. [2022-12-13 19:16:33,337 INFO L137 encePairwiseOnDemand]: 735/750 looper letters, 541 selfloop transitions, 558 changer transitions 11/1110 dead transitions. [2022-12-13 19:16:33,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1110 transitions, 18298 flow [2022-12-13 19:16:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 19:16:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 19:16:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5856 transitions. [2022-12-13 19:16:33,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3904 [2022-12-13 19:16:33,342 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5856 transitions. [2022-12-13 19:16:33,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5856 transitions. [2022-12-13 19:16:33,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:33,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5856 transitions. [2022-12-13 19:16:33,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 292.8) internal successors, (5856), 20 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:33,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 750.0) internal successors, (15750), 21 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:33,357 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 750.0) internal successors, (15750), 21 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:33,357 INFO L175 Difference]: Start difference. First operand has 232 places, 818 transitions, 12458 flow. Second operand 20 states and 5856 transitions. [2022-12-13 19:16:33,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1110 transitions, 18298 flow [2022-12-13 19:16:39,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1110 transitions, 17476 flow, removed 249 selfloop flow, removed 11 redundant places. [2022-12-13 19:16:39,053 INFO L231 Difference]: Finished difference. Result has 238 places, 845 transitions, 13433 flow [2022-12-13 19:16:39,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=11726, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13433, PETRI_PLACES=238, PETRI_TRANSITIONS=845} [2022-12-13 19:16:39,054 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 204 predicate places. [2022-12-13 19:16:39,054 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 845 transitions, 13433 flow [2022-12-13 19:16:39,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 284.22222222222223) internal successors, (10232), 36 states have internal predecessors, (10232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:39,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:39,055 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:39,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:16:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:16:39,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:16:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 361067166, now seen corresponding path program 5 times [2022-12-13 19:16:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:16:39,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5604295] [2022-12-13 19:16:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:16:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:42,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:16:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5604295] [2022-12-13 19:16:42,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5604295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:16:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960282438] [2022-12-13 19:16:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:16:42,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:16:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:16:42,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:16:42,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:16:43,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 19:16:43,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:16:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:43,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:16:43,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:16:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:16:43,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:44,451 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:16:44,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:16:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:16:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960282438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:44,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:16:44,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 10] total 49 [2022-12-13 19:16:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719521595] [2022-12-13 19:16:44,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 19:16:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:16:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 19:16:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 19:16:54,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 750 [2022-12-13 19:16:54,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 845 transitions, 13433 flow. Second operand has 50 states, 50 states have (on average 265.78) internal successors, (13289), 50 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:16:54,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:54,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 750 [2022-12-13 19:16:54,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:31,993 INFO L130 PetriNetUnfolder]: 62064/89860 cut-off events. [2022-12-13 19:17:31,994 INFO L131 PetriNetUnfolder]: For 1996825/1996825 co-relation queries the response was YES. [2022-12-13 19:17:32,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721060 conditions, 89860 events. 62064/89860 cut-off events. For 1996825/1996825 co-relation queries the response was YES. Maximal size of possible extension queue 4104. Compared 661603 event pairs, 11403 based on Foata normal form. 6/89866 useless extension candidates. Maximal degree in co-relation 661022. Up to 22264 conditions per place. [2022-12-13 19:17:33,601 INFO L137 encePairwiseOnDemand]: 731/750 looper letters, 1636 selfloop transitions, 2490 changer transitions 48/4174 dead transitions. [2022-12-13 19:17:33,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 4174 transitions, 71550 flow [2022-12-13 19:17:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 19:17:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-13 19:17:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 22684 transitions. [2022-12-13 19:17:33,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3644016064257028 [2022-12-13 19:17:33,629 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 22684 transitions. [2022-12-13 19:17:33,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 22684 transitions. [2022-12-13 19:17:33,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:33,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 22684 transitions. [2022-12-13 19:17:33,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 273.30120481927713) internal successors, (22684), 83 states have internal predecessors, (22684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:33,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 750.0) internal successors, (63000), 84 states have internal predecessors, (63000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:33,689 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 750.0) internal successors, (63000), 84 states have internal predecessors, (63000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:17:33,689 INFO L175 Difference]: Start difference. First operand has 238 places, 845 transitions, 13433 flow. Second operand 83 states and 22684 transitions. [2022-12-13 19:17:33,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 4174 transitions, 71550 flow [2022-12-13 19:18:41,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 4174 transitions, 68183 flow, removed 90 selfloop flow, removed 13 redundant places. [2022-12-13 19:18:41,902 INFO L231 Difference]: Finished difference. Result has 341 places, 2759 transitions, 50771 flow [2022-12-13 19:18:41,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=12610, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=576, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=50771, PETRI_PLACES=341, PETRI_TRANSITIONS=2759} [2022-12-13 19:18:41,903 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 307 predicate places. [2022-12-13 19:18:41,903 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 2759 transitions, 50771 flow [2022-12-13 19:18:41,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 265.78) internal successors, (13289), 50 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:41,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:41,904 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:41,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 19:18:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:18:42,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:18:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1568741182, now seen corresponding path program 6 times [2022-12-13 19:18:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431179238] [2022-12-13 19:18:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 19:18:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431179238] [2022-12-13 19:18:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431179238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554469765] [2022-12-13 19:18:43,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:18:43,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:43,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:18:43,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 19:18:43,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 19:18:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:44,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:18:44,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2022-12-13 19:18:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:18:44,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:45,141 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:18:45,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:18:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:18:45,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554469765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:45,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:18:45,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 41 [2022-12-13 19:18:45,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113363103] [2022-12-13 19:18:45,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 19:18:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:18:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 19:18:45,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 19:18:50,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 750 [2022-12-13 19:18:50,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 2759 transitions, 50771 flow. Second operand has 42 states, 42 states have (on average 269.0952380952381) internal successors, (11302), 42 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:18:50,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:50,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 750 [2022-12-13 19:18:50,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:35,949 INFO L130 PetriNetUnfolder]: 63636/92194 cut-off events. [2022-12-13 19:19:35,949 INFO L131 PetriNetUnfolder]: For 3146318/3146318 co-relation queries the response was YES. [2022-12-13 19:19:37,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836255 conditions, 92194 events. 63636/92194 cut-off events. For 3146318/3146318 co-relation queries the response was YES. Maximal size of possible extension queue 4223. Compared 682115 event pairs, 13266 based on Foata normal form. 12/92206 useless extension candidates. Maximal degree in co-relation 769308. Up to 23008 conditions per place. [2022-12-13 19:19:37,655 INFO L137 encePairwiseOnDemand]: 730/750 looper letters, 1194 selfloop transitions, 2341 changer transitions 20/3555 dead transitions. [2022-12-13 19:19:37,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 3555 transitions, 69102 flow [2022-12-13 19:19:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 19:19:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 19:19:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 11373 transitions. [2022-12-13 19:19:37,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36985365853658536 [2022-12-13 19:19:37,665 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 11373 transitions. [2022-12-13 19:19:37,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 11373 transitions. [2022-12-13 19:19:37,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:37,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 11373 transitions. [2022-12-13 19:19:37,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 277.390243902439) internal successors, (11373), 41 states have internal predecessors, (11373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:37,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 750.0) internal successors, (31500), 42 states have internal predecessors, (31500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:37,694 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 750.0) internal successors, (31500), 42 states have internal predecessors, (31500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:19:37,694 INFO L175 Difference]: Start difference. First operand has 341 places, 2759 transitions, 50771 flow. Second operand 41 states and 11373 transitions. [2022-12-13 19:19:37,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 3555 transitions, 69102 flow [2022-12-13 19:21:44,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 3555 transitions, 68085 flow, removed 290 selfloop flow, removed 15 redundant places. [2022-12-13 19:21:44,828 INFO L231 Difference]: Finished difference. Result has 373 places, 2796 transitions, 55341 flow [2022-12-13 19:21:44,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=49754, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=55341, PETRI_PLACES=373, PETRI_TRANSITIONS=2796} [2022-12-13 19:21:44,830 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 339 predicate places. [2022-12-13 19:21:44,830 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 2796 transitions, 55341 flow [2022-12-13 19:21:44,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 269.0952380952381) internal successors, (11302), 42 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:44,831 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:44,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:21:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:45,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:21:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -979173874, now seen corresponding path program 7 times [2022-12-13 19:21:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891020330] [2022-12-13 19:21:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 19:21:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891020330] [2022-12-13 19:21:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891020330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472607395] [2022-12-13 19:21:46,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:21:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:46,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:46,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:21:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:21:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:46,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:21:46,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:21:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:21:46,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:47,571 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:21:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:21:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:21:47,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472607395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:47,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:47,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 38 [2022-12-13 19:21:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759048221] [2022-12-13 19:21:47,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 19:21:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 19:21:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 19:21:53,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 750 [2022-12-13 19:21:53,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 2796 transitions, 55341 flow. Second operand has 39 states, 39 states have (on average 269.05128205128204) internal successors, (10493), 39 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:53,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:53,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 750 [2022-12-13 19:21:53,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:22:43,442 INFO L130 PetriNetUnfolder]: 64572/93544 cut-off events. [2022-12-13 19:22:43,442 INFO L131 PetriNetUnfolder]: For 3641681/3641681 co-relation queries the response was YES. [2022-12-13 19:22:44,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888754 conditions, 93544 events. 64572/93544 cut-off events. For 3641681/3641681 co-relation queries the response was YES. Maximal size of possible extension queue 4384. Compared 694809 event pairs, 12606 based on Foata normal form. 6/93550 useless extension candidates. Maximal degree in co-relation 831892. Up to 23416 conditions per place. [2022-12-13 19:22:45,373 INFO L137 encePairwiseOnDemand]: 731/750 looper letters, 1109 selfloop transitions, 2508 changer transitions 30/3647 dead transitions. [2022-12-13 19:22:45,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 3647 transitions, 74547 flow [2022-12-13 19:22:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 19:22:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 19:22:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 13029 transitions. [2022-12-13 19:22:45,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36961702127659574 [2022-12-13 19:22:45,384 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 13029 transitions. [2022-12-13 19:22:45,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 13029 transitions. [2022-12-13 19:22:45,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:22:45,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 13029 transitions. [2022-12-13 19:22:45,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 277.21276595744683) internal successors, (13029), 47 states have internal predecessors, (13029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:45,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 750.0) internal successors, (36000), 48 states have internal predecessors, (36000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:45,419 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 750.0) internal successors, (36000), 48 states have internal predecessors, (36000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:22:45,419 INFO L175 Difference]: Start difference. First operand has 373 places, 2796 transitions, 55341 flow. Second operand 47 states and 13029 transitions. [2022-12-13 19:22:45,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 3647 transitions, 74547 flow [2022-12-13 19:25:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 3647 transitions, 72951 flow, removed 168 selfloop flow, removed 19 redundant places. [2022-12-13 19:25:18,232 INFO L231 Difference]: Finished difference. Result has 404 places, 2822 transitions, 59399 flow [2022-12-13 19:25:18,233 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=53757, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=59399, PETRI_PLACES=404, PETRI_TRANSITIONS=2822} [2022-12-13 19:25:18,233 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 370 predicate places. [2022-12-13 19:25:18,234 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 2822 transitions, 59399 flow [2022-12-13 19:25:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 269.05128205128204) internal successors, (10493), 39 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:25:18,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:25:18,235 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:25:18,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:25:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:25:18,436 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 19:25:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:25:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1381398750, now seen corresponding path program 8 times [2022-12-13 19:25:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:25:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466073442] [2022-12-13 19:25:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:25:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:25:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:25:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:25:19,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:25:19,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466073442] [2022-12-13 19:25:19,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466073442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:25:19,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229953942] [2022-12-13 19:25:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:25:19,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:25:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:25:19,249 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:25:19,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4cba50-c2e0-4445-a95c-9e60ad791b4d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:25:19,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:25:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:25:19,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:25:19,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:25:19,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:25:19,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-13 19:25:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:25:19,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:25:20,181 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-13 19:25:20,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-13 19:25:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 19:25:20,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229953942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:25:20,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:25:20,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2022-12-13 19:25:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331332238] [2022-12-13 19:25:20,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:25:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:25:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:25:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:25:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:25:23,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 750 [2022-12-13 19:25:23,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 2822 transitions, 59399 flow. Second operand has 29 states, 29 states have (on average 288.2413793103448) internal successors, (8359), 29 states have internal predecessors, (8359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:25:23,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:25:23,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 750 [2022-12-13 19:25:23,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:26:12,923 INFO L130 PetriNetUnfolder]: 70650/102364 cut-off events. [2022-12-13 19:26:12,923 INFO L131 PetriNetUnfolder]: For 4778112/4778112 co-relation queries the response was YES. [2022-12-13 19:26:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027253 conditions, 102364 events. 70650/102364 cut-off events. For 4778112/4778112 co-relation queries the response was YES. Maximal size of possible extension queue 4888. Compared 768987 event pairs, 13988 based on Foata normal form. 6/102370 useless extension candidates. Maximal degree in co-relation 956267. Up to 32208 conditions per place. [2022-12-13 19:26:15,081 INFO L137 encePairwiseOnDemand]: 736/750 looper letters, 638 selfloop transitions, 2569 changer transitions 12/3219 dead transitions. [2022-12-13 19:26:15,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 3219 transitions, 72535 flow [2022-12-13 19:26:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:26:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:26:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 6527 transitions. [2022-12-13 19:26:15,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3955757575757576 [2022-12-13 19:26:15,087 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 6527 transitions. [2022-12-13 19:26:15,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 6527 transitions. [2022-12-13 19:26:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:26:15,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 6527 transitions. [2022-12-13 19:26:15,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 296.6818181818182) internal successors, (6527), 22 states have internal predecessors, (6527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:15,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 750.0) internal successors, (17250), 23 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:15,104 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 750.0) internal successors, (17250), 23 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:15,104 INFO L175 Difference]: Start difference. First operand has 404 places, 2822 transitions, 59399 flow. Second operand 22 states and 6527 transitions. [2022-12-13 19:26:15,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 3219 transitions, 72535 flow