./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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-8393723 [2022-11-18 19:39:51,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:39:51,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:39:51,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:39:51,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:39:51,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:39:51,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:39:51,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:39:51,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:39:51,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:39:51,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:39:51,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:39:51,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:39:51,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:39:51,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:39:51,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:39:51,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:39:51,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:39:51,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:39:51,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:39:51,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:39:51,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:39:51,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:39:51,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:39:51,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:39:51,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:39:51,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:39:51,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:39:51,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:39:51,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:39:51,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:39:51,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:39:51,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:39:51,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:39:51,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:39:51,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:39:51,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:39:51,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:39:51,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:39:51,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:39:51,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:39:51,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:39:51,449 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:39:51,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:39:51,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:39:51,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:39:51,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:39:51,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:39:51,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:39:51,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:39:51,456 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:39:51,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:39:51,458 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:39:51,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:39:51,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:39:51,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:39:51,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:39:51,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:39:51,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:39:51,459 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:39:51,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:39:51,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:39:51,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:39:51,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:39:51,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:39:51,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:39:51,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:39:51,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:39:51,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:39:51,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:39:51,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:39:51,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:39:51,462 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:39:51,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:39:51,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:39:51,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-18 19:39:51,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:39:51,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:39:51,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:39:51,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:39:51,842 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:39:51,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-18 19:39:51,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/data/2c151f3a7/af8323a80837420b9cb569a5d50374ec/FLAGa5f3718b6 [2022-11-18 19:39:52,640 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:39:52,641 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-18 19:39:52,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/data/2c151f3a7/af8323a80837420b9cb569a5d50374ec/FLAGa5f3718b6 [2022-11-18 19:39:52,938 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/data/2c151f3a7/af8323a80837420b9cb569a5d50374ec [2022-11-18 19:39:52,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:39:52,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:39:52,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:39:52,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:39:52,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:39:52,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:39:52" (1/1) ... [2022-11-18 19:39:52,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655a9bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:52, skipping insertion in model container [2022-11-18 19:39:52,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:39:52" (1/1) ... [2022-11-18 19:39:52,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:39:53,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:39:53,245 WARN L234 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_57420855-4fc1-4b8a-b1c1-1e17ff30401d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-18 19:39:53,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:39:53,267 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:39:53,312 WARN L234 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_57420855-4fc1-4b8a-b1c1-1e17ff30401d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-18 19:39:53,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:39:53,353 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:39:53,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53 WrapperNode [2022-11-18 19:39:53,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:39:53,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:39:53,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:39:53,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:39:53,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,424 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-11-18 19:39:53,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:39:53,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:39:53,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:39:53,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:39:53,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,480 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:39:53,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:39:53,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:39:53,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:39:53,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (1/1) ... [2022-11-18 19:39:53,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:39:53,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:39:53,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:39:53,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:39:53,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:39:53,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:39:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:39:53,603 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:39:53,604 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:39:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:39:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:39:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:39:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:39:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:39:53,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:39:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:39:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:39:53,607 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:39:53,757 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:39:53,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:39:54,116 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:39:54,145 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:39:54,146 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 19:39:54,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:39:54 BoogieIcfgContainer [2022-11-18 19:39:54,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:39:54,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:39:54,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:39:54,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:39:54,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:39:52" (1/3) ... [2022-11-18 19:39:54,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c01768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:39:54, skipping insertion in model container [2022-11-18 19:39:54,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:39:53" (2/3) ... [2022-11-18 19:39:54,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c01768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:39:54, skipping insertion in model container [2022-11-18 19:39:54,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:39:54" (3/3) ... [2022-11-18 19:39:54,163 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-18 19:39:54,174 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:39:54,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:39:54,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:39:54,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:39:54,342 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:39:54,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 226 transitions, 468 flow [2022-11-18 19:39:54,568 INFO L130 PetriNetUnfolder]: 21/224 cut-off events. [2022-11-18 19:39:54,569 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:39:54,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 21/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 226 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2022-11-18 19:39:54,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 226 transitions, 468 flow [2022-11-18 19:39:54,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 442 flow [2022-11-18 19:39:54,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:39:54,607 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;@596bce76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:39:54,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 19:39:54,681 INFO L130 PetriNetUnfolder]: 21/214 cut-off events. [2022-11-18 19:39:54,682 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:39:54,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:54,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:54,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1417987346, now seen corresponding path program 1 times [2022-11-18 19:39:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:54,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203867926] [2022-11-18 19:39:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:55,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203867926] [2022-11-18 19:39:55,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203867926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:55,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:55,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:39:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141767479] [2022-11-18 19:39:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:55,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:39:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:55,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:39:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:39:55,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 226 [2022-11-18 19:39:55,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 215 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:55,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:55,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 226 [2022-11-18 19:39:55,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:55,306 INFO L130 PetriNetUnfolder]: 10/204 cut-off events. [2022-11-18 19:39:55,307 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 19:39:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 204 events. 10/204 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 213 event pairs, 0 based on Foata normal form. 13/200 useless extension candidates. Maximal degree in co-relation 147. Up to 5 conditions per place. [2022-11-18 19:39:55,310 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 4 selfloop transitions, 0 changer transitions 7/204 dead transitions. [2022-11-18 19:39:55,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 204 transitions, 428 flow [2022-11-18 19:39:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:39:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:39:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 435 transitions. [2022-11-18 19:39:55,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9623893805309734 [2022-11-18 19:39:55,329 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 435 transitions. [2022-11-18 19:39:55,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 435 transitions. [2022-11-18 19:39:55,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:55,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 435 transitions. [2022-11-18 19:39:55,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:55,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:55,347 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:55,349 INFO L175 Difference]: Start difference. First operand has 201 places, 215 transitions, 442 flow. Second operand 2 states and 435 transitions. [2022-11-18 19:39:55,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 204 transitions, 428 flow [2022-11-18 19:39:55,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 204 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:39:55,361 INFO L231 Difference]: Finished difference. Result has 198 places, 197 transitions, 398 flow [2022-11-18 19:39:55,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=398, PETRI_PLACES=198, PETRI_TRANSITIONS=197} [2022-11-18 19:39:55,367 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -3 predicate places. [2022-11-18 19:39:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 197 transitions, 398 flow [2022-11-18 19:39:55,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:55,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:55,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:39:55,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:55,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1078797198, now seen corresponding path program 1 times [2022-11-18 19:39:55,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:55,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360162878] [2022-11-18 19:39:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360162878] [2022-11-18 19:39:56,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360162878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:56,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:56,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 19:39:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558947770] [2022-11-18 19:39:56,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:56,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-18 19:39:56,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 197 transitions, 398 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:56,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:56,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-18 19:39:56,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:57,220 INFO L130 PetriNetUnfolder]: 53/455 cut-off events. [2022-11-18 19:39:57,220 INFO L131 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-11-18 19:39:57,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 455 events. 53/455 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1860 event pairs, 17 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 617. Up to 72 conditions per place. [2022-11-18 19:39:57,225 INFO L137 encePairwiseOnDemand]: 214/226 looper letters, 82 selfloop transitions, 3 changer transitions 11/245 dead transitions. [2022-11-18 19:39:57,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 245 transitions, 693 flow [2022-11-18 19:39:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:39:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:39:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1690 transitions. [2022-11-18 19:39:57,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7477876106194691 [2022-11-18 19:39:57,237 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1690 transitions. [2022-11-18 19:39:57,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1690 transitions. [2022-11-18 19:39:57,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:57,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1690 transitions. [2022-11-18 19:39:57,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:57,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:57,252 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:57,252 INFO L175 Difference]: Start difference. First operand has 198 places, 197 transitions, 398 flow. Second operand 10 states and 1690 transitions. [2022-11-18 19:39:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 245 transitions, 693 flow [2022-11-18 19:39:57,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 245 transitions, 693 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:39:57,259 INFO L231 Difference]: Finished difference. Result has 209 places, 199 transitions, 438 flow [2022-11-18 19:39:57,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=209, PETRI_TRANSITIONS=199} [2022-11-18 19:39:57,260 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 8 predicate places. [2022-11-18 19:39:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 199 transitions, 438 flow [2022-11-18 19:39:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:57,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:57,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:57,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:39:57,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash -140729638, now seen corresponding path program 2 times [2022-11-18 19:39:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:57,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143264170] [2022-11-18 19:39:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:58,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143264170] [2022-11-18 19:39:58,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143264170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:58,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:58,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 19:39:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578321514] [2022-11-18 19:39:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:58,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-18 19:39:58,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 199 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:58,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-18 19:39:58,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:58,735 INFO L130 PetriNetUnfolder]: 52/450 cut-off events. [2022-11-18 19:39:58,736 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-11-18 19:39:58,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 450 events. 52/450 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1816 event pairs, 14 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 691. Up to 72 conditions per place. [2022-11-18 19:39:58,740 INFO L137 encePairwiseOnDemand]: 216/226 looper letters, 79 selfloop transitions, 3 changer transitions 15/246 dead transitions. [2022-11-18 19:39:58,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 246 transitions, 774 flow [2022-11-18 19:39:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:39:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:39:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1688 transitions. [2022-11-18 19:39:58,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7469026548672566 [2022-11-18 19:39:58,746 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1688 transitions. [2022-11-18 19:39:58,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1688 transitions. [2022-11-18 19:39:58,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:58,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1688 transitions. [2022-11-18 19:39:58,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.8) internal successors, (1688), 10 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,759 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,759 INFO L175 Difference]: Start difference. First operand has 209 places, 199 transitions, 438 flow. Second operand 10 states and 1688 transitions. [2022-11-18 19:39:58,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 246 transitions, 774 flow [2022-11-18 19:39:58,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 724 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-11-18 19:39:58,767 INFO L231 Difference]: Finished difference. Result has 212 places, 197 transitions, 436 flow [2022-11-18 19:39:58,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=212, PETRI_TRANSITIONS=197} [2022-11-18 19:39:58,768 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 11 predicate places. [2022-11-18 19:39:58,769 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 197 transitions, 436 flow [2022-11-18 19:39:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:58,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:58,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:39:58,771 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash 372018136, now seen corresponding path program 1 times [2022-11-18 19:39:58,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:58,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460795759] [2022-11-18 19:39:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:58,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:58,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460795759] [2022-11-18 19:39:58,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460795759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:58,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:58,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:39:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810560496] [2022-11-18 19:39:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:58,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:39:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:39:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:39:58,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 226 [2022-11-18 19:39:58,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 197 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 226 [2022-11-18 19:39:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:58,960 INFO L130 PetriNetUnfolder]: 19/270 cut-off events. [2022-11-18 19:39:58,960 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-18 19:39:58,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 270 events. 19/270 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 557 event pairs, 3 based on Foata normal form. 3/256 useless extension candidates. Maximal degree in co-relation 328. Up to 16 conditions per place. [2022-11-18 19:39:58,963 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 11 selfloop transitions, 2 changer transitions 5/201 dead transitions. [2022-11-18 19:39:58,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 201 transitions, 488 flow [2022-11-18 19:39:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:39:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:39:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-11-18 19:39:58,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9144542772861357 [2022-11-18 19:39:58,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-11-18 19:39:58,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-11-18 19:39:58,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:58,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-11-18 19:39:58,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:58,977 INFO L175 Difference]: Start difference. First operand has 212 places, 197 transitions, 436 flow. Second operand 3 states and 620 transitions. [2022-11-18 19:39:58,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 201 transitions, 488 flow [2022-11-18 19:39:58,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 201 transitions, 466 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-11-18 19:39:58,984 INFO L231 Difference]: Finished difference. Result has 200 places, 195 transitions, 416 flow [2022-11-18 19:39:58,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2022-11-18 19:39:58,991 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2022-11-18 19:39:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 416 flow [2022-11-18 19:39:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:59,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:59,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:39:59,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -462119142, now seen corresponding path program 1 times [2022-11-18 19:39:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213065462] [2022-11-18 19:39:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213065462] [2022-11-18 19:39:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213065462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:59,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:59,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:39:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703637987] [2022-11-18 19:39:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:39:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:39:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:39:59,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-18 19:39:59,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:59,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-18 19:39:59,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:59,256 INFO L130 PetriNetUnfolder]: 18/284 cut-off events. [2022-11-18 19:39:59,257 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 19:39:59,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 284 events. 18/284 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 627 event pairs, 3 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 328. Up to 14 conditions per place. [2022-11-18 19:39:59,260 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 10 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2022-11-18 19:39:59,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 199 transitions, 451 flow [2022-11-18 19:39:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:39:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:39:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-18 19:39:59,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9306784660766961 [2022-11-18 19:39:59,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-18 19:39:59,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-18 19:39:59,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:59,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-18 19:39:59,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,269 INFO L175 Difference]: Start difference. First operand has 200 places, 195 transitions, 416 flow. Second operand 3 states and 631 transitions. [2022-11-18 19:39:59,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 199 transitions, 451 flow [2022-11-18 19:39:59,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 199 transitions, 439 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-18 19:39:59,274 INFO L231 Difference]: Finished difference. Result has 196 places, 195 transitions, 412 flow [2022-11-18 19:39:59,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=196, PETRI_TRANSITIONS=195} [2022-11-18 19:39:59,278 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -5 predicate places. [2022-11-18 19:39:59,278 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 195 transitions, 412 flow [2022-11-18 19:39:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:59,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:59,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:39:59,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash -790842312, now seen corresponding path program 1 times [2022-11-18 19:39:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648308540] [2022-11-18 19:39:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:39:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648308540] [2022-11-18 19:39:59,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648308540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:39:59,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:39:59,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:39:59,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644044741] [2022-11-18 19:39:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:39:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:39:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:39:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:39:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:39:59,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-18 19:39:59,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 195 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:39:59,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-18 19:39:59,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:39:59,539 INFO L130 PetriNetUnfolder]: 21/333 cut-off events. [2022-11-18 19:39:59,540 INFO L131 PetriNetUnfolder]: For 17/18 co-relation queries the response was YES. [2022-11-18 19:39:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 333 events. 21/333 cut-off events. For 17/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 839 event pairs, 2 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 382. Up to 25 conditions per place. [2022-11-18 19:39:59,542 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 9 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2022-11-18 19:39:59,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 198 transitions, 442 flow [2022-11-18 19:39:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:39:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:39:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2022-11-18 19:39:59,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9292035398230089 [2022-11-18 19:39:59,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2022-11-18 19:39:59,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2022-11-18 19:39:59,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:39:59,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2022-11-18 19:39:59,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,552 INFO L175 Difference]: Start difference. First operand has 196 places, 195 transitions, 412 flow. Second operand 3 states and 630 transitions. [2022-11-18 19:39:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 198 transitions, 442 flow [2022-11-18 19:39:59,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 198 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 19:39:59,558 INFO L231 Difference]: Finished difference. Result has 197 places, 195 transitions, 416 flow [2022-11-18 19:39:59,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=197, PETRI_TRANSITIONS=195} [2022-11-18 19:39:59,562 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -4 predicate places. [2022-11-18 19:39:59,562 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 195 transitions, 416 flow [2022-11-18 19:39:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:59,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:39:59,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:59,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:39:59,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:39:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash 41150500, now seen corresponding path program 1 times [2022-11-18 19:39:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:39:59,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507509373] [2022-11-18 19:39:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:39:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:00,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:00,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507509373] [2022-11-18 19:40:00,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507509373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:00,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:00,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 19:40:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195428] [2022-11-18 19:40:00,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:40:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:40:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:40:00,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-18 19:40:00,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 195 transitions, 416 flow. Second operand has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:00,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:00,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-18 19:40:00,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:02,985 INFO L130 PetriNetUnfolder]: 177/1573 cut-off events. [2022-11-18 19:40:02,985 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-18 19:40:02,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 1573 events. 177/1573 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 11202 event pairs, 40 based on Foata normal form. 4/1468 useless extension candidates. Maximal degree in co-relation 2315. Up to 128 conditions per place. [2022-11-18 19:40:02,996 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 152 selfloop transitions, 37 changer transitions 13/331 dead transitions. [2022-11-18 19:40:02,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 331 transitions, 1108 flow [2022-11-18 19:40:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:40:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 19:40:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4095 transitions. [2022-11-18 19:40:03,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471238938053098 [2022-11-18 19:40:03,006 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4095 transitions. [2022-11-18 19:40:03,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4095 transitions. [2022-11-18 19:40:03,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:03,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4095 transitions. [2022-11-18 19:40:03,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 146.25) internal successors, (4095), 28 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:03,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:03,034 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:03,034 INFO L175 Difference]: Start difference. First operand has 197 places, 195 transitions, 416 flow. Second operand 28 states and 4095 transitions. [2022-11-18 19:40:03,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 331 transitions, 1108 flow [2022-11-18 19:40:03,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 331 transitions, 1104 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 19:40:03,042 INFO L231 Difference]: Finished difference. Result has 235 places, 220 transitions, 621 flow [2022-11-18 19:40:03,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=621, PETRI_PLACES=235, PETRI_TRANSITIONS=220} [2022-11-18 19:40:03,043 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 34 predicate places. [2022-11-18 19:40:03,044 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 220 transitions, 621 flow [2022-11-18 19:40:03,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:03,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:03,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:03,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:40:03,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1740695496, now seen corresponding path program 1 times [2022-11-18 19:40:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770504203] [2022-11-18 19:40:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770504203] [2022-11-18 19:40:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770504203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976571337] [2022-11-18 19:40:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:03,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:40:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:40:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:04,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:04,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976571337] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:04,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:04,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-18 19:40:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302937527] [2022-11-18 19:40:04,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:40:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:40:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:40:04,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-18 19:40:04,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 220 transitions, 621 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:04,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:04,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-18 19:40:04,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:06,009 INFO L130 PetriNetUnfolder]: 181/1718 cut-off events. [2022-11-18 19:40:06,010 INFO L131 PetriNetUnfolder]: For 651/667 co-relation queries the response was YES. [2022-11-18 19:40:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2954 conditions, 1718 events. 181/1718 cut-off events. For 651/667 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12882 event pairs, 83 based on Foata normal form. 6/1600 useless extension candidates. Maximal degree in co-relation 2933. Up to 224 conditions per place. [2022-11-18 19:40:06,020 INFO L137 encePairwiseOnDemand]: 206/226 looper letters, 145 selfloop transitions, 22 changer transitions 7/303 dead transitions. [2022-11-18 19:40:06,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 303 transitions, 1218 flow [2022-11-18 19:40:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:40:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 19:40:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2941 transitions. [2022-11-18 19:40:06,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6506637168141592 [2022-11-18 19:40:06,029 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2941 transitions. [2022-11-18 19:40:06,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2941 transitions. [2022-11-18 19:40:06,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:06,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2941 transitions. [2022-11-18 19:40:06,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 147.05) internal successors, (2941), 20 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:06,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:06,056 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:06,056 INFO L175 Difference]: Start difference. First operand has 235 places, 220 transitions, 621 flow. Second operand 20 states and 2941 transitions. [2022-11-18 19:40:06,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 303 transitions, 1218 flow [2022-11-18 19:40:06,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 303 transitions, 1186 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-18 19:40:06,075 INFO L231 Difference]: Finished difference. Result has 250 places, 226 transitions, 705 flow [2022-11-18 19:40:06,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=705, PETRI_PLACES=250, PETRI_TRANSITIONS=226} [2022-11-18 19:40:06,078 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 49 predicate places. [2022-11-18 19:40:06,078 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 226 transitions, 705 flow [2022-11-18 19:40:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:06,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:06,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:06,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:06,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1200571892, now seen corresponding path program 2 times [2022-11-18 19:40:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:06,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17450747] [2022-11-18 19:40:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:06,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17450747] [2022-11-18 19:40:06,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17450747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037334311] [2022-11-18 19:40:06,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:40:06,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:06,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:06,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:40:06,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:40:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:40:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:07,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:40:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037334311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:40:07,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-11-18 19:40:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513752310] [2022-11-18 19:40:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:07,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:40:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:40:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:40:07,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 226 [2022-11-18 19:40:07,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 226 transitions, 705 flow. Second operand has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:07,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:07,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 226 [2022-11-18 19:40:07,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:08,369 INFO L130 PetriNetUnfolder]: 167/1921 cut-off events. [2022-11-18 19:40:08,369 INFO L131 PetriNetUnfolder]: For 953/987 co-relation queries the response was YES. [2022-11-18 19:40:08,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3424 conditions, 1921 events. 167/1921 cut-off events. For 953/987 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 15112 event pairs, 74 based on Foata normal form. 16/1822 useless extension candidates. Maximal degree in co-relation 3397. Up to 374 conditions per place. [2022-11-18 19:40:08,384 INFO L137 encePairwiseOnDemand]: 213/226 looper letters, 81 selfloop transitions, 4 changer transitions 17/261 dead transitions. [2022-11-18 19:40:08,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 261 transitions, 1029 flow [2022-11-18 19:40:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:40:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 19:40:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2278 transitions. [2022-11-18 19:40:08,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7199747155499368 [2022-11-18 19:40:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2278 transitions. [2022-11-18 19:40:08,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2278 transitions. [2022-11-18 19:40:08,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:08,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2278 transitions. [2022-11-18 19:40:08,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.71428571428572) internal successors, (2278), 14 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:08,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:08,405 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:08,406 INFO L175 Difference]: Start difference. First operand has 250 places, 226 transitions, 705 flow. Second operand 14 states and 2278 transitions. [2022-11-18 19:40:08,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 261 transitions, 1029 flow [2022-11-18 19:40:08,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 261 transitions, 980 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-11-18 19:40:08,417 INFO L231 Difference]: Finished difference. Result has 261 places, 226 transitions, 710 flow [2022-11-18 19:40:08,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=710, PETRI_PLACES=261, PETRI_TRANSITIONS=226} [2022-11-18 19:40:08,418 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 60 predicate places. [2022-11-18 19:40:08,418 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 226 transitions, 710 flow [2022-11-18 19:40:08,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:08,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:08,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:08,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 19:40:08,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash 624080989, now seen corresponding path program 1 times [2022-11-18 19:40:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312853889] [2022-11-18 19:40:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:08,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:09,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312853889] [2022-11-18 19:40:09,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312853889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:09,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459645262] [2022-11-18 19:40:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:09,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:09,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:09,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:40:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:09,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:40:09,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:09,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:10,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459645262] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:10,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:10,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-18 19:40:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703586542] [2022-11-18 19:40:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:40:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:40:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:40:10,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-18 19:40:10,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 226 transitions, 710 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:10,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:10,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-18 19:40:10,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:11,739 INFO L130 PetriNetUnfolder]: 224/2278 cut-off events. [2022-11-18 19:40:11,739 INFO L131 PetriNetUnfolder]: For 1897/1926 co-relation queries the response was YES. [2022-11-18 19:40:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4279 conditions, 2278 events. 224/2278 cut-off events. For 1897/1926 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 18720 event pairs, 122 based on Foata normal form. 6/2120 useless extension candidates. Maximal degree in co-relation 4242. Up to 392 conditions per place. [2022-11-18 19:40:11,762 INFO L137 encePairwiseOnDemand]: 209/226 looper letters, 152 selfloop transitions, 23 changer transitions 11/315 dead transitions. [2022-11-18 19:40:11,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 315 transitions, 1452 flow [2022-11-18 19:40:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:40:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:40:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2667 transitions. [2022-11-18 19:40:11,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6556047197640118 [2022-11-18 19:40:11,771 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2667 transitions. [2022-11-18 19:40:11,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2667 transitions. [2022-11-18 19:40:11,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:11,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2667 transitions. [2022-11-18 19:40:11,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.16666666666666) internal successors, (2667), 18 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:11,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:11,789 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:11,790 INFO L175 Difference]: Start difference. First operand has 261 places, 226 transitions, 710 flow. Second operand 18 states and 2667 transitions. [2022-11-18 19:40:11,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 315 transitions, 1452 flow [2022-11-18 19:40:11,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 315 transitions, 1344 flow, removed 50 selfloop flow, removed 12 redundant places. [2022-11-18 19:40:11,808 INFO L231 Difference]: Finished difference. Result has 262 places, 230 transitions, 787 flow [2022-11-18 19:40:11,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=787, PETRI_PLACES=262, PETRI_TRANSITIONS=230} [2022-11-18 19:40:11,811 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 61 predicate places. [2022-11-18 19:40:11,811 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 230 transitions, 787 flow [2022-11-18 19:40:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:11,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:11,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:12,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1210597440, now seen corresponding path program 1 times [2022-11-18 19:40:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912128951] [2022-11-18 19:40:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:12,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912128951] [2022-11-18 19:40:12,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912128951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:12,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:12,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:40:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551049821] [2022-11-18 19:40:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:12,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:40:12,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:40:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:40:12,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-18 19:40:12,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 230 transitions, 787 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:12,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-18 19:40:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:12,636 INFO L130 PetriNetUnfolder]: 293/1774 cut-off events. [2022-11-18 19:40:12,636 INFO L131 PetriNetUnfolder]: For 2056/2124 co-relation queries the response was YES. [2022-11-18 19:40:12,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3284 conditions, 1774 events. 293/1774 cut-off events. For 2056/2124 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 12589 event pairs, 145 based on Foata normal form. 1/1584 useless extension candidates. Maximal degree in co-relation 3251. Up to 431 conditions per place. [2022-11-18 19:40:12,655 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 68 selfloop transitions, 12 changer transitions 11/250 dead transitions. [2022-11-18 19:40:12,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 250 transitions, 1062 flow [2022-11-18 19:40:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:40:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:40:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1785 transitions. [2022-11-18 19:40:12,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-18 19:40:12,659 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1785 transitions. [2022-11-18 19:40:12,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1785 transitions. [2022-11-18 19:40:12,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:12,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1785 transitions. [2022-11-18 19:40:12,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.5) internal successors, (1785), 10 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,671 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,671 INFO L175 Difference]: Start difference. First operand has 262 places, 230 transitions, 787 flow. Second operand 10 states and 1785 transitions. [2022-11-18 19:40:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 250 transitions, 1062 flow [2022-11-18 19:40:12,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 250 transitions, 1023 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-18 19:40:12,687 INFO L231 Difference]: Finished difference. Result has 260 places, 224 transitions, 729 flow [2022-11-18 19:40:12,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=729, PETRI_PLACES=260, PETRI_TRANSITIONS=224} [2022-11-18 19:40:12,689 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 59 predicate places. [2022-11-18 19:40:12,689 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 224 transitions, 729 flow [2022-11-18 19:40:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:12,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:40:12,690 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 867159244, now seen corresponding path program 1 times [2022-11-18 19:40:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916314745] [2022-11-18 19:40:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:12,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:12,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916314745] [2022-11-18 19:40:12,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916314745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:12,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:12,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:40:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520891718] [2022-11-18 19:40:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:40:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:40:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:40:12,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-18 19:40:12,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 224 transitions, 729 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:12,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:12,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-18 19:40:12,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:13,289 INFO L130 PetriNetUnfolder]: 170/1281 cut-off events. [2022-11-18 19:40:13,289 INFO L131 PetriNetUnfolder]: For 1453/1484 co-relation queries the response was YES. [2022-11-18 19:40:13,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1281 events. 170/1281 cut-off events. For 1453/1484 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8171 event pairs, 126 based on Foata normal form. 1/1202 useless extension candidates. Maximal degree in co-relation 2408. Up to 321 conditions per place. [2022-11-18 19:40:13,301 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 45 selfloop transitions, 8 changer transitions 33/240 dead transitions. [2022-11-18 19:40:13,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 240 transitions, 964 flow [2022-11-18 19:40:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:40:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:40:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1783 transitions. [2022-11-18 19:40:13,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7889380530973451 [2022-11-18 19:40:13,306 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1783 transitions. [2022-11-18 19:40:13,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1783 transitions. [2022-11-18 19:40:13,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:13,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1783 transitions. [2022-11-18 19:40:13,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.3) internal successors, (1783), 10 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:13,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:13,318 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:13,318 INFO L175 Difference]: Start difference. First operand has 260 places, 224 transitions, 729 flow. Second operand 10 states and 1783 transitions. [2022-11-18 19:40:13,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 240 transitions, 964 flow [2022-11-18 19:40:13,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 240 transitions, 929 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-18 19:40:13,331 INFO L231 Difference]: Finished difference. Result has 258 places, 205 transitions, 606 flow [2022-11-18 19:40:13,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=606, PETRI_PLACES=258, PETRI_TRANSITIONS=205} [2022-11-18 19:40:13,332 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 57 predicate places. [2022-11-18 19:40:13,333 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 205 transitions, 606 flow [2022-11-18 19:40:13,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:13,334 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:13,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:40:13,334 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash 830036503, now seen corresponding path program 1 times [2022-11-18 19:40:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505726889] [2022-11-18 19:40:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:13,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505726889] [2022-11-18 19:40:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505726889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697776296] [2022-11-18 19:40:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:13,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:13,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:40:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:40:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:14,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697776296] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:14,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:14,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-18 19:40:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720597182] [2022-11-18 19:40:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:40:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:40:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:40:14,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-18 19:40:14,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 205 transitions, 606 flow. Second operand has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:14,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:14,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-18 19:40:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:15,442 INFO L130 PetriNetUnfolder]: 151/1081 cut-off events. [2022-11-18 19:40:15,443 INFO L131 PetriNetUnfolder]: For 810/832 co-relation queries the response was YES. [2022-11-18 19:40:15,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 1081 events. 151/1081 cut-off events. For 810/832 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6677 event pairs, 50 based on Foata normal form. 7/1038 useless extension candidates. Maximal degree in co-relation 1964. Up to 107 conditions per place. [2022-11-18 19:40:15,454 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 72 selfloop transitions, 15 changer transitions 0/239 dead transitions. [2022-11-18 19:40:15,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 239 transitions, 929 flow [2022-11-18 19:40:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:40:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 19:40:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2447 transitions. [2022-11-18 19:40:15,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7733881163084703 [2022-11-18 19:40:15,459 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2447 transitions. [2022-11-18 19:40:15,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2447 transitions. [2022-11-18 19:40:15,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:15,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2447 transitions. [2022-11-18 19:40:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.78571428571428) internal successors, (2447), 14 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,473 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,473 INFO L175 Difference]: Start difference. First operand has 258 places, 205 transitions, 606 flow. Second operand 14 states and 2447 transitions. [2022-11-18 19:40:15,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 239 transitions, 929 flow [2022-11-18 19:40:15,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 239 transitions, 827 flow, removed 26 selfloop flow, removed 24 redundant places. [2022-11-18 19:40:15,483 INFO L231 Difference]: Finished difference. Result has 230 places, 209 transitions, 579 flow [2022-11-18 19:40:15,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=579, PETRI_PLACES=230, PETRI_TRANSITIONS=209} [2022-11-18 19:40:15,485 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-18 19:40:15,485 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 209 transitions, 579 flow [2022-11-18 19:40:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:15,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:15,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:40:15,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1955066821, now seen corresponding path program 1 times [2022-11-18 19:40:15,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:15,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540860797] [2022-11-18 19:40:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:15,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540860797] [2022-11-18 19:40:15,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540860797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:15,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:15,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:40:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492943207] [2022-11-18 19:40:15,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:40:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:40:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:40:15,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-18 19:40:15,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 209 transitions, 579 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:15,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-18 19:40:15,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:16,163 INFO L130 PetriNetUnfolder]: 94/772 cut-off events. [2022-11-18 19:40:16,163 INFO L131 PetriNetUnfolder]: For 367/373 co-relation queries the response was YES. [2022-11-18 19:40:16,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 772 events. 94/772 cut-off events. For 367/373 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3887 event pairs, 56 based on Foata normal form. 7/730 useless extension candidates. Maximal degree in co-relation 1341. Up to 167 conditions per place. [2022-11-18 19:40:16,169 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 59 selfloop transitions, 8 changer transitions 3/224 dead transitions. [2022-11-18 19:40:16,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 224 transitions, 778 flow [2022-11-18 19:40:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:40:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:40:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1431 transitions. [2022-11-18 19:40:16,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914823008849557 [2022-11-18 19:40:16,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1431 transitions. [2022-11-18 19:40:16,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1431 transitions. [2022-11-18 19:40:16,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:16,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1431 transitions. [2022-11-18 19:40:16,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,209 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,209 INFO L175 Difference]: Start difference. First operand has 230 places, 209 transitions, 579 flow. Second operand 8 states and 1431 transitions. [2022-11-18 19:40:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 224 transitions, 778 flow [2022-11-18 19:40:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 224 transitions, 756 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-11-18 19:40:16,219 INFO L231 Difference]: Finished difference. Result has 228 places, 208 transitions, 576 flow [2022-11-18 19:40:16,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=228, PETRI_TRANSITIONS=208} [2022-11-18 19:40:16,225 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 27 predicate places. [2022-11-18 19:40:16,225 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 208 transitions, 576 flow [2022-11-18 19:40:16,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:16,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:40:16,227 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1256128903, now seen corresponding path program 1 times [2022-11-18 19:40:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700278046] [2022-11-18 19:40:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:16,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:16,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700278046] [2022-11-18 19:40:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700278046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:16,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:40:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976654046] [2022-11-18 19:40:16,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:40:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:40:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:40:16,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-18 19:40:16,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 208 transitions, 576 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:16,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-18 19:40:16,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:16,665 INFO L130 PetriNetUnfolder]: 113/776 cut-off events. [2022-11-18 19:40:16,665 INFO L131 PetriNetUnfolder]: For 415/459 co-relation queries the response was YES. [2022-11-18 19:40:16,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 776 events. 113/776 cut-off events. For 415/459 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3720 event pairs, 65 based on Foata normal form. 27/748 useless extension candidates. Maximal degree in co-relation 1356. Up to 205 conditions per place. [2022-11-18 19:40:16,671 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 46 selfloop transitions, 6 changer transitions 13/219 dead transitions. [2022-11-18 19:40:16,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 219 transitions, 738 flow [2022-11-18 19:40:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:40:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:40:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1428 transitions. [2022-11-18 19:40:16,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-18 19:40:16,675 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1428 transitions. [2022-11-18 19:40:16,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1428 transitions. [2022-11-18 19:40:16,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:16,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1428 transitions. [2022-11-18 19:40:16,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,683 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,683 INFO L175 Difference]: Start difference. First operand has 228 places, 208 transitions, 576 flow. Second operand 8 states and 1428 transitions. [2022-11-18 19:40:16,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 219 transitions, 738 flow [2022-11-18 19:40:16,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 219 transitions, 721 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-18 19:40:16,689 INFO L231 Difference]: Finished difference. Result has 232 places, 204 transitions, 543 flow [2022-11-18 19:40:16,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=232, PETRI_TRANSITIONS=204} [2022-11-18 19:40:16,691 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 31 predicate places. [2022-11-18 19:40:16,691 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 204 transitions, 543 flow [2022-11-18 19:40:16,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:16,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:16,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:16,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:40:16,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563713, now seen corresponding path program 1 times [2022-11-18 19:40:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428943589] [2022-11-18 19:40:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:16,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:17,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428943589] [2022-11-18 19:40:17,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428943589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703980571] [2022-11-18 19:40:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:17,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:17,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:17,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:40:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:17,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:40:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:17,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703980571] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:18,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:18,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-18 19:40:18,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071017780] [2022-11-18 19:40:18,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:40:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:40:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:40:18,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-18 19:40:18,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 204 transitions, 543 flow. Second operand has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:18,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:18,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-18 19:40:18,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:18,726 INFO L130 PetriNetUnfolder]: 102/732 cut-off events. [2022-11-18 19:40:18,726 INFO L131 PetriNetUnfolder]: For 366/397 co-relation queries the response was YES. [2022-11-18 19:40:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 732 events. 102/732 cut-off events. For 366/397 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3647 event pairs, 24 based on Foata normal form. 36/732 useless extension candidates. Maximal degree in co-relation 1268. Up to 139 conditions per place. [2022-11-18 19:40:18,732 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 48 selfloop transitions, 13 changer transitions 0/213 dead transitions. [2022-11-18 19:40:18,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 213 transitions, 712 flow [2022-11-18 19:40:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:40:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 19:40:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2252 transitions. [2022-11-18 19:40:18,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7665078284547311 [2022-11-18 19:40:18,739 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2252 transitions. [2022-11-18 19:40:18,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2252 transitions. [2022-11-18 19:40:18,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:18,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2252 transitions. [2022-11-18 19:40:18,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.23076923076923) internal successors, (2252), 13 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:18,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:18,754 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:18,755 INFO L175 Difference]: Start difference. First operand has 232 places, 204 transitions, 543 flow. Second operand 13 states and 2252 transitions. [2022-11-18 19:40:18,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 213 transitions, 712 flow [2022-11-18 19:40:18,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 213 transitions, 677 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-18 19:40:18,762 INFO L231 Difference]: Finished difference. Result has 230 places, 205 transitions, 556 flow [2022-11-18 19:40:18,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=230, PETRI_TRANSITIONS=205} [2022-11-18 19:40:18,763 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-18 19:40:18,764 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 205 transitions, 556 flow [2022-11-18 19:40:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:18,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:18,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:18,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:18,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:40:18,977 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -977050469, now seen corresponding path program 1 times [2022-11-18 19:40:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:18,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156581434] [2022-11-18 19:40:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:40:20,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:20,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156581434] [2022-11-18 19:40:20,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156581434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:20,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476176350] [2022-11-18 19:40:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:20,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:20,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:40:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 19:40:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:21,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:23,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476176350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:23,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:40:23,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-11-18 19:40:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494722214] [2022-11-18 19:40:23,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 19:40:23,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 19:40:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 19:40:23,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 226 [2022-11-18 19:40:23,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 205 transitions, 556 flow. Second operand has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:23,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:23,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 226 [2022-11-18 19:40:23,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:26,726 INFO L130 PetriNetUnfolder]: 435/2664 cut-off events. [2022-11-18 19:40:26,727 INFO L131 PetriNetUnfolder]: For 1174/1294 co-relation queries the response was YES. [2022-11-18 19:40:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5055 conditions, 2664 events. 435/2664 cut-off events. For 1174/1294 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 22572 event pairs, 198 based on Foata normal form. 119/2660 useless extension candidates. Maximal degree in co-relation 5037. Up to 317 conditions per place. [2022-11-18 19:40:26,750 INFO L137 encePairwiseOnDemand]: 202/226 looper letters, 231 selfloop transitions, 41 changer transitions 29/421 dead transitions. [2022-11-18 19:40:26,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 421 transitions, 1825 flow [2022-11-18 19:40:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 19:40:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 19:40:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4960 transitions. [2022-11-18 19:40:26,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6096361848574238 [2022-11-18 19:40:26,766 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4960 transitions. [2022-11-18 19:40:26,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4960 transitions. [2022-11-18 19:40:26,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:26,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4960 transitions. [2022-11-18 19:40:26,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 137.77777777777777) internal successors, (4960), 36 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:26,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:26,796 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:26,796 INFO L175 Difference]: Start difference. First operand has 230 places, 205 transitions, 556 flow. Second operand 36 states and 4960 transitions. [2022-11-18 19:40:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 421 transitions, 1825 flow [2022-11-18 19:40:26,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 421 transitions, 1781 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-18 19:40:26,807 INFO L231 Difference]: Finished difference. Result has 270 places, 232 transitions, 818 flow [2022-11-18 19:40:26,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=818, PETRI_PLACES=270, PETRI_TRANSITIONS=232} [2022-11-18 19:40:26,808 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-18 19:40:26,808 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 232 transitions, 818 flow [2022-11-18 19:40:26,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:26,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:26,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:26,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:40:27,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2064376575, now seen corresponding path program 1 times [2022-11-18 19:40:27,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:27,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142069780] [2022-11-18 19:40:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142069780] [2022-11-18 19:40:28,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142069780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:28,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186055011] [2022-11-18 19:40:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:28,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:28,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:28,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:28,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:40:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:40:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:28,617 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 19:40:28,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-18 19:40:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:28,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:28,870 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-18 19:40:28,870 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 32 treesize of output 50 [2022-11-18 19:40:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186055011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:28,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:40:28,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-11-18 19:40:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628731001] [2022-11-18 19:40:28,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:28,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 19:40:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 19:40:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:40:28,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-18 19:40:28,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 232 transitions, 818 flow. Second operand has 31 states, 31 states have (on average 154.09677419354838) internal successors, (4777), 31 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:28,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:28,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-18 19:40:28,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:36,449 INFO L130 PetriNetUnfolder]: 12171/28358 cut-off events. [2022-11-18 19:40:36,449 INFO L131 PetriNetUnfolder]: For 14588/14721 co-relation queries the response was YES. [2022-11-18 19:40:36,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61160 conditions, 28358 events. 12171/28358 cut-off events. For 14588/14721 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 305355 event pairs, 4305 based on Foata normal form. 23/27184 useless extension candidates. Maximal degree in co-relation 61126. Up to 5143 conditions per place. [2022-11-18 19:40:36,774 INFO L137 encePairwiseOnDemand]: 194/226 looper letters, 353 selfloop transitions, 93 changer transitions 0/608 dead transitions. [2022-11-18 19:40:36,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 608 transitions, 2917 flow [2022-11-18 19:40:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 19:40:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 19:40:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5847 transitions. [2022-11-18 19:40:36,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7186578171091446 [2022-11-18 19:40:36,787 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5847 transitions. [2022-11-18 19:40:36,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5847 transitions. [2022-11-18 19:40:36,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:36,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5847 transitions. [2022-11-18 19:40:36,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 162.41666666666666) internal successors, (5847), 36 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:36,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:36,817 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:36,817 INFO L175 Difference]: Start difference. First operand has 270 places, 232 transitions, 818 flow. Second operand 36 states and 5847 transitions. [2022-11-18 19:40:36,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 608 transitions, 2917 flow [2022-11-18 19:40:36,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 608 transitions, 2878 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-18 19:40:36,904 INFO L231 Difference]: Finished difference. Result has 314 places, 309 transitions, 1509 flow [2022-11-18 19:40:36,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1509, PETRI_PLACES=314, PETRI_TRANSITIONS=309} [2022-11-18 19:40:36,906 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 113 predicate places. [2022-11-18 19:40:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 309 transitions, 1509 flow [2022-11-18 19:40:36,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 154.09677419354838) internal successors, (4777), 31 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:36,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:36,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:36,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:37,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:40:37,116 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 598521685, now seen corresponding path program 2 times [2022-11-18 19:40:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:37,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147033166] [2022-11-18 19:40:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:38,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:38,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147033166] [2022-11-18 19:40:38,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147033166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:38,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:38,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 19:40:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710325202] [2022-11-18 19:40:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:38,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:40:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:40:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:40:38,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-18 19:40:38,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 309 transitions, 1509 flow. Second operand has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:38,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:38,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-18 19:40:38,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:40:47,908 INFO L130 PetriNetUnfolder]: 14584/35152 cut-off events. [2022-11-18 19:40:47,908 INFO L131 PetriNetUnfolder]: For 75327/75506 co-relation queries the response was YES. [2022-11-18 19:40:48,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101831 conditions, 35152 events. 14584/35152 cut-off events. For 75327/75506 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 401305 event pairs, 7815 based on Foata normal form. 60/34872 useless extension candidates. Maximal degree in co-relation 101777. Up to 13056 conditions per place. [2022-11-18 19:40:48,439 INFO L137 encePairwiseOnDemand]: 196/226 looper letters, 270 selfloop transitions, 122 changer transitions 0/554 dead transitions. [2022-11-18 19:40:48,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 554 transitions, 3671 flow [2022-11-18 19:40:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:40:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 19:40:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4173 transitions. [2022-11-18 19:40:48,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7101769911504425 [2022-11-18 19:40:48,448 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4173 transitions. [2022-11-18 19:40:48,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4173 transitions. [2022-11-18 19:40:48,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:40:48,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4173 transitions. [2022-11-18 19:40:48,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 160.5) internal successors, (4173), 26 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:48,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:48,470 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:48,470 INFO L175 Difference]: Start difference. First operand has 314 places, 309 transitions, 1509 flow. Second operand 26 states and 4173 transitions. [2022-11-18 19:40:48,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 554 transitions, 3671 flow [2022-11-18 19:40:49,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 554 transitions, 3640 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-11-18 19:40:49,285 INFO L231 Difference]: Finished difference. Result has 344 places, 389 transitions, 2621 flow [2022-11-18 19:40:49,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2621, PETRI_PLACES=344, PETRI_TRANSITIONS=389} [2022-11-18 19:40:49,287 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-18 19:40:49,287 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 389 transitions, 2621 flow [2022-11-18 19:40:49,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:49,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:40:49,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:49,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 19:40:49,289 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:40:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash -519156441, now seen corresponding path program 1 times [2022-11-18 19:40:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417499266] [2022-11-18 19:40:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:40:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417499266] [2022-11-18 19:40:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417499266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:50,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:50,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 19:40:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598751779] [2022-11-18 19:40:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:40:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:40:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:40:50,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-18 19:40:50,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 389 transitions, 2621 flow. Second operand has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:50,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:40:50,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-18 19:40:50,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:41:02,214 INFO L130 PetriNetUnfolder]: 16191/40823 cut-off events. [2022-11-18 19:41:02,214 INFO L131 PetriNetUnfolder]: For 121526/121737 co-relation queries the response was YES. [2022-11-18 19:41:02,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126131 conditions, 40823 events. 16191/40823 cut-off events. For 121526/121737 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 490252 event pairs, 9677 based on Foata normal form. 72/40464 useless extension candidates. Maximal degree in co-relation 126064. Up to 13056 conditions per place. [2022-11-18 19:41:02,869 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 319 selfloop transitions, 90 changer transitions 0/571 dead transitions. [2022-11-18 19:41:02,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 571 transitions, 4784 flow [2022-11-18 19:41:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:41:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 19:41:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3394 transitions. [2022-11-18 19:41:02,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7151285292878213 [2022-11-18 19:41:02,876 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3394 transitions. [2022-11-18 19:41:02,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3394 transitions. [2022-11-18 19:41:02,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:41:02,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3394 transitions. [2022-11-18 19:41:02,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.61904761904762) internal successors, (3394), 21 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:02,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:02,896 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:02,896 INFO L175 Difference]: Start difference. First operand has 344 places, 389 transitions, 2621 flow. Second operand 21 states and 3394 transitions. [2022-11-18 19:41:02,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 571 transitions, 4784 flow [2022-11-18 19:41:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 571 transitions, 4489 flow, removed 134 selfloop flow, removed 8 redundant places. [2022-11-18 19:41:04,397 INFO L231 Difference]: Finished difference. Result has 364 places, 407 transitions, 2881 flow [2022-11-18 19:41:04,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2881, PETRI_PLACES=364, PETRI_TRANSITIONS=407} [2022-11-18 19:41:04,399 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 163 predicate places. [2022-11-18 19:41:04,399 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 407 transitions, 2881 flow [2022-11-18 19:41:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:04,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:41:04,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:04,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 19:41:04,403 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:41:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2122981981, now seen corresponding path program 3 times [2022-11-18 19:41:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:41:04,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116720952] [2022-11-18 19:41:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:41:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:41:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:41:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:41:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:41:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116720952] [2022-11-18 19:41:05,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116720952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:41:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499280215] [2022-11-18 19:41:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:41:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:41:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:41:05,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:41:05,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:41:05,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:41:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:05,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:41:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:06,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:41:06,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:07,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:07,479 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 19:41:07,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-18 19:41:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:41:07,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:41:08,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499280215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:08,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:41:08,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 10] total 45 [2022-11-18 19:41:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304266318] [2022-11-18 19:41:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:08,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 19:41:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:41:08,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 19:41:08,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1754, Unknown=30, NotChecked=0, Total=1980 [2022-11-18 19:41:08,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 226 [2022-11-18 19:41:08,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 407 transitions, 2881 flow. Second operand has 45 states, 45 states have (on average 137.46666666666667) internal successors, (6186), 45 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:08,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:41:08,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 226 [2022-11-18 19:41:08,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:41:27,173 INFO L130 PetriNetUnfolder]: 20726/50967 cut-off events. [2022-11-18 19:41:27,173 INFO L131 PetriNetUnfolder]: For 150386/150562 co-relation queries the response was YES. [2022-11-18 19:41:27,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160948 conditions, 50967 events. 20726/50967 cut-off events. For 150386/150562 co-relation queries the response was YES. Maximal size of possible extension queue 2001. Compared 621282 event pairs, 7425 based on Foata normal form. 162/50691 useless extension candidates. Maximal degree in co-relation 160873. Up to 12420 conditions per place. [2022-11-18 19:41:28,088 INFO L137 encePairwiseOnDemand]: 186/226 looper letters, 449 selfloop transitions, 257 changer transitions 0/837 dead transitions. [2022-11-18 19:41:28,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 837 transitions, 7182 flow [2022-11-18 19:41:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 19:41:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 19:41:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6355 transitions. [2022-11-18 19:41:28,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6390788415124699 [2022-11-18 19:41:28,099 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6355 transitions. [2022-11-18 19:41:28,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6355 transitions. [2022-11-18 19:41:28,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:41:28,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6355 transitions. [2022-11-18 19:41:28,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 144.4318181818182) internal successors, (6355), 44 states have internal predecessors, (6355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:28,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:28,128 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:28,129 INFO L175 Difference]: Start difference. First operand has 364 places, 407 transitions, 2881 flow. Second operand 44 states and 6355 transitions. [2022-11-18 19:41:28,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 837 transitions, 7182 flow [2022-11-18 19:41:30,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 837 transitions, 7046 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-11-18 19:41:30,148 INFO L231 Difference]: Finished difference. Result has 423 places, 544 transitions, 5231 flow [2022-11-18 19:41:30,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5231, PETRI_PLACES=423, PETRI_TRANSITIONS=544} [2022-11-18 19:41:30,149 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 222 predicate places. [2022-11-18 19:41:30,149 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 544 transitions, 5231 flow [2022-11-18 19:41:30,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 137.46666666666667) internal successors, (6186), 45 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:30,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:41:30,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:30,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 19:41:30,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:41:30,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:41:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1887527651, now seen corresponding path program 2 times [2022-11-18 19:41:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:41:30,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395135156] [2022-11-18 19:41:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:41:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:41:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:41:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:41:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:41:31,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395135156] [2022-11-18 19:41:31,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395135156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:41:31,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129029163] [2022-11-18 19:41:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:41:31,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:41:31,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:41:31,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:41:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57420855-4fc1-4b8a-b1c1-1e17ff30401d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:41:31,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:41:31,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:41:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:31,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 19:41:32,238 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:41:32,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:41:32,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:32,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:32,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:41:33,218 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 19:41:33,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-18 19:41:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:41:33,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:41:33,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129029163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:33,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:41:33,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 9] total 49 [2022-11-18 19:41:33,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362699284] [2022-11-18 19:41:33,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:33,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 19:41:33,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:41:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 19:41:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 19:41:33,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 226 [2022-11-18 19:41:33,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 544 transitions, 5231 flow. Second operand has 49 states, 49 states have (on average 134.40816326530611) internal successors, (6586), 49 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:33,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:41:33,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 226 [2022-11-18 19:41:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand